Time Converter: Convert 26 Time Units Instantly (Free)

How many seconds are in a day? How many weeks in a year? And what on earth is a "shake"? If you have ever paused mid-task to work out a time conversion in your head - and second-guessed the answer - this page was built for you. The free Time Converter above lets you convert time units online instantly, and the guide below explains everything the tool does, every unit it covers, and the exact time conversion formulas behind each result, so you can trust the numbers and understand them too.

Time is the one measurement system almost nobody thinks about until it trips them up. Unlike meters or kilograms, time units do not scale in tidy powers of ten. Sixty seconds make a minute, sixty minutes make an hour, twenty-four hours make a day, seven days make a week - and then months and years refuse to divide evenly into anything at all. That messy history is exactly why a reliable time unit converter earns a permanent spot in your bookmarks.

Time Converter Embed Code for Your Website:

Have you ever found yourself staring at a number, wondering how many seconds are in a day? Or how many hours you've actually spent on that project? Time is the most precious resource we have, yet converting between its many units can sometimes feel like solving a puzzle. That's exactly why this tool was created.

You can copy this code and embed it on your website to give your visitors a thoughtful, practical tool that simplifies their daily calculations. Whether they're planning a trip, managing a project, or just curious about time, this converter turns complex conversions into a simple, intuitive experience.

The Time Converter is a beautifully interactive tool that allows your website visitors to instantly convert between seconds, minutes, hours, days, weeks, months, and years. Simply input a value in any unit, and watch as all other units update automatically - like magic, but better because it actually helps you get things done.

This tool is perfect for productivity blogs, educational platforms, project management sites, travel blogs, or any website where time plays a central role in your visitors' lives. It's a small addition that makes a big difference in how people engage with time.

The code is available in six global languages to welcome visitors from all corners of the world: English - Spanish - French - Arabic - Chinese - Hindi.

You can easily switch the converter language by changing the parameter in the URL: ?lang=en

Available languages: en - es - fr - ar - zh - hi

1- Isolated iFrame Code (Ideal for Articles and Pages):

If you're writing an article about time management, productivity, or planning, this method allows you to embed the tool directly within your content. The isolated iframe ensures everything runs smoothly and cleanly, so your readers can interact with the tool without any distractions or technical glitches.

<iframe id="tq_time_converter" src="https://tools.tooliqo.co/time-converter/?lang=en" title="Tooliqo" loading="lazy" scrolling="no" style="width:100%;max-width:100%;height:620px;border:0;overflow:hidden;display:block;margin:0 auto;"></iframe>
<script>(function(){var i="tq_time_converter",b="https://tools.tooliqo.co/time-converter/",dl="en";function L(){try{var h=(document.documentElement.getAttribute("lang")||"").toLowerCase();var ok=["ar","en","fr","es","zh","hi"];for(var k=0;k<ok.length;k++){if(h.indexOf(ok[k])===0)return ok[k];}}catch(e){}return dl;}function R(){var f=document.getElementById(i);if(!f)return;var lg=L();if(lg){var want=b+"?lang="+lg;if((f.getAttribute("src")||"").indexOf("lang="+lg)===-1)f.setAttribute("src",want);}window.addEventListener("message",function(e){var d=e.data;if(!d||typeof d.tqHeight!=="number"||d.tqHeight<50)return;try{if(f.contentWindow&&e.source&&e.source!==f.contentWindow)return;}catch(x){}f.style.height=(d.tqHeight+20)+"px";},false);}if(document.readyState==="loading"){document.addEventListener("DOMContentLoaded",R);}else{R();}})();</script>

2- Flexible Script (Suitable for Sidebars and Templates):

This method is perfect for sidebars, footers, or widget areas where you want the tool to be always accessible. The converter loads beautifully and quickly, becoming a quiet companion that helps your visitors make sense of their time - whether they're planning a deadline, scheduling a meeting, or simply exploring the fascinating relationships between different time units.

Just drop these lines into your website's code, and the Time Converter will appear instantly, ready to help. It's responsive by design, so it looks wonderful on desktops, tablets, and phones alike.

 <div class="tooliqo-tool" data-tool="time-converter" data-lang="en"></div>
<script src="https://tools.tooliqo.co/embed.js" async></script>

Note: The Time Converter works in real-time, instantly reflecting changes as your visitors type. No page reloads, no waiting - just a smooth, thoughtful experience that respects your visitors' time as much as they value it. Because after all, time is the one thing we all share, and it's worth getting right.

What Is a Time Converter?

A time converter is a calculator that translates a duration expressed in one unit into its exact equivalent in another. Type 90 minutes, get 1.5 hours. Type 2 weeks, get 1,209,600 seconds. Type 66 million years - roughly the time since the dinosaurs vanished - and see it expressed in days, centuries, or millennia without touching a calculator app.

That sounds simple, and mathematically it is. The value of a good time conversion calculator is not the arithmetic itself but three things around it: correct conversion factors (months and years are trickier than most people realize), sensible formatting (an answer like 3.15576e16 helps nobody unless it is presented cleanly), and speed (you should not need five taps and a page reload to learn that 7,200 seconds is 2 hours).

People reach for a time unit converter far more often than they expect: converting project estimates between hours and working days, translating scientific figures between nanoseconds and milliseconds, working out how many minutes of video fit into a storage plan, checking how many days old a child is, or settling a friendly argument about how many seconds are in a year. (Spoiler: it depends on which year you mean - more on that below.)

Meet the Tooliqo Time Converter: What Makes It Different

The converter embedded at the top of this page was designed and built by Tooliqo as a complete rethink of the classic unit calculator. It is not a generic widget; every feature below was implemented specifically for this tool, and this page is its official home.

26 time units, carefully chosen

Most online converters stop at ten or twelve units. This one covers 26 units of time, organized into five logical groups so the dropdown never feels overwhelming: sub-second units (yoctosecond up to millisecond, including the physicist's beloved shake), everyday units (second, minute, hour, plus the medieval "moment"), day-scale units (day, week, fortnight), calendar units (month, common year, average year, Gregorian year, leap year), and long spans (decade, century, millennium, megayear, gigayear). If a unit of time has a real name and a real use, it is probably in the list.

It converts as you type

There is no Convert button. Change the number, change either unit, or hit the swap arrow, and the result updates instantly. The tool also remembers your last-used units and language on your device, so returning visitors pick up exactly where they left off.

Six languages, including full right-to-left Arabic

The interface runs in English, Arabic, French, Spanish, Chinese, and Hindi. It auto-detects your browser language and offers a manual switcher, and the Arabic version is not a token translation - the entire layout mirrors correctly for right-to-left reading, while numbers stay in the familiar left-to-right form. Even the thousands separators adapt: a French user sees numbers grouped the French way, a Hindi user sees the lakh-crore grouping, automatically.

The all-units table: one input, 26 answers

Open the "All units" panel and the tool shows your value converted into every one of the 26 units at once, with your selected pair highlighted. It is the fastest way to build intuition: type 1 day and you can see 86,400 seconds, 1,440 minutes, 24 hours, 0.1429 weeks, and 0.0329 average months in a single glance.

It teaches while it calculates

Under every result the tool prints the conversion factor it used - for example, "1 hour = 3,600 seconds". You never get a mystery number. Very large and very small results switch to clean scientific notation with proper superscripts (3.15576×10¹⁶ rather than a wall of zeros), which is exactly how a scientist would write them.

Dark mode, accessibility, and one-tap copy

The converter follows your device's light or dark preference and includes a manual toggle. It is fully keyboard-navigable, screen-reader friendly, and results can be copied to the clipboard with one tap - formatted and ready to paste into a report, a spreadsheet, or a chat.

Private by design

Everything runs locally in your browser. The numbers you type are never transmitted, stored, or analyzed by any server. There is no sign-up, no ads inside the tool, and no cost - it is free to use, as many times as you like, on any device.

How to Use the Time Converter (Step by Step)

The tool is self-explanatory, but here is the complete walkthrough:

Step 1 - Enter your value. Type any number into the Value field: whole numbers, decimals (2.5), negatives, or even scientific notation like 1e9 for one billion. The result appears immediately.

Step 2 - Pick the "From" unit. Choose the unit your value is currently in. The dropdown is grouped, so seconds-to-hours units, calendar units, and long spans each live in their own section.

Step 3 - Pick the "To" unit. Choose the unit you want. The converted result displays in large type, with the exact conversion factor printed beneath it.

Step 4 - Swap, copy, or explore. The circular arrow button reverses the direction of the conversion in one tap (hours to minutes becomes minutes to hours). The Copy button places the full result on your clipboard. And the "All units" panel expands to show your value in every supported unit simultaneously.

Step 5 - Switch language or theme if you like. The globe menu changes the interface language; the moon/sun button toggles dark mode. Both choices are remembered for your next visit.

The Complete Time Units Table (Exact Values)

This is the master reference behind the tool - the same time conversion chart the converter uses internally, published here in full. Every value is expressed in SI seconds, the base unit of time. Bookmark it: this single table answers the vast majority of "how many X in a Y" questions.

Two entries deserve a note. The month in this table is the average calendar month: 365.25 days divided by 12 gives 30.4375 days, or 2,629,800 seconds. Real months range from 28 to 31 days, so the average is the only honest single value a converter can use. Likewise the standard year here is 365.25 days - the astronomical (Julian) average - which keeps every derived unit, from decades to gigayears, perfectly consistent. If you need a specific calendar year instead, the tool offers common (365-day), Gregorian (365.2425-day), and leap (366-day) years as separate units. That level of precision is rare in online converters, and it exists here because "how many seconds in a year" genuinely has more than one correct answer.

The Time Conversion Formula (With Worked Examples)

Every conversion the tool performs - all 650 possible unit pairs - reduces to one universal formula. Master it once and you can convert any time unit into any other with nothing but a basic calculator.

In plain language: first express your value in seconds, then ask how many of the target unit fit into that many seconds. The master table above supplies both numbers. Let us walk through three examples exactly the way the converter computes them.

Example 1: Convert 3 days to minutes

From the table, 1 day = 86,400 seconds and 1 minute = 60 seconds. So: 3 × 86,400 ÷ 60 = 259,200 ÷ 60 = 4,320 minutes. A useful shortcut falls out of this: since 86,400 ÷ 60 = 1,440, there are always 1,440 minutes in a day, and you can simply multiply days by 1,440.

Example 2: Convert 90 minutes to hours

1 minute = 60 seconds, 1 hour = 3,600 seconds. So: 90 × 60 ÷ 3,600 = 5,400 ÷ 3,600 = 1.5 hours. This is the conversion behind every "the movie runs 137 minutes - how long is that?" moment (2 hours 17 minutes, since 0.2833 hours × 60 gives 17 minutes).

Example 3: Convert 2 average months to weeks

1 average month = 2,629,800 seconds, 1 week = 604,800 seconds. So: 2 × 2,629,800 ÷ 604,800 = 5,259,600 ÷ 604,800 = 8.696 weeks. Notice it is not a clean 8 weeks - a month is about 4.35 weeks, not 4, which is one of the most common estimation errors in project planning. Over a year, "a month is 4 weeks" quietly loses you more than 4 weeks.

Quick Time Conversion Chart: The Values Everyone Searches For

These are the conversions people look up most, precomputed from the master table. They match the tool's output exactly.

That famous figure of 525,600 minutes, by the way - the one an entire Broadway musical is named around - assumes a 365-day common year. Use the average 365.25-day year and it becomes 525,960 minutes. Small distinction, but it is exactly the kind of detail that separates a careful converter from a careless one.

From Yoctoseconds to Shakes: A Tour of the Sub-Second World

Below one second, time units follow the metric prefixes, each step a thousand times smaller than the last: millisecond (10^-3), microsecond (10^-6), nanosecond (10^-9), picosecond (10^-12), femtosecond (10^-15), attosecond (10^-18), zeptosecond (10^-21), and yoctosecond (10^-24). These are not academic curiosities - each one is the working unit of an entire field.

Milliseconds govern human experience: a blink lasts around 100-150 ms, a typical human reaction time is about 200-250 ms, and competitive gamers argue passionately about 20 ms of display lag. Microseconds matter in high-speed trading and lightning research. Nanoseconds are the currency of computing - a 4 GHz processor completes a clock cycle in a quarter of a nanosecond, and in one nanosecond light travels only about 30 centimeters, which is why the physical length of circuit traces limits computer speed. GPS satellites must correct their clocks by about 38 microseconds per day for relativistic effects; without that correction, position errors would grow by kilometers daily.

Femtoseconds are where chemistry happens - molecular bonds vibrate on this scale, and femtosecond laser pulses are used in LASIK eye surgery precisely because they cut before heat can spread. Attoseconds capture electrons in motion; the 2023 Nobel Prize in Physics honored the experimental methods that generate attosecond light pulses. In 2020, physicists measured the shortest duration ever recorded: about 247 zeptoseconds, the time a photon takes to cross a hydrogen molecule. And the yoctosecond belongs to theoretical particle physics - quark-gluon plasma phenomena play out on this almost unimaginable scale.

Then there is the delightful oddball: the shake, exactly 10 nanoseconds. The name comes from the Manhattan Project era and the old expression "two shakes of a lamb's tail," meaning a very short moment. Nuclear physicists needed a convenient unit for the steps of a chain reaction - one generation of fission takes roughly one shake - and the nickname stuck. It remains in genuine use in nuclear engineering today, which is why this converter includes it.

Seconds, Minutes, and Hours: Babylon's 4,000-Year-Old Legacy

Ever wondered why an hour has 60 minutes rather than 100? Blame - or thank - ancient Mesopotamia. The Sumerians and Babylonians counted in base 60 (sexagesimal), likely because 60 divides evenly by 2, 3, 4, 5, 6, 10, 12, 15, 20, and 30, which makes mental fractions painless. When Greek astronomers later divided the hour, they kept the Babylonian system: a first small division ("pars minuta prima" in Latin, the origin of "minute") and a second one ("pars minuta secunda" - literally where the word "second" comes from).

The modern second is defined with breathtaking precision: since 1967, it is the duration of exactly 9,192,631,770 oscillations of the radiation from a cesium-133 atom. Atomic clocks built on this definition drift by less than a second over hundreds of millions of years. Every value in the converter ultimately rests on that definition, because the second is the SI base unit from which all other time units are derived.

The moment, included in this tool as a 90-second unit, is a genuine medieval measure: monks divided each hour into 40 "momenta" for scheduling prayers, making a moment 1/40 of an hour. So the next time someone says "I'll be there in a moment," you can inform them they have committed to exactly a minute and a half.

Days, Weeks, and Fortnights

The day - one rotation of the Earth - is the most natural time unit humans have, standardized at exactly 86,400 seconds. (Earth's actual rotation wobbles by milliseconds, which is why official timekeepers occasionally insert leap seconds, but for every practical conversion, 86,400 is the number.)

The week is stranger than it looks: it is the only major time unit with no astronomical basis whatsoever. Seven days corresponds to nothing in the sky - it descends from Babylonian tradition and the seven classical "planets" (Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn), later cemented by religious observance. Yet it has survived unchanged for millennia, through calendar reforms that redrew everything else.

The fortnight - 14 days - comes from the Old English for "fourteen nights." It remains everyday vocabulary in British, Irish, Indian, and Australian English, standard for salary cycles and sports events, though it mostly vanished from American usage. Two weeks, 336 hours, 1,209,600 seconds: the converter handles it natively so you do not have to double everything by hand.

The Year Problem: Why 365.25 Days (and Why Four Kinds of Year)?

Here is the inconvenient truth that broke every ancient calendar: the Earth takes approximately 365.2422 days to orbit the Sun. Not 365. Not 366. A stubborn fraction that refuses to cooperate with whole-number calendars, and the reason this converter deliberately offers four different year units.

The common year is the 365-day calendar year - the one most quick calculations assume. But use it exclusively and you drift from the seasons by nearly a full day every four years. Julius Caesar's astronomers solved this in 45 BC with the Julian calendar: add one leap day every fourth year, making the average year exactly 365.25 days. That value - 31,557,600 seconds - is the "Year" this converter uses as its standard, because it remains the official year of astronomy (the light-year, for instance, is defined using it) and it keeps decades, centuries, millennia, megayears, and gigayears in perfect internal agreement.

Except 365.25 slightly overshoots reality too - by about 11 minutes per year. Small, but it compounds: by the 1500s the calendar had slipped roughly ten days against the seasons, and Easter was wandering. So in 1582 Pope Gregory XIII ordered the fix we still live by: century years skip the leap day unless divisible by 400 (so 1900 was not a leap year, but 2000 was). The resulting Gregorian year averages 365.2425 days - 31,556,952 seconds - accurate to about one day in 3,000 years. The reform itself was dramatic: in October 1582, ten calendar days were simply deleted, and Thursday, October 4 was followed directly by Friday, October 15.

Finally, the leap year unit (366 days, 31,622,400 seconds) is there for when you are working with an actual leap year - calculating someone's exact age in seconds across February 29, for example. Four year definitions, four honest answers; the converter lets you choose instead of choosing for you.

And the month? Since 12 months must fill one year, the average month is 365.25 ÷ 12 = 30.4375 days. That is the figure professionals use to convert monthly rates to daily ones - and the reason "30 days per month" estimates always run slightly short.

Decades, Centuries, Millennia - and Deep Time

Above the year, the units grow by powers of ten: a decade is 10 years, a century 100, a millennium 1,000. In this converter each is built on the 365.25-day year, so a century is exactly 3,155,760,000 seconds - a number worth typing into the tool at least once, just to watch a human lifespan and a billion seconds nearly coincide. (One billion seconds is about 31.7 years. If you are over 32, you have already lived through a gigasecond.)

For truly deep time, science uses the megayear (Ma) - one million years - and the gigayear (Ga) - one billion years. Geologists date rock layers in Ma: the dinosaurs died out about 66 Ma ago; the Himalayas began rising roughly 50 Ma ago. Astronomers think in Ga: the Earth formed about 4.54 Ga ago, and the universe itself is around 13.8 Ga old. Type 13.8 gigayears into the converter and switch to seconds: about 4.35×10¹⁷ seconds of cosmic history, formatted cleanly in scientific notation. Very few free tools let you convert between a nanosecond and the age of the universe in the same dropdown; this one does.

Real-World Uses: Who Actually Needs a Time Converter?

More people than you would guess - and usually at the exact moment they do not want to do arithmetic. Here are the situations this tool was tuned for.

Developers and IT professionals. Programming lives in milliseconds and seconds: timeouts, cache expiries, cron intervals, token lifetimes. "Set the session to expire in 30 days" means nothing to a config file that wants seconds - the answer is 2,592,000, and the converter produces it instantly. Unix timestamps, API rate windows, video buffer sizes: all of it is time conversion, all day long.

Project managers and freelancers. Budgets are quoted in hours, schedules in days, contracts in months. Converting 120 working hours into calendar weeks, or a 3-month retainer into billable hours, is where the "month = 4 weeks" myth silently eats margins. Using the true average - 4.348 weeks, 730.5 hours per month - keeps estimates honest.

Students and teachers. Physics problems love mixed units: a reaction takes 340 ms, a signal travels for 2.5 microseconds, an experiment runs 1.5 fortnights (some textbook authors have a sense of humor). The tool's factor line - showing exactly which multiplier was applied - doubles as a checking device for homework, and the all-units table builds the number sense that exams reward.

Scientists and lab workers. Converting between nanoseconds and picoseconds, or expressing a 72-hour incubation in minutes for an instrument that only accepts minutes, is daily routine. The clean scientific-notation output means values can go straight into a paper or dataset without reformatting.

Health, fitness, and everyday life. A training plan says 150 minutes of weekly exercise - is that 2.5 hours you can actually schedule? A recipe ferments for 36 hours - how many days is that across a weekend? A newborn is 100 days old - how many weeks (14.3) for the check-up chart? Even sleep math ("if I sleep 7.5 hours per night, how many full days do I sleep per year?" - about 114) becomes a five-second lookup.

Media and content creators. Podcast episodes measured in minutes, ad slots in seconds, contracts in quarters, YouTube analytics in hours of watch time. Converting 10,000 minutes of watch time into days (6.94) for a report is exactly the kind of small task that interrupts flow - unless the converter is one tab away.

Common Time Conversion Mistakes (and How to Avoid Them)

Mistake 1: Treating a month as 4 weeks or 30 days. A month averages 30.4375 days - 4.35 weeks. Over a year the "4 weeks" shortcut loses 29 days, a full extra month. For anything financial or contractual, use the average, or better, count actual calendar days.

Mistake 2: Mixing up year definitions. "How many seconds in a year" has four defensible answers: 31,536,000 (common), 31,557,600 (average/Julian), 31,556,952 (Gregorian), and 31,622,400 (leap). For interest calculations banks often use 365; astronomy uses 365.25; long-term averages use 365.2425. Know which one your context expects - the converter offers all four precisely so you can be explicit.

Mistake 3: Confusing durations with clock arithmetic. A time converter answers "how long" - it does not add hours to a clock time or hop between time zones. 90 minutes is always 1.5 hours, but "90 minutes after 11:00 PM" is a calendar problem, and "3 PM in London to Casablanca time" is a time-zone problem. Different questions, different tools.

Mistake 4: Misreading decimal hours as minutes. 1.5 hours is 1 hour 30 minutes, not 1 hour 50. To turn a decimal fraction of an hour into minutes, multiply the fraction by 60: 2.75 hours = 2 hours + 0.75 × 60 = 2 h 45 min. This single misread has wrecked more meeting schedules than any other conversion error.

Mistake 5: Rounding too early. Convert 7 weeks to months by rounding weeks to "about 2 months" and you get sloppy fast. Carry full precision through the calculation - the tool keeps up to 12 significant digits internally - and round only the final answer.

Time Converter vs. Date Calculator vs. Time Zone Converter

Three tools share the word "time," and mixing them up is the fastest route to a wrong answer. It is worth thirty seconds to keep them straight.

A time converter - this tool - deals in pure durations. It answers "how long": how many hours is 5,400 seconds, how many days is a fortnight, how many seconds is a gigayear. It has no idea what today's date is, and it does not need to; a duration is the same length on a Tuesday as on a Sunday.

A date calculator deals in positions on the calendar. It answers "when": what date is 90 days after March 3, how many days lie between two birthdays, which weekday was July 20, 1969. Because it works with real calendar months and real leap years, its answers depend on the specific dates involved - 90 days after March 3 and 90 days after September 3 land differently relative to month boundaries.

A time zone converter deals in simultaneity. It answers "what time is it there": 3 PM in London is what hour in Casablanca, when should a New York team join a Tokyo call. It involves no durations at all - just the same instant labeled differently around the planet, plus the seasonal chaos of daylight saving rules.

A stopwatch or timer, finally, measures or counts a duration as it happens, but does not translate between units.

The practical rule: if your question contains only units (seconds, hours, months), you want this converter. If it contains a calendar date, you want a date calculator. If it contains a city or a clock reading, you want a time zone tool. Real-world tasks often chain them - "the contract runs 180 days from May 1; how many working weeks is that, and what is the end date in Dubai time?" uses all three - but each step belongs to exactly one tool, and knowing which is which keeps the whole chain honest.

Frequently Asked Questions About Time Conversion

Final Thoughts

Time conversion looks trivial until the day a wrong factor slips into a budget, a lab report, or a line of code. The Tooliqo Time Converter exists so that never happens: 26 units, exact SI-based factors, six languages, instant results, full transparency about every multiplier it uses - free, private, and one scroll above this sentence.

Use the tool for the answer; keep this page for the understanding. And if the converter saves you a headache, share the page - someone in your team is doing "month times four weeks" math right now, and they deserve better.