Time Converter

Convert between time units instantly — pick any from and to unit.

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About the Time Converter

The Time Converter turns any duration from one unit into another, covering seconds, minutes, hours, days, weeks, months, and years. Time units relate to each other by fixed multipliers: 60 seconds make a minute, 60 minutes make an hour, and 24 hours make a day, which is why a single day holds exactly 86,400 seconds. Enter a value, pick what you have and what you want, and the tool walks every conversion through this chain so you never have to remember whether to multiply or divide. It handles whole numbers and decimals alike, so 2.5 hours converts as cleanly as 150 minutes does.

Reach for this tool whenever a number is expressed in the wrong unit for the job. Video editors convert a five-minute clip into 300 seconds to line it up on a timeline. Project managers turn a two-week estimate into hours to plan billable work or break tasks into shifts. Cooks scale a recipe timer from minutes into seconds, runners read a race time as minutes-per-distance, and students check homework that asks how many seconds sit in a week. Anywhere a deadline, runtime, or interval needs to match another system, a quick conversion removes the guesswork and the arithmetic mistakes.

Under the hood the converter uses seconds as a common base. It multiplies your input by the number of seconds in its unit, then divides by the number of seconds in the target unit. Converting 2 hours to minutes, for example, means 2 times 3,600 seconds, divided by 60, which equals 120 minutes. Days, weeks, and the smaller units are exact. Months and years are calendar averages: a month is treated as roughly 30.44 days and a year as 365.25 days to account for the leap year that arrives every four years, so those two results are close approximations rather than fixed figures.

Every calculation runs in your browser, so the values you type never leave your device or get stored on a server. That keeps schedules, project timings, and any personal durations private. For exact units the results are precise to full machine accuracy; only month and year conversions carry the small averaging difference noted above. If your work depends on a specific calendar, such as a 30-day billing month or a non-leap year, convert through days first and apply your own multiplier to stay exact.

Frequently asked questions

How many seconds are in a day, week, and year?

A day has 86,400 seconds (24 x 60 x 60) and a week has 604,800 seconds (7 days). A common year has 31,536,000 seconds and a leap year has 31,622,400; the averaged figure of about 31,557,600 seconds is based on 365.25 days.

Do I multiply or divide to convert time units?

Multiply when moving to a smaller unit and divide when moving to a larger one. Hours to minutes means multiply by 60; minutes to hours means divide by 60. This converter handles both directions automatically.

Why are the month and year results approximate?

Months vary from 28 to 31 days and years differ by leap status, so there is no single exact value. The tool uses calendar averages of about 30.44 days per month and 365.25 days per year, which is standard for general conversions.

How do I convert minutes to hours and minutes?

Divide the total minutes by 60 to get whole hours, and the remainder is the leftover minutes. For example, 150 minutes is 2 hours and 30 minutes, or 2.5 hours as a decimal.

Is the converter accurate for video and audio timing?

Yes, for seconds, minutes, and hours the results are exact, which suits clip lengths and timeline alignment. Note that it converts durations, not frames, so multiply seconds by your frame rate separately if you need a frame count.

From our blog

Cups to Milliliters: Why One Cup Isn't Always the Same Size

By the Super Simple Digital Tools Team · Updated June 2026

The single biggest mistake people make converting cups to millilitres is assuming "cup" means one universal amount. It does not. Four different cups are in common use around the world, and they range from about 236.6 mL to 284.1 mL. That spread of nearly 50 mL per cup is the hidden reason a recipe can come out fine for one cook and oddly wet or dry for another, even when both followed the instructions to the letter.

The US customary cup, the one most American cookbooks use, equals roughly 236.6 mL, derived from 8 US fluid ounces. Confusingly, US nutrition labels and serving sizes use a separate rounded cup of 240 mL, which is why packaged-food maths often looks cleaner. Outside the US, the metric cup of exactly 250 mL dominates in Australia, New Zealand, and parts of Europe, while pre-1970s British recipes may quietly assume the imperial cup of about 284.1 mL.

Knowing this, the conversion is just multiplication once you have identified the source. Multiply cups by 236.6 for US customary, by 240 for label maths, by 250 for metric, or by 284.1 for imperial. Fractions scale directly, so a three-quarter US cup is about 177 mL and a three-quarter metric cup is 187.5 mL. The converter does this instantly, but the value it returns is only as right as the cup standard you select at the start.

Whether the gap between standards matters depends on what you are making. Soups, stews, and rustic dishes shrug off a 10 to 15 mL difference per cup. Precise work does not: bread hydration, custards, candy syrups, and concentrated drink mixes can shift noticeably, and the error compounds when you multiply a recipe several times. For those, identify the cup standard carefully or switch to weighing ingredients in grams where you can.

A reliable habit is to read the recipe's origin first, then pick the matching cup. American site or book? US customary. Australian or European? Metric 250 mL. A vintage British title? Consider imperial. When the source is genuinely unclear, the US customary and metric cups are the two most likely candidates, and trying both shows you the realistic range your measurement falls within so you can judge how much the difference actually affects your result.

Set the cup type before you read the result: US customary 236.6 mL for American recipes, metric 250 mL for Australian or European ones.
Use the 240 mL option only when you are matching US nutrition labels or serving-size information, not when cooking from a traditional recipe.
Measure liquids at eye level in a level cup; a heaped or tilted cup throws the millilitre figure off before any conversion.
For flour, sugar, and other dry ingredients in baking, weigh in grams rather than converting cup volume, since density varies by ingredient.

Read the full guide →

Tool by the Super Simple Digital Tools Team. Reviewed by our editorial team. Free to use, no signup required.