How do I convert between time units like minutes to seconds or hours to minutes?
To convert a time unit, type the duration with its unit (like "90 min" or "2h 15m") and pick the output format you want, such as Second or Minute. The calculator restates the same length of time in the new units. It handles years down to milliseconds, all in one expression.
Converting time units is just restating one length of time in a different unit. Ninety minutes and 5,400 seconds are the same duration written two ways. This calculator does that translation for you: type the value and unit, choose how you want the answer displayed, and read the result. It supports years, months, weeks, days, hours, minutes, seconds, and milliseconds, which makes it useful for audio and video editing, software timing, and any work that crosses unit boundaries.
Step by step
Type the duration with its unit
Enter the value followed by its unit, like "90 min", "3h", or "250 ms". Every number needs a unit. You can also combine units in one line, such as "2h 30m", and the calculator treats the whole thing as a single duration.
Pick the output format
Open the result format picker and choose the unit you want the answer in. Pick "Second" to convert to seconds, "Minute" to convert to minutes, or "Hour" for hours. Multi-unit formats like "Day Hour Minute" break a long duration into parts.
Read the converted result
The result restates your duration in the chosen units. The underlying length never changes, only how it is displayed. Switch the format again at any time to see the same duration in another unit without retyping it.
Scale before converting if needed
Multiply or divide by a plain number first when you need a repeated or split duration, like "250 ms × 8" or "1 day ÷ 4". Then read the result in whatever unit fits, such as Second or Hour.
Worked examples
90 min=5400 SecondsMinutes to seconds: a 90-minute audio mix as a raw second count.
2h 15m=135 MinutesHours and minutes flattened to a single minute total.
3600 sec=1 HourSeconds back up to hours, confirming 3,600 seconds is one hour.
250 ms × 8=2 SecondsEight 250 ms frames scaled up, then read in seconds.
Try it yourself
Type hours, minutes, days, weeks, months, years, or seconds, as full words or shorthand (h m d w), with + - * /. Pick how the answer reads with Show result as up top. It all runs in your browser. Drag the card’s right edge to make it wider.
Common questions
Can I convert milliseconds?
Yes. Type a value in milliseconds using "ms", like "1500 ms", and pick a format such as Second or Minute Second. Milliseconds make this useful for editing and software timing where sub-second precision matters.
Do I have to type a unit on every number?
Yes. Each number needs a unit, so write "90 min" rather than "90". The only exception is the multiplier in × or ÷, where a plain number is expected, like "3h × 2".
Can I convert in both directions?
Yes. The format picker works either way. Enter seconds and read hours, or enter hours and read seconds. The duration stays the same length; only the displayed unit changes.
An audio editor checking that a 90-minute mix equals 5,400 seconds, or a developer reading a 250 ms delay in real time, gets the answer without doing the math by hand.