Contents
- ๐ What is this?
- ๐จ๐ปโ๐ป How to use it?
- ๐ฐ Examples
- ๐ Nuances
- ๐ค Frequently asked questions
- ๐ Related materials
Show one duration in another unit
Enter a duration in either field and choose two units. The matching value updates immediately, from nanoseconds and milliseconds to weeks and average calendar years.
Convert through seconds
Each unit has a factor measured in seconds. The converter multiplies by the source factor, then divides by the factor of the target unit.
Here t is the duration and k is the number of seconds in one selected unit. A minute is exactly 60 seconds, an hour 3,600 seconds, and a day 86,400 seconds. These relationships match the BIPM SI Brochure.
Three conversions worth checking
A meeting: 90 minutes equals 1.5 hours. The decimal 0.5 hour means another 30 minutes, not 50 minutes.
A video response: 250 milliseconds equals 0.25 seconds. Dividing milliseconds by 1,000 moves to seconds.
A two-week plan: 14 days equals 2 weeks or 336 hours. The quantity stays the same while the number changes with the unit.
A duration is not a calendar date
Seconds, minutes, hours, days, and weeks have fixed factors here. Calendar months vary from 28 to 31 days and calendar years may have 365 or 366 days, so the month and year options use averages: 30.436875 days per month and 365.2425 days per year.
The display keeps up to 12 significant digits and uses scientific notation for extreme values. This avoids turning a tiny nonzero duration into zero, but it cannot make the original measurement more accurate. Use a date calculator when the start and end dates matter.
Questions about time units
The key distinction is whether the task concerns a measured interval or named dates on a calendar.
How many seconds are in an hour?
Exactly 3,600 seconds: 60 minutes multiplied by 60 seconds.
Why is 1.5 hours not 1 hour 50 minutes?
The fractional part is decimal. Half an hour is 0.5 multiplied by 60, which is 30 minutes.
Are months exact in this converter?
No. The month option is an average of 30.436875 days because real calendar months have different lengths.
Can I edit the converted field?
Yes. Both fields work as inputs, and the field changed most recently becomes the source.
Does this handle time zones or daylight saving time?
No. It converts durations only. Time-zone offsets and clock changes require a date-and-time tool.
Similar calculators
You may find the following calculators on the same topic useful:
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- Harmonic mean calculator. Enter positive rates or ratios to see their harmonic mean.
- Arrangements and permutations calculator. Choose how many distinct elements to arrange and get every digit of the answer.
- Improper fraction to mixed number calculator. Enter an integer numerator and positive denominator to see the whole units and simplified remainder.
- Fraction comparison calculator. Enter two integer numerators and positive denominators to compare their values.
- Prime factorization calculator. Enter a nonzero whole number to see its prime factors and their exponents.
- Expected value calculator. Enter each possible outcome and its percentage probability to find the long-run average and spread.
- Time duration calculator. Enter a start and end time to find the net duration, then add more intervals when the time is split.
- Fraction addition calculator. Enter two fractions, choose an operation and get an exact reduced answer.
- Divisors of a number calculator. Enter a positive whole number to see how many divisors it has, then open the complete list.
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