Time Unit Converter
How to use time unit converter
- Enter the numerical duration.
- Choose its current unit.
- Choose the destination unit.
- Read the fixed-duration conversion.
Convert seconds, minutes, hours, days and weeks. Months and years are calendar units rather than fixed durations.
How the result is calculated
The calculator validates the required dates, units and range before producing a result. Keep the inputs and the selected convention with the output so another person can reproduce it.
Read all calculation conventionsHow to read your result
Keep the inputs and conventions beside the answer. These values explain what the result measures.
| Result field | Meaning |
|---|---|
| Converted value | Input scaled by the exact relationship between the selected fixed-duration units. |
| Day convention | One duration day is 24 hours; a calendar-day interval can answer another question. |
| Precision | Displayed decimals may be rounded; keep the original input and units for exact reproduction. |
Decimal hours convert to minutes
8.5 hours × 60 = 510 minutes. The decimal half-hour is 30 minutes.
Try the example in the calculator above. Change one input at a time and compare the target, interval and selected rules. For a longer explanation read Elapsed Time Calculations: Hours, Minutes, Seconds and Overnight Ranges.
Conventions to keep with your result
Seconds, minutes, hours, fixed 24-hour days and seven-day weeks are duration units. Calendar months and years need actual dates and are not fixed-unit conversions.
Time Unit Converter: frequently asked questions
Why are months absent?
Their length depends on the calendar dates involved.
Is a converted day always 24 hours?
Yes in this duration mode. A local calendar day near a clock change can differ.
Does 1.5 hours mean 90 minutes?
Yes. Half an hour is 30 minutes.
Learn the method
All guidesElapsed Time Calculations: Hours, Minutes, Seconds and Overnight Ranges
Calculate an exact duration and avoid confusing overnight times with calendar-day totals.
Add and Subtract Durations: Hours, Minutes, Seconds and Decimal Totals
Add or subtract elapsed amounts without treating minutes as decimals or wrapping at midnight. Includes carries, borrowing, negative totals and conversion checks.
Keep exploring
View the tool libraryDays Between Dates
Compare two dates with calendar days, complete weeks and weekday counts. Choose whether to include the end date.
Business Days Calculator
Count working days using your weekend pattern and optional excluded dates. Public holidays are excluded only when entered.
Day of the Week
Inspect a Gregorian date, leap-year rules, ISO week numbers and a printable month calendar.
Time Zone Converter
Convert an exact UTC instant to another IANA time zone.