Read the guide
Convert minutes to decimal hours
Turn minutes into decimal hours for payroll, split a block of time between clients by percentage, and see what the hours are worth at your rate.
Time Percentage Calculator
Work out a percentage of a length of time, such as 25% of 1 hour 30 minutes, or what percent one length of time is of another. The time percentage calculator takes hours, minutes, and seconds, so there is no need to convert to decimals first.
Runs in your browser. Your data is not uploaded.
How to use the Time Percentage Calculator
- Under Find, pick A percentage of a time or What percent one time is of another.
- For a percentage of a time, enter the percentage and the length of time in hours, minutes, and seconds.
- For a share, enter the part and the whole. Minutes over 59 are fine: 90 minutes counts as 1 hour 30 minutes.
- Read the answer as H:MM:SS, in words, and in decimal hours.
How it works
part = total seconds × P ÷ 100 share = part seconds ÷ whole seconds × 100
Each length of time is turned into seconds first, so 1:30:00 becomes 5,400 seconds. The answer is turned back into hours, minutes, and seconds, rounded to the nearest second for display. Decimal hours are the seconds divided by 3,600.
Examples
- 25% of 1 hour 30 minutes = 0:22:30, which is 22 minutes 30 seconds or 0.375 hours.
- 40 minutes out of an 8-hour day = 8.33%.
- 45 minutes out of an hour = 75%, the same as 0.75 hours on a timesheet.
- 15% of 2 hours = 0:18:00.
Splitting time on a timesheet
Billing one block of time to several clients or projects is a common reason to need this. If 25% of a 1 hour 30 minute call belongs to one client, that client gets 22 minutes 30 seconds, or 0.375 hours. Payroll and invoicing systems usually want decimal hours, so the calculator shows that figure next to the clock-style answer.
Limitations
- The H:MM:SS answer is rounded to the nearest second. The decimal hours keep the exact value.
- It works with lengths of time, not times of day. Find the length between two clock times first, then take the percentage.
Frequently asked questions
What is 25% of 1 hour 30 minutes?
22 minutes 30 seconds. 1 hour 30 minutes is 90 minutes, and 25% of 90 is 22.5.
What percentage of an hour is 45 minutes?
75%. Divide 45 by 60 and multiply by 100.
How do I turn a percentage of an hour into minutes?
Multiply 60 by the percentage and divide by 100. 30% of an hour is 18 minutes.
Related tools
Often used together with Time Percentage Calculator.
Time ConverterConverters
Seconds, minutes, hours, days, weeks, months, and years.
Time Calculator
Adds and subtracts amounts of time, for example 2h 45m + 1h 30m.
Time Duration Calculator
Measures the elapsed time between a start clock time and an end clock time.