Minute Time Calculator
Time Conversion Calculator works out Hours (decimal) and Hours to the nearest hundredth (payroll) from What you are converting from, Minutes and Hours. The default figures on this page give clock form (h:mm:ss) of 1:30:00; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
3 steps
- Input read as 90 minutes, which is 5400 seconds.
- 5400 s / 60 = 90 min; / 3600 = 1.5 h; / 86400 = 0.0625 d.
- Splitting the total: 1 whole hour, 30 minutes and 0 seconds.
Its 6 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
3 sources
What the Time Conversion Calculator calculates
Converts a length of time between clock form (h:mm:ss) and decimal hours, minutes, seconds and days, in either direction: 90 minutes is 1 hour 30 minutes and 1.5 decimal hours, and 7:45 on a timesheet is 7.75 hours. Conversions are the exact SI-accepted ones (1 h = 3600 s), and a two-part value such as 7:45 is read as hours and minutes or as minutes and seconds according to the chosen reading.
How to use this Time Conversion Calculator
Enter What you are converting from, Minutes, Hours and Seconds. Hours (decimal) updates as you type, and “Use a worked example” loads checked figures you can adjust. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Hours (decimal), Hours to the nearest hundredth (payroll) and Minutes.
The method follows BIPM, The International System of Units (SI Brochure), 9th edition, Table 8: non-SI units accepted for use with the SI, ISO 8601-1:2019, clause 5.5, representation of durations and of time of day and US Department of Labor, Wage and Hour Division Fact Sheet #21 (recordkeeping) and 29 CFR 785.48(b).
90 minutes is 1 hour 30 minutes example
With What you are converting from: minutes, Minutes: 90, the calculator returns Whole hours: 1, Minutes left over: 30, Hours (decimal): 1.5. This example is checked against an independent source in the test suite.
What you can compare
Change one input at a time to see how it affects Hours (decimal), Hours to the nearest hundredth (payroll) and Minutes. The inputs you can vary are What you are converting from, Minutes, Hours, Seconds, Days and Clock value.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How do I calculate hours from minutes?
Converts a length of time between clock form (h:mm:ss) and decimal hours, minutes, seconds and days, in either direction: 90 minutes is 1 hour 30 minutes and 1.5 decimal hours, and 7:45 on a timesheet is 7.75 hours. Open “How this is worked out” beside the result to see each step for your own figures.
How do I convert time to hours?
It needs What you are converting from, Minutes, Hours, Seconds, Days and Clock value. Nothing else is required, and the figures stay in your browser.
How to calculate time in hours and minutes?
The result gives Hours (decimal), Hours to the nearest hundredth (payroll), Minutes, Seconds, Days and Whole hours, each labelled with its unit so the figure can be read on its own.
How to calculate hours from a time clock?
The page opens with worked default figures: clock form (h:mm:ss) of 1:30:00. Replace them with your own and every figure updates as you type.
How to calculate time by the minute?
A checked example is built in: Hours (decimal): 1.5. It is recomputed on every release, so the method on this page is tested rather than asserted.
What information do I need for the Time Conversion Calculator?
You need What you are converting from, Minutes, Hours, Seconds, Days, Clock value, A value like 7:45 means and Answer to feature. The page opens with default figures that give clock form (h:mm:ss) of 1:30:00, so you can see the scale before entering your own.