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Time to Decimal Calculator
Convert hours, minutes and seconds into decimal hours — the form used on timesheets, invoices and payroll. You also get the value rounded to the nearest quarter hour and tenth of an hour.
- Decimal minutes
- 465
- Total seconds
- 27,900
- Rounded to nearest quarter hour
- 7.75
- Rounded to nearest tenth (6 min)
- 7.8
Saved setups
Save a set of inputs you reuse — your usual rate, your loan, your room sizes — and load it back in one tap.
Your recent calculations
Results you calculate here are kept on this device so you can come back to them.
Formula
Decimal hours = hours + minutes ÷ 60 + seconds ÷ 3600
Decimal minutes = hours × 60 + minutes + seconds ÷ 60
How to use it
- Enter hours, minutes and seconds.
- Read the decimal hours, or the rounded figure your payroll uses.
Worked examples
7 hours 45 minutes
- Decimal hours
- 7.75
- Decimal minutes
- 465
- Total seconds
- 27,900
2 hours 10 minutes 30 seconds
- Decimal hours
- 2.175
- Rounded to nearest quarter hour
- 2.25
- Rounded to nearest tenth (6 min)
- 2.2
Minutes as decimals
5 min = 0.08. 6 min = 0.1. 10 min = 0.17. 15 min = 0.25. 20 min = 0.33. 30 min = 0.5. 40 min = 0.67. 45 min = 0.75. 50 min = 0.83. Law firms and consultancies commonly bill in tenths of an hour, which are 6-minute blocks.
Questions people ask
What is 7 hours 45 minutes as a decimal?
7.75 hours, because 45 minutes is three quarters of an hour.
Is 7.5 hours the same as 7:50?
No. 7.5 hours is 7 hours 30 minutes. 7 hours 50 minutes is 7.83 decimal hours.
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