Time to Decimal Calculator

Convert hours, minutes and seconds to decimal hours for timesheets and payroll, or convert decimal hours back to hours and minutes. Example: 8 hours 45 minutes is 8.75 decimal hours, and 7.25 is 7 hours 15 minutes.

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Convert

Hours

Minutes

Seconds

Decimal hours (for the second mode)

How to use the Time to Decimal Calculator

Choose time to decimal, or decimal to time.
Enter the hours, minutes and seconds, or the decimal hours.
Press Calculate.

Formula and method

Decimal hours = hours + minutes / 60 + seconds / 3600. To go back, multiply the decimal part by 60 to get minutes.

Worked example: 8 hours 45 minutes

Step	Result
45 / 60	0.75
8 + 0.75	8.75 hours

Minutes to decimal hours chart

Minutes	Decimal hours
5	0.08
10	0.17
15	0.25
20	0.33
25	0.42
30	0.50
35	0.58
40	0.67
45	0.75
50	0.83
55	0.92
60	1.00

Why decimals

Payroll and billing multiply hours by a rate, which is easier with decimals: 8.75 hours at $20 is $175. Using 8:45 directly would give the wrong answer.

Frequently asked questions

How do I convert time to decimal hours?

Divide the minutes by 60 and add to the hours.

What is 8:30 as a decimal?

8.5.

What is 15 minutes as a decimal?

0.25 hours.

How do I convert decimal hours to minutes?

Multiply the decimal part by 60.

What is 7.75 hours in hours and minutes?

7 hours 45 minutes.

Why do timesheets use decimals?

They make pay calculations simple.

Sources

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Effortless Math Team

13 minutes ago