Hours and Minutes to Decimal Converter (With Chart)

Minutes	Decimal
1 min	0.02
5 min	0.08
6 min	0.1
10 min	0.17
12 min	0.2
15 min	0.25
18 min	0.3
20 min	0.33
24 min	0.4
25 min	0.42
30 min	0.5
35 min	0.58
36 min	0.6
40 min	0.67
42 min	0.7
45 min	0.75
48 min	0.8
50 min	0.83
54 min	0.9
55 min	0.92
60 min	1

How to convert minutes to decimal hours

Divide the minutes by 60. 45 minutes is 45 ÷ 60 = 0.75 hours, so 7 hours 45 minutes is 7.75 hours. A common mistake is to write 7.45, which is actually 7 hours 27 minutes.

How to convert decimal hours back

Take the part after the decimal point and multiply it by 60. For 3.4 hours, 0.4 × 60 = 24, so it is 3 hours 24 minutes.

Why invoices use decimal hours

Multiplying is easy with decimals: 7.75 hours at $80 is $620. Doing the same with 7:45 means converting first, and that is where billing mistakes happen. Many freelancers also round to the nearest 6 minutes (0.1 hour) or 15 minutes (0.25 hour). Agree on rounding with your client up front.

Questions

What is 15 minutes in decimal?

0.25 hours. 30 minutes is 0.5 and 45 minutes is 0.75.

What is 20 minutes in decimal?

0.33 hours (20 ÷ 60 = 0.333…). 40 minutes is 0.67.

How do I bill in 6 minute increments?

Six minutes is 0.1 of an hour, so each 6 minute block is one tenth. Round each entry up to the next tenth: 14 minutes becomes 0.3 hours.

Can a time tracker do this for me?

Yes. Sheaf records time as you work and shows hours as decimals on reports and invoices, with optional rounding to 6, 10, 15, 30 or 60 minutes. Free during beta.

Let the timer do the math

Sheaf tracks your time, applies the rounding you choose and puts decimal hours straight onto the invoice. Free during beta.

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Convert hours and minutes to decimal