Decimal Hours Converter

Convert hours and minutes to decimal hours and back, with payroll rounding and a batch timesheet box.

Rounding for decimal hours

Hours and minutes → decimal hours

Time worked (7:30, 7h30m or 45m)

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Total minutes: — · Total seconds: —

Decimal hours → hours and minutes

Decimal hours (e.g. 2.75)

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In words: — · Total minutes: —

Batch: a whole timesheet at once

One time per line (7:30, 7h30m, 45m or a plain number of hours)

Converted lines

Total: — decimal hours · — · 0 entries

Minutes to decimal hours chart

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

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How it works

Decimal hours are just hours + minutes ÷ 60 (plus seconds ÷ 3600). So 7:30 is 7 + 30/60 = 7.50 decimal hours, and 8:20 is 8 + 20/60 = 8.333…, which payroll usually shows as 8.33. Going the other way multiplies the fractional part by 60: 2.75 hours → 0.75 × 60 = 45 minutes, so 2:45. This page converts both directions as you type, and the batch box turns a full timesheet into one column of decimals with a running total.

The rounding menu covers the common payroll conventions: two or three decimals, nearest tenth of an hour (0.1 h = 6 minutes), or nearest quarter hour (0.25 h = 15 minutes), which is what many US employers use. Times can be typed as 7:30, 7:30:45, 7h30m, 45m or a plain number of hours, and a leading minus sign is allowed for corrections. Everything is plain JavaScript running in your browser — no timesheet data leaves your device, there is no sign-up and there are no ads.

Frequently asked questions

How do I convert 7:30 to decimal hours?

Divide the minutes by 60 and add them to the hours: 30 ÷ 60 = 0.5, so 7:30 is 7.50 decimal hours (450 minutes). The converter does this as you type and shows the total in minutes and seconds too.

What is 8:20 in decimal hours?

8 + 20/60 = 8.3333…, which payroll normally writes as 8.33. If your employer rounds to the nearest quarter hour it becomes 8.25, and to the nearest tenth of an hour 8.3 — pick the rounding rule from the menu at the top of the page.

How do I turn decimal hours back into hours and minutes?

Multiply the part after the decimal point by 60: 2.75 hours → 0.75 × 60 = 45 minutes, so 2:45. Paste a whole timesheet into the batch box to convert every line at once and get a total in both decimal hours and HH:MM.