Hours and minutes to decimal converter

Decimal hours without the mental arithmetic

Payroll software, time clocks and invoices usually want time as decimal hours: 7 hours 45 minutes is entered as 7.75, not 7.45. This converter works both ways, for a single duration or a whole column pasted from a timesheet, and shows a chart of minutes 1 to 60 as decimals.

To total hours between start and finish times, use the hours calculator instead.

How to use it

1. Type a duration in “Hours and minutes (h:mm)”: 7:45, 7:45:30, 7h45 or 7 h 45. “Decimal hours” shows 7.75.
2. Or type in “Decimal hours”: 8.6 gives 8:36, that is 8 h 36 min.
3. Pick the “Rounding”: “2 decimal places (0.01 h)”, “nearest tenth (0.1 h = 6 min)” or “nearest quarter hour (0.25 h)”. Only this setting is remembered.
4. The “Minutes” field turns minutes into hundredths of an hour: 20 minutes = 0.33.
5. Under “Batch conversion”, paste one duration per line. The total appears in h:mm and in decimal; “Copy decimal hours” copies the column for your spreadsheet.
6. Optional: an “Hourly rate” multiplies the decimal hours. It is never saved.

The formula

Decimal hours = hours + minutes ÷ 60 + seconds ÷ 3,600. To go back, multiply the part after the decimal point by 60 to get minutes.

• 7:45 → 45 ÷ 60 = 0.75, so 7.75.
• 1:20 → 20 ÷ 60 = 0.3333…, shown as 1.33 with the “exact value” 1.3333… underneath.
• 2:05:15 → 2 + 5 ÷ 60 + 15 ÷ 3,600 = 2.0875, shown as 2.09.
• 8.6 → 0.6 × 60 = 36 minutes, so 8 h 36.
• 7.33 → 7 h 19 min 48 s, not 7 h 20: 7.33 is already rounded.

Batch example: 7:30, 8:15 and 6:50 give 7.50 + 8.25 + 6.83. The total is 22:35, or 22.58 hours. At an hourly rate of 18.50, the amount shown is 22.58 × 18.50 = 417.73.

Minutes to decimal hours chart

The tool shows the same chart and highlights the row for the minutes you are converting. Only 15, 30, 45 and 60 minutes come out exact; the rest are rounded to two places.

Rounding and billing in tenths

Many consultants and law firms bill in tenths of an hour, so each unit is 6 minutes: with “nearest tenth”, 1:20 becomes 1.3. With “nearest quarter hour”, 1:20 becomes 1.25 and 7:50 becomes 7.75. The tool always rounds to the nearest step, never always up or always down. The batch total is rounded from the exact sum: three lines of 0:10 each show 0.17, but the total is 0.50, not 0.51. Check which rule your employer or client uses.

A common mistake is typing 7.30 for half past seven. The tool reads that as 7.3 hours, which is 7 h 18. Type 7:30.

FAQ

How do I convert minutes to decimal?

Divide by 60. 20 minutes = 0.33, 50 minutes = 0.83, 90 minutes = 1.50.

What is 7 hours 45 minutes as a decimal?

7.75. Three quarters of an hour is 0.75 of an hour.

Is the pay figure take-home pay?

No. It is the rounded decimal hours times the rate you entered, before tax, overtime premiums or any deduction.

Are my hours stored anywhere?

No. Only the rounding choice stays on this device. Durations, the batch list and the rate are gone when you close the page and are never sent.