Hours between times, decimal hours & time cards

Decimal Hours Chart

Every minute from 1 to 60, converted to decimal hours — the number a payroll system multiplies by your hourly rate. The rule is minutes ÷ 60, displayed rounded half-up to two decimals.

The ones everyone looks up: 15 minutes = 0.25 · 30 minutes = 0.50 · 45 minutes = 0.75 · 20 minutes = 0.33 · 40 minutes = 0.67 · 6 minutes = 0.10. The full table is below.
MinutesDecimal hours
10.02
20.03
30.05
40.07
50.08
60.10
70.12
80.13
90.15
100.17
110.18
120.20
130.22
140.23
150.25
160.27
170.28
180.30
190.32
200.33
210.35
220.37
230.38
240.40
250.42
260.43
270.45
280.47
290.48
300.50
MinutesDecimal hours
310.52
320.53
330.55
340.57
350.58
360.60
370.62
380.63
390.65
400.67
410.68
420.70
430.72
440.73
450.75
460.77
470.78
480.80
490.82
500.83
510.85
520.87
530.88
540.90
550.92
560.93
570.95
580.97
590.98
601.00

How to read the chart

For a time like 7 hours 45 minutes, take the whole hours as they are (7) and look up the minutes (45 → 0.75): the decimal figure is 7.75 hours. For 7 hours 5 minutes it is 7 + 0.08 = 7.08. Pay is then decimal hours × rate — at $20 an hour, 7.75 hours is $155.00 exactly, which is the point of the conversion.

Two traps and one rounding note

The classic mistakes are writing 15 minutes as 0.15 and 45 minutes as 0.45 — those are clock readings, not decimals: 0.15 hours is actually 9 minutes. The chart exists because the eye wants to copy the minute digits after the point. On rounding: figures here are shown to two decimals, so 25 minutes reads 0.42 rather than 0.41666…. If you are converting a whole week by hand, add the minutes first and convert once — converting each day and adding the rounded decimals can drift a cent or two of an hour across a week. The time card calculator already works that way.

Need the other direction?

The decimal hours converter turns 6.35 hours back into 6 hours 21 minutes and converts hours-and-minutes forward, with the working shown. For clock times rather than lengths — in at 9:15, out at 5:45 — the duration calculator gives the length in all forms at once.

Frequently asked questions

What is 45 minutes in decimal hours?
0.75. Three quarters of an hour. Written as 0.45 it would mean 27 minutes — the single most common timesheet conversion error.
What is 0.25 hours in minutes?
15 minutes: 0.25 × 60 = 15. In the same way 0.1 hours is 6 minutes and 0.5 hours is 30 minutes.
Why is 1 minute 0.02 and not 0.01?
Because 1 ÷ 60 = 0.01666…, which rounds to 0.02 at two decimals. The chart rounds half-up throughout, the standard convention in payroll tables.
Do all employers use two decimals?
No — some systems keep hundredths, others work in tenths (0.1 = 6 minutes) and many apply timesheet rounding to the nearest 5, 6 or 15 minutes before converting. Use the precision your own timesheet asks for.
TimeDuration Pro — coming soon ($9/month). Planned: printable chart packs, tenths (0.1-hour) tables for billing, and rounding-rule presets. The chart above stays free, and Pro is not on sale yet.