Minutes to Decimal Hours: The Payroll Conversion Chart

The formula

decimal hours = hours + (minutes ÷ 60)
7 + (38 ÷ 60) = 7 + 0.6333 = 7.63

Reverse it by multiplying the decimal portion by 60: 7.63 hours → 0.63 × 60 = 38 minutes.

The full conversion chart

Min	Decimal	Min	Decimal	Min	Decimal
5	0.08	25	0.42	45	0.75
6	0.10	30	0.50	48	0.80
10	0.17	35	0.58	50	0.83
12	0.20	36	0.60	55	0.92
15	0.25	38	0.63	54	0.90
20	0.33	40	0.67	60	1.00

The four to memorise: 15 min = 0.25 · 30 min = 0.50 · 45 min = 0.75 · 6 min = 0.10. Everything else you can interpolate between them.

Add shifts and convert in one step.Time calculator →

What the mistake actually costs

Suppose you work 7 hours 38 minutes at $22 an hour.

Entry	Hours used	Pay
Correct decimal	7.63	$167.93
Typed as 7.38	7.38	$162.36
Difference	0.25 h	−$5.57

Five dollars looks trivial. Repeat it across 250 working days and it is $1,392 a year — from a single misplaced decimal point.

Annual gap at $22/hour, 250 shifts

Correct$41,983

Mistyped$40,590

Rounding rules

Many US employers round to the nearest quarter-hour under the 7-minute rule: within any 15-minute block, minutes 1–7 round down and 8–14 round up.

Clocked	Rounds to	Decimal
8:07	8:00	8.00
8:08	8:15	8.25
8:22	8:15	8.25
8:23	8:30	8.50

Rounding is only lawful if applied neutrally over time. A system that always rounds clock-ins up and clock-outs down is not rounding — it is unpaid work, and it is the most common wage-and-hour claim there is.

Adding shifts without errors

Convert first, then add. A week of 7:45, 8:15, 6:30, 8:00 and 7:38 becomes 7.75 + 8.25 + 6.50 + 8.00 + 7.63 = 38.13 hours. Try that in hours and minutes and the carrying at 60 rather than 100 is where mistakes creep in.

Once you have accurate hours, converting your rate to an annual figure takes one multiplication — and the deductions explain the gap between that and your bank balance.

Run your own numbers

Time Salary Paycheck / Payroll Tax Minutes to decimal hours

FAQ

How do I convert minutes to decimal hours?

Divide the minutes by 60. So 38 minutes ÷ 60 = 0.633, making 7 hours 38 minutes equal to 7.63 decimal hours. To go back the other way, multiply the decimal part by 60.

What is 45 minutes in decimal hours?

0.75 hours. The quarter-hour marks are the ones worth memorising: 15 minutes is 0.25, 30 minutes is 0.5, and 45 minutes is 0.75.

Why can I not just write 7.38 for 7 hours 38 minutes?

Because an hour has 60 minutes, not 100. Writing 7.38 tells the system 7 hours and 22.8 minutes — you would lose about 15 minutes of pay on that shift alone, which is over 60 hours across a year of daily shifts.

What is the 7-minute rounding rule?

A US practice permitted under the Fair Labor Standards Act allowing time to be rounded to the nearest quarter-hour: minutes 1–7 past a quarter round down, 8–14 round up. It must be applied neutrally so it does not systematically favour the employer.

How do I add up several shifts?

Convert each shift to decimal hours first, then add. Adding times in hours-and-minutes form invites carrying errors — 3:45 plus 4:30 is 8:15, not 7:75. Decimals remove the problem entirely.

Sources

Primary references used for the figures and rules on this page.

Fact Sheet #21: Recordkeeping Requirements under the FLSA — U.S. Department of Labor
Fact Sheet #22: Hours Worked under the FLSA — U.S. Department of Labor