Quick answer: Divide the minutes by 60 and add the whole hours. 7 hours 45 minutes = 7 + 45 ÷ 60 = 7.75 decimal hours. For a week, add up all the minutes first and convert once to avoid rounding drift.
How to convert time to decimal hours
decimal hours = hours + minutes ÷ 607 h 45 min → 7 + 0.75 = 7.75Clocks count in sixties while decimals count in tens. The instinct is to read 7:45 and write 7.45, but 0.45 of an hour is 27 minutes, not 45.
Payroll wants decimals because pay is a multiplication. You cannot multiply 7 hours 45 minutes by a rate, but 7.75 × $22 = $170.50 is one step. Law firms, agencies and contractors invoice in decimal hours for the same reason.
Minutes to decimal reference table
These values repeat every hour. The quarter hours, 0.25, 0.50 and 0.75, cover most rounded timesheet entries, and 6 minutes being exactly 0.10 is why tenth-of-an-hour billing exists.
| Min | Dec | Min | Dec | Min | Dec |
|---|---|---|---|---|---|
| 1 | 0.02 | 21 | 0.35 | 41 | 0.68 |
| 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 | 40 | 0.67 | 59 | 0.98 |
| 20 | 0.33 | 42 | 0.70 | 60 | 1.00 |
Worked example: a week of shifts
Mon 8:15, Tue 7:50, Wed 8:00, Thu 6:40, Fri 8:25 at $22 per hour
- Total the minutes: 495 + 470 + 480 + 400 + 505 = 2,350 minutes
- Convert once: 2,350 ÷ 60 = 39.1667 hours
- Pay: 39.1667 × $22 = $861.67
Result: 39.17 hours, $861.67
Multiplying the displayed 39.17 by $22 gives $861.74, seven cents more. Tiny once, but the same drift repeats across every employee, which is why payroll systems total raw minutes and convert at the end.
Payroll rounding and the 7-minute rule
Many employers round each entry to the nearest quarter hour. Under the 7-minute rule, 1 to 7 minutes past a quarter round down and 8 to 14 minutes round up.
| Minutes past the quarter | Rounds | Effect |
|---|---|---|
| 1 to 7 | Down | Employee loses up to 7 min |
| 8 to 14 | Up | Employee gains up to 7 min |
Under the Fair Labor Standards Act rounding is only allowed if it is neutral over time and does not favour the employer. Rounding clock-ins up and clock-outs down is not compliant, and several states, California in particular, are stricter.
If you set payroll policy: Timekeeping software now records exact minutes, so the original reason for rounding has mostly gone. Paying actual recorded time is the safest policy.
The 7.45 mistake, and what it costs
Someone works 7 hours 45 minutes and types 7.45. The correct figure is 7.75, so 0.30 of an hour, or 18 minutes, goes unpaid.
What that adds up to
- 18 minutes a day × 5 days = 1.5 hours a week
- Over 48 working weeks: 72 hours
- At $22 an hour: $1,584 of unpaid time a year
Result: $1,584 lost to one typing habit
A quick check: if the digits after the point are above 59 the entry is certainly wrong. If they look like the minutes worked, they are probably wrong too.
Converting decimal hours back to minutes
minutes = decimal part × 606.25 h → 6 hours and 0.25 × 60 = 15 minThis is the check to run on any timesheet you approve. A 7.45 entry reverses to 7 h 27 min, so if the shift was really 7 h 45 min the error shows up at once. The decimal to time converter does this for you.
Common mistakes with decimal time
- Reading the decimal as minutes. 7.45 is 7 h 27 min, not 7 h 45 min.
- Rounding each entry before totalling. Round once at the end, if at all.
- Truncating instead of rounding. 0.6666 is 0.67, not 0.66.
- Mixing formats in one sheet. Keep every row in the same format.
- Assuming rounding is always legal. It must be neutral over time, and some states are stricter.
Frequently asked questions
How do I convert minutes to decimal hours?
Divide the minutes by 60 and add the whole hours. 45 minutes is 45 ÷ 60 = 0.75, so 7 hours 45 minutes is 7.75 decimal hours.
Why does payroll use decimal hours?
Pay is hours multiplied by rate, and hours and minutes cannot be multiplied by a rate directly. Converting to 7.75 first makes it one step: 7.75 × $22 = $170.50.
What is the 7-minute rule for timesheets?
A US practice of rounding time to the nearest quarter hour, where 1 to 7 minutes round down and 8 or more round up. Under the Fair Labor Standards Act it is allowed only if rounding is neutral over time and does not favour the employer.
Is 1.5 hours the same as 1 hour 50 minutes?
No. 1.5 hours is 1 hour 30 minutes. 1 hour 50 minutes is 1.83 hours. Reading the decimal part as minutes is the most common error in decimal time.
Should I round each day or the weekly total?
Total the raw minutes for the week and convert once. Rounding every day first adds small errors that build up across a payroll run.
How many decimal hours is 20 minutes?
20 ÷ 60 = 0.3333, shown as 0.33. Payroll systems keep the raw minutes and convert at the end so these small differences do not add up.
Related tools
Accuracy note: This calculator is for general estimation and is not payroll, tax or legal advice. Rounding rules and wage laws vary by state and country, so confirm your obligations with a payroll professional before setting policy.
Content Lead, Anchor AI Tools, California, USA. Spotted an error? Email hello@anchoraitools.com and it will be checked and corrected. See our editorial standards.