Minute to Decimal to Hours Calculator Conversion Chart
To convert minutes to decimal hours, divide the minutes by 60 and add the result to the whole hours. So 7 hours 45 minutes is 7 + 45 ÷ 60 = 7.75 hours, and 2 hours 20 minutes is 2.33 hours. The chart below lists every minute from 1 to 60, so you can convert without a calculator.
This page is for payroll administrators, managers approving timesheets, and contractors billing by the hour who need accurate numbers quickly.
Key takeaways
- Formula: decimal hours = whole hours + (minutes ÷ 60).
- Minutes are fractions of 60, not 100. 45 minutes is 0.75 hours, not 0.45.
- Quarter hours are 0.25, 0.50 and 0.75. Six-minute increments are 0.1, 0.2, 0.3 and so on.
- Pick one rounding rule, document it, and apply it everywhere.
- Under federal wage and hour rules, rounding is accepted only if it doesn't shortchange employees over time.
Why convert minutes to decimal hours?
Most payroll systems, billing tools and project trackers expect hours in decimal form. An employee who works 7 hours 45 minutes needs that entered as 7.75, not 7:45. A contractor who spends 2 hours 20 minutes on a job invoices 2.33 hours. Pay, overtime and invoice totals are calculated by multiplying decimal hours by a rate, so the conversion has to be right before any of that math works.
The error we see most often is reading the minutes as if they were already a decimal. Someone sees 7:30 on a timesheet and types 7.30. That's 12 minutes short of the real 7.50 hours, and the mistake repeats every time the same habit is used.
Minute to decimal hours conversion chart
Each value is minutes ÷ 60, rounded to two decimal places.
| Min | Hours | Min | Hours | Min | Hours |
|---|---|---|---|---|---|
| 1 | 0.02 | 21 | 0.35 | 41 | 0.68 |
| 2 | 0.03 | 22 | 0.37 | 42 | 0.70 |
| 3 | 0.05 | 23 | 0.38 | 43 | 0.72 |
| 4 | 0.07 | 24 | 0.40 | 44 | 0.73 |
| 5 | 0.08 | 25 | 0.42 | 45 | 0.75 |
| 6 | 0.10 | 26 | 0.43 | 46 | 0.77 |
| 7 | 0.12 | 27 | 0.45 | 47 | 0.78 |
| 8 | 0.13 | 28 | 0.47 | 48 | 0.80 |
| 9 | 0.15 | 29 | 0.48 | 49 | 0.82 |
| 10 | 0.17 | 30 | 0.50 | 50 | 0.83 |
| 11 | 0.18 | 31 | 0.52 | 51 | 0.85 |
| 12 | 0.20 | 32 | 0.53 | 52 | 0.87 |
| 13 | 0.22 | 33 | 0.55 | 53 | 0.88 |
| 14 | 0.23 | 34 | 0.57 | 54 | 0.90 |
| 15 | 0.25 | 35 | 0.58 | 55 | 0.92 |
| 16 | 0.27 | 36 | 0.60 | 56 | 0.93 |
| 17 | 0.28 | 37 | 0.62 | 57 | 0.95 |
| 18 | 0.30 | 38 | 0.63 | 58 | 0.97 |
| 19 | 0.32 | 39 | 0.65 | 59 | 0.98 |
| 20 | 0.33 | 40 | 0.67 | 60 | 1.00 |
For everyday use, the values you'll need most are the quarter hours: 15 minutes = 0.25, 30 minutes = 0.50, 45 minutes = 0.75 and 60 minutes = 1.00. Many schedules and payroll setups work in 15-minute increments, so those four values cover a lot of daily entries.
How do you convert minutes to decimal hours by hand?
- Separate the whole hours from the minutes. For 3:22, that's 3 hours and 22 minutes.
- Divide the minutes by 60: 22 ÷ 60 = 0.3667.
- Add the result to the hours: 3 + 0.3667 = 3.3667.
- Round using your organization's rule. To two decimal places, that's 3.37 hours.
More examples:
- 8 hours 48 minutes: 8 + (48 ÷ 60) = 8 + 0.80 = 8.80 hours.
- 1 hour 5 minutes: 1 + (5 ÷ 60) = 1 + 0.083 = 1.08 hours.
- 0 hours 50 minutes: 50 ÷ 60 = 0.83 hours.
Converting decimal hours back to minutes
Reverse the process: multiply the decimal part by 60. For 4.67 hours, 0.67 × 60 = 40.2, so about 4 hours 40 minutes. This is handy when stored decimal values need to appear on a printed schedule or timesheet in hours and minutes.
What about seconds?
If a record includes seconds, convert them to a fraction of a minute first. For 2 hours 15 minutes 30 seconds: 30 ÷ 60 = 0.5 minutes, so 15.5 minutes. Then 15.5 ÷ 60 = 0.258, giving 2.258 hours. Many payroll processes work to the nearest minute, but systems that track seconds need to handle this step consistently.
Common conversion errors and what they cost
Treating minutes as decimals
Entering 7 hours 30 minutes as 7.30 instead of 7.50 underpays the shift. At $25 an hour, 7.30 hours pays $182.50 while the correct 7.50 hours pays $187.50, a $5 gap on one shift. Repeat that across a team and a pay period and the total adds up quickly, along with the work of correcting it later. Our article on the hidden cost of manual timesheet adjustments looks at why these fixes are so expensive.
Inconsistent rounding
Some teams round to two decimals, some to four, and some to the nearest quarter hour. Mixing rules across departments or pay periods creates reconciliation problems. Choose one rule, write it down and configure your systems to match it.
Untracked edits
Manual conversions often lead to manual edits. If someone changes a total, there should be a record of who changed it and why. See timecard edits and punch corrections for audit trail controls.
Is rounding employee time legal?
Under the federal Fair Labor Standards Act, the US Department of Labor's regulation at 29 CFR 785.48(b) recognizes the common practice of rounding start and stop times, for example to the nearest 5 minutes, tenth of an hour or quarter hour. The regulation presumes this "averages out" so employees are paid for all the time they actually work. The Department will accept rounding for enforcement purposes only if it doesn't result, over time, in employees being undercompensated.
In practice, that means:
- Round in both directions (to the nearest increment), not always in the employer's favor.
- Check periodically that rounded hours aren't consistently lower than actual hours.
- Remember that some states have their own rules, so confirm what applies where you operate.
Breaks matter too. The DOL says short rest periods, usually 20 minutes or less, are customarily paid as working time, while bona fide meal periods, typically 30 minutes or more, generally don't need to be paid if the employee is completely relieved from duty.
Decimal hours in payroll, billing and workforce planning
Payroll. Time systems usually calculate elapsed time from punches and store it as decimal hours, which then feed weekly totals, overtime and gross pay. If you work from paper timesheets, the conversion happens when the administrator keys hours in, which is where errors creep in. For the full process from punches to totals, see how to calculate time clock work hours, and for Workday users, time tracking strategies in Workday.
Professional billing. Many law firms and consultants bill in tenths of an hour (6-minute units). A task that takes 2 hours 18 minutes is billed as 2.3 hours. Others bill in quarter hours, so 2 hours 22 minutes might become 2.25 or 2.50 depending on the firm's rule. Put your billing increment and rounding rule in client agreements so there are no surprises.
Labor cost and planning. Budgets and forecasts work best when everything uses the same format. A line that ran 18.75 hours with 12 workers at $45 an hour costs 18.75 × $45 × 12 = $10,125. Comparing 238.5 actual hours against a 240-hour budget is easy in decimals and awkward in mixed hours and minutes.
Quick reference by increment
| Increment | Common use | Minutes = decimal hours |
|---|---|---|
| 6 minutes | Legal and consulting billing | 6 = 0.1, 12 = 0.2, 18 = 0.3, 24 = 0.4, 30 = 0.5, 36 = 0.6, 42 = 0.7, 48 = 0.8, 54 = 0.9 |
| 10 minutes | Some scheduling tools | 10 = 0.17, 20 = 0.33, 30 = 0.50, 40 = 0.67, 50 = 0.83 |
| 15 minutes | Payroll and shift scheduling | 15 = 0.25, 30 = 0.50, 45 = 0.75 |
Print the increments your organization actually uses and give them to anyone who enters time by hand. Then set your time system's rounding rules to match, so manual and automated totals agree.
Frequently asked questions
What is 45 minutes in decimal hours?
45 minutes is 0.75 hours, because 45 ÷ 60 = 0.75. It is not 0.45. So 7 hours 45 minutes becomes 7.75 hours on a timesheet. The same logic applies to any minute value: divide by 60, not 100. Quarter-hour marks are the easiest to remember: 0.25, 0.50 and 0.75.
How do I convert 8 hours 20 minutes to decimal?
Divide 20 by 60 to get 0.333, then add the 8 whole hours for 8.33 hours rounded to two decimal places. If your organization rounds to the nearest quarter hour, 20 minutes rounds to 15 minutes, giving 8.25 hours. Follow whatever rounding rule your payroll policy documents.
Can employers round time to the nearest 15 minutes?
Under federal rules, rounding to the nearest quarter hour is generally accepted if it averages out so employees are paid for all time actually worked. A system that always rounds down, or consistently favors the employer, risks underpayment. Some states have stricter requirements, so check local law and review rounded hours against actual punches periodically.
What to do next
- Bookmark the chart above or print the increment table for anyone who enters time manually.
- Write down your organization's rounding rule and confirm every system uses it.
- Spot-check a recent pay period for timesheets where minutes were typed as decimals.
- Compare rounded hours against actual punch times to confirm rounding isn't consistently shorting employees.
Last reviewed: October 2026.
Sources
- 29 CFR 785.48, Use of time clocks, Electronic Code of Federal Regulations
- Fact Sheet #22: Hours Worked Under the Fair Labor Standards Act, U.S. Department of Labor
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