Calculate minutes between two times, convert minutes to decimal hours, convert decimal hours back to minutes, and compare exact time with common payroll rounding increments.
Choose a mode, enter your values, and press Calculate.
To calculate minutes between two clock times, convert both times to minutes after midnight and subtract.
For example, 8:01 AM is 8 times 60 plus 1, which equals 481 minutes after midnight. 8:13 AM is 8 times 60 plus 13, which equals 493 minutes after midnight. The difference is 493 minus 481, which equals 12 minutes. So 8:01 AM to 8:13 AM equals 12 minutes.
The highlighted 12-minute arc runs from the 1-minute mark to the 13-minute mark on the clock face.
| Time | Minutes After Midnight |
|---|---|
| 8:01 AM | 481 |
| 8:13 AM | 493 |
| Difference | 12 minutes |
This mode is useful when you only worked a short period, waited for something, timed a task, or need to know the exact minute difference without calculating a full work shift.
Divide the minutes by 60.
Example: 15 ÷ 60 = 0.25. So 15 minutes equals 0.25 hours.
Thirty minutes: 30 ÷ 60 = 0.50. Forty-five minutes: 45 ÷ 60 = 0.75.
15 minutes is one-quarter of an hour, 30 minutes is one-half, 45 minutes is three-quarters, and 60 minutes is one whole hour.
| Minutes | Fraction of an Hour | Decimal Hours |
|---|---|---|
| 15 | 1/4 | 0.25 |
| 30 | 1/2 | 0.50 |
| 45 | 3/4 | 0.75 |
| 60 | 1 | 1.00 |
The same 0 to 60 minute scale lines up with 0.00 to 1.00 decimal hours.
| Minutes | Decimal Hours |
|---|---|
| 0 | 0.00 |
| 15 | 0.25 |
| 30 | 0.50 |
| 45 | 0.75 |
| 60 | 1.00 |
These values are exact. Other minute totals produce repeating decimals.
Use 37 ÷ 60 = 0.616666...
So 37 minutes is exactly 37/60 of an hour, and approximately 0.6167 hours to four decimals, or 0.62 hours to two decimals.
0.62 is the decimal-hour value rounded to two decimal places. It does not mean the clock itself has been rounded to a different number of minutes.
| Precision | Value |
|---|---|
| Exact fraction | 37/60 hours |
| Decimal | 0.616666... |
| Four decimal places | 0.6167 |
| Two decimal places | 0.62 |
It is important to distinguish conversion from rounding. 0.62 is the decimal-hour value rounded to two decimal places. It does not mean the clock itself has been rounded to a different number of minutes.
Because an hour contains 60 minutes, not 100. Fifteen minutes is 15/60 = 1/4 = 0.25. The digits after the decimal represent a fraction of one hour. They do not represent clock minutes.
That is why 0.50 hour = 30 minutes, not 50 minutes. And 0.75 hour = 45 minutes, not 75 minutes.
Multiply by 60. 0.25 × 60 = 15 minutes.
Other common values: 0.10 × 60 = 6 minutes. 0.20 × 60 = 12 minutes. 0.50 × 60 = 30 minutes. 0.75 × 60 = 45 minutes. 1.25 × 60 = 75 minutes = 1 hour, 15 minutes.
Keep the whole hours. Convert only the leftover minutes.
Example: 7 hours, 37 minutes. 37 ÷ 60 = 0.616666... Add the seven whole hours: 7 + 0.616666 = 7.616666...
Do not write 7.37, because 7.37 hours is a different duration.
Multiplying pay by decimal hours is straightforward. Suppose 37 minutes worked at an hourly rate of $20. Convert time: 37/60 = 0.616666 hours. Multiply: 0.616666 × $20 = about $12.33.
A clock-style value such as 0:37 cannot simply be multiplied as .37 hours because .37 hours equals only 22.2 minutes.
Some timekeeping systems round clock punches or work time to a fixed increment. Federal regulation 29 CFR 785.48 discusses longstanding practices of recording start and stop times to the nearest five minutes, one-tenth of an hour, or quarter hour.
The regulation accepts such practices for enforcement purposes only when the practice does not result, over time, in employees failing to be properly compensated for all time actually worked.
That is why CalculateThisWay must show exact time first. Rounding is an optional comparison. It should never silently change the user's minutes.
Quarter-hour rounding uses 15-minute increments: :00, :15, :30, :45.
Under ordinary nearest-quarter mathematical rounding, times closest to :00 round to :00, times closest to :15 round to :15, and so on. A common breakpoint table is:
Example nearest-quarter rounding. Each minute range maps to its nearest 15-minute mark.
| Minute Range | Rounds To |
|---|---|
| :00 through :07 | :00 |
| :08 through :22 | :15 |
| :23 through :37 | :30 |
| :38 through :52 | :45 |
| :53 through :59 | next hour |
This is sometimes informally called the "7-minute rule." However, federal law does not create a separate statute with that name. The underlying regulation addresses permissible time-clock rounding and requires that employees remain properly compensated over time.
Exact: 37 minutes. Decimal: 37 ÷ 60 = 0.6167 hours. Two-decimal display: 0.62. Nearest quarter hour: 30 minutes = 0.50 hours. Difference: 7 minutes less than the exact time.
Now compare 38 minutes. Exact: 38. Nearest quarter: 45 = 0.75. Difference: 7 minutes more.
This demonstrates the idea behind neutral nearest-increment rounding. It does not determine whether a particular employer's practice complies with applicable law.
One-tenth of an hour is 60 ÷ 10 = 6 minutes.
| Decimal Tenth | Minutes |
|---|---|
| 0.0 | 0 |
| 0.1 | 6 |
| 0.2 | 12 |
| 0.3 | 18 |
| 0.4 | 24 |
| 0.5 | 30 |
| 0.6 | 36 |
| 0.7 | 42 |
| 0.8 | 48 |
| 0.9 | 54 |
| 1.0 | 60 |
That is why a payroll system that rounds to tenths of an hour uses six-minute increments.
These are different operations.
37 minutes = 37/60 = 0.6167 hours. Nothing about the actual worked time changed.
0.6167 → 0.62. Again, the underlying time is still 37 minutes.
37 minutes → 30 minutes under nearest-quarter rounding. Now the time itself has been mapped to a different increment.
CalculateThisWay keeps those three concepts visually separate.
Federal regulations recognize certain rounding practices under specific conditions. However, federal rules are not the only rules that may matter. State law, local law, court decisions, contracts, and employer policies can affect what is permitted.
This page does not tell a worker "your employer's rounding is legal." It explains the federal rule and calculates the numerical effect. For a wage dispute or legal decision, consult the applicable official labor agency or a qualified professional.
Use Minute Calculator for: 12 minutes between times, 37 minutes as decimal hours, .25 hours into minutes, quarter-hour rounding examples.
Use Hours Calculator for: an entire shift, lunch breaks, weekly totals, overtime, gross pay.
Use Time Calculator for: general time addition and subtraction, clock arithmetic, seconds.
Minute math becomes much easier once you remember: 60 minutes = 1 hour.
To convert minutes to decimal hours: divide by 60. To convert decimal hours to minutes: multiply by 60.
And when payroll rounding is involved, keep exact conversion separate from rounding policy. CalculateThisWay always shows the exact time first so you can see what actually happened before comparing any rounded value.
The examples below use the exact same calculation engine as the calculator above. Values are computed live in JavaScript rather than typed in as fixed text, so they always match what the calculator itself returns for these inputs.
37 minutes worked at an hourly rate of $20, compared under nearest quarter-hour rounding.
What is the exact decimal-hour value, and what does it round to under nearest-quarter-hour rounding?
Exact: 37 minutes = 0.6167 decimal hours (0.62 rounded to two decimals), for a gross pay of about $12.33. Under nearest-quarter-hour rounding, 37 minutes rounds to 30 minutes, or 0.50 decimal hours.
I want minutes between two times, decimal-hour conversion, or a payroll rounding comparison.
I want a full shift, weekly total, overtime, or gross pay.
I want to add or subtract clock time, including seconds.
I want the number of days between two dates, or a future or past date.
Convert both clock times to minutes after midnight, then subtract the earlier value from the later one. The Minutes Between Two Times mode above does this automatically.
8:01 AM is 481 minutes after midnight and 8:13 AM is 493 minutes after midnight, so the difference is 12 minutes.
Convert each time to minutes after midnight (hours times 60 plus minutes), then subtract the start value from the end value. If the end time is on the next day, add 1,440 minutes first.
Divide the number of minutes by 60. For example, 30 minutes divided by 60 equals 0.50 decimal hours.
15 minutes divided by 60 equals 0.25 decimal hours exactly.
30 minutes divided by 60 equals 0.50 decimal hours exactly.
45 minutes divided by 60 equals 0.75 decimal hours exactly.
37 minutes divided by 60 equals 0.616666... decimal hours exactly, which is approximately 0.6167 rounded to four decimal places or 0.62 rounded to two decimal places.
1 minute divided by 60 equals approximately 0.0167 decimal hours rounded to four decimal places.
0.25 multiplied by 60 equals 15 minutes.
0.50 multiplied by 60 equals 30 minutes.
0.75 multiplied by 60 equals 45 minutes.
0.1 multiplied by 60 equals 6 minutes, which is why one-tenth of an hour on a timesheet equals 6 minutes.
0.2 multiplied by 60 equals 12 minutes.
0.6 multiplied by 60 equals 36 minutes.
Because an hour has 60 minutes rather than 100, and 15 is one-quarter of 60, so 15 minutes equals one-quarter of an hour, or 0.25.
30 is exactly half of the 60 minutes in an hour, so 30 minutes equals 0.50 of an hour.
A clock value of 7:30 means 7 hours and 30 minutes, and 30 minutes converts to 0.50 decimal hours, so 7:30 equals 7.50 decimal hours, not 7.30. The digits after a decimal point represent a fraction of 60 minutes, not clock minutes.
Keep the whole hours as they are, divide the leftover minutes by 60, then add the two values together.
45 minutes divided by 60 equals 0.75, so 7 hours 45 minutes equals 7.75 decimal hours exactly.
37 minutes divided by 60 equals 0.616666..., so 7 hours 37 minutes equals 7.616666... decimal hours exactly, which is approximately 7.6167 to four decimal places or 7.62 to two decimal places.
Payroll rounding is the practice of recording clock-in and clock-out times to a fixed increment, such as the nearest 5 minutes, nearest one-tenth of an hour, or nearest quarter hour, instead of to the exact minute.
Quarter-hour rounding maps a recorded time to the nearest 15-minute increment, using breakpoints such as 1 through 7 minutes rounding down and 8 through 22 minutes rounding to the quarter hour.
The 7-minute rule is an informal, commonly used nickname for nearest-quarter-hour rounding. It is not the name of a federal statute. The underlying regulation, 29 CFR 785.48, addresses permissible time-clock rounding practices without using that phrase.
No. Federal law does not require rounding. It permits certain longstanding rounding practices under 29 CFR 785.48 only when the practice does not, over time, result in employees failing to be properly compensated for all time actually worked.
Federal regulation recognizes nearest-quarter-hour rounding as a longstanding practice under certain conditions, but this is not automatically lawful in every situation, and state or local law can impose stricter requirements than federal law.
One-tenth of an hour equals 60 divided by 10, or 6 minutes.
Because an hour contains 60 minutes, dividing it into 10 equal parts produces 6 minutes per part.
Decimal rounding changes how a value is displayed, such as showing 0.616666... as 0.62, without changing the underlying minutes. Time-clock rounding actually maps the recorded minutes themselves to a different increment, such as mapping 37 minutes to 30 minutes.
Yes. Convert 37 minutes to decimal hours (37 divided by 60, or about 0.616666...) and multiply by the hourly rate. At $20 per hour that is approximately $12.33.
No. This calculator performs minute and decimal-hour math and explains a federal regulation in general terms. It is not legal advice, and it does not determine whether any specific employer's rounding practice complies with federal, state, or local law.
Use the Hours Calculator for a full shift, lunch breaks, weekly totals, overtime, and gross pay. This Minute Calculator is focused on minute-level differences and decimal-hour conversion instead.