Minute Calculator
Enter any number of minutes to convert instantly to hours, seconds, and days, or switch to Duration Math mode to add or subtract two time values and get the total in every unit. The results panel shows the full breakdown and the equivalent fraction of an hour, so you can plan meetings, track work sessions, or check elapsed time in seconds.
Formula
Worked example
90 minutes: 90 x 60 = 5,400 seconds; 90 / 60 = 1.5 decimal hours; 90 / 1440 = 0.0625 days; formatted as 1h 30m 00s.
How to convert minutes to hours, seconds, and days
Converting minutes to other time units uses three simple multiplication or division steps. To get seconds, multiply the number of minutes by 60 (because each minute contains 60 seconds). To get decimal hours, divide by 60 (60 minutes make one hour). To get decimal days, divide by 1,440 (the number of minutes in a 24-hour day). For example, 90 minutes becomes 5,400 seconds, 1.5 decimal hours, and 0.0625 days. The formatted version, hours colon minutes colon seconds, is 1h 30m 00s.
Adding and subtracting durations in minutes
When you need to combine or compare two time blocks, the cleanest approach is to convert everything to seconds first, perform the arithmetic, then convert the result back. For example, adding 1 h 30 min and 0 h 45 min: convert to 5,400 s and 2,700 s, sum to 8,100 s, divide by 60 to get 135 minutes or 2 h 15 min. Subtraction works the same way. If the result is negative, it means Duration B is longer than Duration A. This approach avoids the carry and borrow logic you would otherwise need when working directly in hours, minutes, and seconds.
Decimal hours and payroll time-tracking
Most payroll and billing systems store time as a decimal fraction of an hour rather than as hours-and-minutes pairs. A 15-minute task is 0.25 h, a 45-minute call is 0.75 h, and a 90-minute meeting is 1.5 h. The fraction-of-an-hour output from this calculator gives you exactly that number. If your time-tracking software expects decimal hours, multiply the decimal hours value by your hourly rate to get the billable amount directly.
The base-60 (sexagesimal) system and why it still matters
Minutes and seconds use base 60, a system inherited from ancient Babylon. The Babylonians chose 60 because it divides evenly by 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, and 30, making it easy to express common fractions without remainders. That mathematical convenience is why the system survived into the modern SI second, GPS timekeeping, and navigation. When you convert minutes to decimal hours, you are crossing from base-60 to base-10, which is why the conversion factor is 60.
Quick minute conversion reference
| Minutes | Seconds | Decimal hours | Decimal days |
|---|---|---|---|
| 1 | 60 | 0.0167 | 0.000694 |
| 5 | 300 | 0.0833 | 0.003472 |
| 10 | 600 | 0.1667 | 0.006944 |
| 15 | 900 | 0.25 | 0.010417 |
| 30 | 1800 | 0.5 | 0.020833 |
| 45 | 2700 | 0.75 | 0.031250 |
| 60 | 3600 | 1.0 | 0.041667 |
| 90 | 5400 | 1.5 | 0.062500 |
| 120 | 7200 | 2.0 | 0.083333 |
| 180 | 10800 | 3.0 | 0.125000 |
| 240 | 14400 | 4.0 | 0.166667 |
| 480 | 28800 | 8.0 | 0.333333 |
| 1440 | 86400 | 24.0 | 1.000000 |
Common minute values and their equivalents in seconds, hours, and days.
Frequently asked questions
How many seconds are in a minute?
There are exactly 60 seconds in one minute. To convert any number of minutes to seconds, multiply by 60. For example, 45 minutes is 45 x 60 = 2,700 seconds.
How do I convert minutes to decimal hours?
Divide the number of minutes by 60. For instance, 90 minutes / 60 = 1.5 hours. This decimal format is commonly required by payroll and billing software.
How many minutes are in a day?
1,440 minutes are in one 24-hour day (24 hours x 60 minutes per hour = 1,440). To convert minutes to decimal days, divide by 1,440.
How do I add two time durations with minutes?
Convert both durations to seconds (hours x 3600 plus minutes x 60 plus seconds), add the totals, then convert back. This avoids carry errors. For example, 1h 40m plus 0h 50m: 6,000 s plus 3,000 s = 9,000 s = 150 minutes = 2h 30m.
What is a fraction of an hour?
The fraction of an hour is minutes / 60. It represents how much of a full 60-minute hour the duration equals. Fifteen minutes = 0.25 of an hour; 30 minutes = 0.50; 45 minutes = 0.75. Time-tracking and payroll systems often bill in these decimal fractions rather than in hours-and-minutes format.
Can I calculate a negative time duration?
Yes. Use Subtract mode and enter Duration A as the earlier or shorter time and Duration B as the later or longer one. If Duration B is larger, the result will be negative, meaning Duration A is shorter by that many minutes. This is useful for finding scheduling gaps or checking whether a buffer period is sufficient.