Calculate time duration, add or subtract time, convert between time formats, and more. Your complete toolkit for all time-related calculations.
| Unit | Equivalent |
|---|---|
| 1 minute | 60 seconds |
| 1 hour | 60 minutes / 3,600 seconds |
| 1 day | 24 hours / 1,440 minutes |
| 1 week | 7 days / 168 hours |
| 1 month (avg) | 30.44 days / 730.5 hours |
| 1 year | 365.25 days / 8,766 hours |
| Minutes | Decimal | Minutes | Decimal |
|---|---|---|---|
| 5 min | 0.08 | 35 min | 0.58 |
| 10 min | 0.17 | 40 min | 0.67 |
| 15 min | 0.25 | 45 min | 0.75 |
| 20 min | 0.33 | 50 min | 0.83 |
| 25 min | 0.42 | 55 min | 0.92 |
| 30 min | 0.50 | 60 min | 1.00 |
Convert standard time to decimal hours for easier calculations.
Extract minutes from the decimal portion.
Calculate the difference between two times.
Calculate days between two dates using milliseconds.
Select the specific time calculation you need from the available options.
Input hours, minutes, seconds, or dates as required.
Choose add/subtract, time format, or other options.
View your calculated result with detailed breakdown.
Calculate total hours worked: 9:00 AM to 5:30 PM with 1-hour lunch
Departure: 14:30, Arrival: 22:15 (same day)
Convert 7:45 hours to decimal for payroll
Project starts Jan 15, needs 45 business days
Pace: 5:30 per km, Distance: 42.195 km
Today to December 25, 2024
Divide the minutes by 60 and add to the hours. For example, 2 hours 30 minutes = 2 + (30/60) = 2.5 decimal hours. Use our "Time to Decimal" calculator for instant conversion.
If you work from 10:00 PM to 6:00 AM, that's a total of 8 hours. Our duration calculator handles overnight shifts automatically.
12-hour time uses AM/PM (1:00 PM = afternoon), while 24-hour time runs 0-23 (13:00 = 1 PM). Add 12 to PM hours (except 12 PM) to convert to 24-hour format.
There are 52 weeks and 1 day in a regular year (52.143 weeks), and 52 weeks and 2 days in a leap year (52.286 weeks).
Time zones are expressed as UTC offsets. EST is UTC-5, PST is UTC-8, GMT is UTC+0. Add or subtract the difference between zones to convert times.