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Convert between hours, minutes, seconds, and days instantly
Hours to Minutes: min = hr × 60
Minutes to Seconds: sec = min × 60
Hours to Seconds: sec = hr × 3,600
Days to Hours: hr = days × 24
Minutes to Hours: hr = min ÷ 60
Seconds to Minutes: min = sec ÷ 60
| Duration | Hours | Minutes | Seconds | Days |
|---|---|---|---|---|
| Blink of an Eye | 0.0001 hr | 0.01 min | 0.3 sec | 0.0000 d |
| One Minute | 0.0167 hr | 1.00 min | 60 sec | 0.0007 d |
| Coffee Break | 0.2500 hr | 15.00 min | 900 sec | 0.0104 d |
| Half Hour | 0.5000 hr | 30.00 min | 1,800 sec | 0.0208 d |
| One Hour | 1.0000 hr | 60.00 min | 3,600 sec | 0.0417 d |
| Work Half-Day | 4.0000 hr | 240.00 min | 14,400 sec | 0.1670 d |
| Standard Workday | 8.0000 hr | 480.00 min | 28,800 sec | 0.3330 d |
| Half Day | 12.0000 hr | 720.00 min | 43,200 sec | 0.5000 d |
| One Day | 24.0000 hr | 1440.00 min | 86,400 sec | 1.0000 d |
| One Week | 168.0000 hr | 10080.00 min | 604,800 sec | 7.0000 d |
Seconds: The base unit of time in the International System of Units (SI). Originally defined based on Earth's rotation, it's now defined by atomic clock measurements. One second is 1/60th of a minute.
Minutes: A unit of time equal to 60 seconds. The minute was historically derived from dividing an hour into 60 parts, a system that dates back to ancient Babylonian mathematics.
Hours: A unit of time equal to 60 minutes or 3,600 seconds. The 24-hour day comes from ancient Egyptian timekeeping, where they divided daylight and nighttime into 12 hours each.
Days: A unit of time representing one complete rotation of Earth on its axis, equal to 24 hours. A day is divided into 86,400 seconds and is the basis for our calendar system.
There are 3,600 seconds in one hour. This is calculated by multiplying 60 minutes by 60 seconds per minute (60 × 60 = 3,600). This conversion is commonly used in physics calculations and time tracking.
The base-60 (sexagesimal) system for time comes from ancient Babylonian mathematics. They chose 60 because it's divisible by many numbers (1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60), making it convenient for calculations and subdivisions.
To convert decimal hours (like 2.5 hours), take the whole number as hours (2) and multiply the decimal part by 60 to get minutes (0.5 × 60 = 30). So 2.5 hours = 2 hours and 30 minutes.
Understanding time conversions is essential for productivity tracking. For example, knowing that an 8-hour workday equals 480 minutes helps break down tasks. The Pomodoro Technique uses 25-minute (1,500-second) intervals for focused work.