How Many Seconds in an Hour
A seconds-in-an-hour page provides conversions for time measurements. Based on the standard sexagesimal (base-60) system of measuring time, an hour consists of exactly 60 minutes and each minute contains exactly 60 seconds, which calculates to exactly 3,600 seconds in one hour.
Convert hours to seconds and check the standard time conversion rates. Review formulas and common conversion tables.
Quick Answer
Calculate the exact number of seconds in any number of hours instantly.
How Many Seconds in an Hour?
There are exactly 3,600 seconds in an hour.
This unit relation is consistent under standard Coordinated Universal Time (UTC).
Formula: 1 Hour = 60 Minutes × 60 Seconds = 3,600 Seconds
Hours to Seconds Conversion Chart
| Hours (hr) | Minutes (min) | Seconds (sec) |
|---|---|---|
| 1/4 hr (15 min) | 15 min | 900 sec |
| 1/2 hr (30 min) | 30 min | 1,800 sec |
| 1 hr | 60 min | 3,600 sec |
| 2 hr | 120 min | 7,200 sec |
| 8 hr (Shift) | 480 min | 28,800 sec |
| 24 hr (Day) | 1,440 min | 86,400 sec |
Examples
1 Hour
3,600 seconds
0.5 Hours (Half Hour)
1,800 seconds
2 Hours
7,200 seconds
How it works
Time values are structured using a base-60 (sexagesimal) numerical system. To find the number of seconds in one hour, we multiply the minutes in an hour by the seconds in a minute:
1 Hour (hr) = 3,600 Seconds (sec)
Calculation: 60 minutes × 60 seconds = 3,600 seconds
Converting Hours to Seconds
To convert hours to seconds, multiply the number of hours by 3,600:
Example: 3 hours = 3 × 3,600 = 10,800 seconds
To convert seconds back to hours, divide the total seconds by 3,600:
Example: 5,400 seconds = 5,400 ÷ 3,600 = 1.5 hours
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