Hours to Seconds Converter
Convert hours to seconds instantly with this free hours to seconds converter. Enter any value to get an accurate time conversion, plus the formula, the conversion factor and a full reference table.
What is 1 hour in seconds?
1 hour is equal to exactly 3,600 seconds.
1 × 3,600 = 3,600 seconds
Result
1 hour = 3,600 seconds
Hours to Seconds formula
s = h × 3,600
The hours to seconds conversion factor is 3,600, which is exact by definition. 1 hour = 3,600 seconds, and 1 second = 0.000277777778 hours.
Worked examples
- 2 hours = 7,200 seconds — 2 × 3,600 = 7,200 seconds
- 30 hours = 108,000 seconds — 30 × 3,600 = 108,000 seconds
- 100 hours = 360,000 seconds — 100 × 3,600 = 360,000 seconds
Hours to Seconds conversion table
Every value below is calculated with the exact conversion factor and rounded for display.
| Hours (h) | Seconds (s) |
|---|---|
| 1 h | 3,600 s |
| 2 h | 7,200 s |
| 5 h | 18,000 s |
| 10 h | 36,000 s |
| 15 h | 54,000 s |
| 30 h | 108,000 s |
| 45 h | 162,000 s |
| 60 h | 216,000 s |
| 90 h | 324,000 s |
| 100 h | 360,000 s |
| 365 h | 1,314,000 s |
| 1,000 h | 3,600,000 s |
When you need to convert hours to seconds
- Converting durations in project plans, billing sheets and race results.
- Setting timeouts, cache lifetimes and cron intervals in software.
Common mistakes to avoid
- Dividing when you should multiply. Because 1 hour = 3,600 seconds, the answer should be larger than the number you started with.
- Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.
How precise does the answer need to be?
Round only at the end, and only to the precision your task actually needs. The converter above keeps full double precision internally and rounds for display.
How these units are defined
- Hour (h): Sixty minutes. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
- Second (s): The SI base unit of time. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
Related conversions
Frequently asked questions
- What is 1 hour in seconds?
- 1 hour is equal to 3,600 seconds.
- How many hours are in one second?
- There are 0.000277778 hours in 1 second.
- How do you convert hours to seconds?
- Multiply the number of hours by 3,600 — or use the formula s = h × 3,600.
- What is 30 hours in seconds?
- 30 hours is 108,000 seconds. 30 × 3,600 = 108,000 seconds.
- Is the hours to seconds conversion exact?
- Yes. The relationship is fixed by definition, so 3,600 is an exact conversion factor — only the displayed result is rounded.