Hour to Second (h to s)
Result
3,600 Second
Formula
s = h × 3,600
1 h = 3,600 s, and 1 s = 0.000277777778 h.
The second is the SI base unit, defined by a caesium-133 transition frequency. Minutes, hours, days and weeks are exact multiples. Month and year here are Gregorian averages: a year of 365.2425 days and a month of one twelfth of that (30.436875 days).
Worked examples
- 1 h × 3,600 = 3,600 s
- 10 h × 3,600 = 36,000 s
- 100 h × 3,600 = 360,000 s
Common mistakes
- Calendar months run from 28 to 31 days, so "3 months" from a given date is not 3 × 30.44 days. Use a date calculator for deadlines.
- A 365-day year, a 365.25-day Julian year and the 365.2425-day Gregorian year differ; interest and astronomy calculations specify which one they use.
Hour to Second table
| Hour (h) | Second (s) |
|---|---|
| 1 | 3,600 |
| 2 | 7,200 |
| 5 | 18,000 |
| 10 | 36,000 |
| 20 | 72,000 |
| 50 | 180,000 |
| 100 | 360,000 |
| 1,000 | 3,600,000 |
The units
- Hour (h)
- 1 Hour = 3,600 Second.
- Second (s)
- A unit of time.
Sources for these factors
- The International System of Units (SI Brochure), 9th edition — BIPM
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy