h Accepted alongside SI
Measures: Time — how long something takes
Hour
The unit workdays, wages, and schedules are built from.
TimeHow it's defined
Defined as exactly 3,600 seconds (60 minutes). Like the minute, a Babylonian survivor accepted for use alongside the SI.
1 h = 60 min = 3,600 s — exact
Convert — honestly
h equals
3600 s
Second · factor exact — the base unit itself
60 min
Minute · factor exact — exact by definition
0.0416666667 d
Day · factor exact — exact by definition
Conversions run through the second using the stated factors — no rounding beyond display precision, and every factor says whether it's exact or measured.
Where you meet it
- Timii — the unit its time entries are billed in ↗ open timii
- The kilowatt-hour on every electricity bill is this unit multiplied by power
Other ways to measure time
Source
This page is an authored summary of the authoritative definition — checkable one click away.
BIPM — The International System of Units (SI Brochure, 9th ed.)