Energy
Browse Energy conversions1 joule = 0.0002777778 watt-hour
Precision
How This Conversion Works
Joule and watt-hour are both used for energy conversions. This page converts 1 joule into 0.0002777778 watt-hour using the formula shown below.
Use this result for quick checks, comparisons, and everyday reference. For work that depends on exact precision, review the rounding setting and the assumption note before using the number.
The precision controls let you switch between a shorter result, the standard readable result, and scientific notation when the value is very large or very small.
Unit Notes
- joule (J) is the base unit used for energy conversions.
- 1 watt-hour (Wh) equals 3600 joule.
Conversion Questions
How do you convert joule to watt-hour?
This page converts joule to watt-hour using this formula: (1 x 1) / 3600.
What is 1 joule in watt-hour?
1 joule equals 0.0002777778 watt-hour.
How many decimals does this converter show?
Displayed to 10 decimal places, trimmed for readability. The precision buttons can also show a shorter result or scientific notation.
Equivalent Values
1
joule
0.001
kilojoule
0.2390057361
calorie
0.0002390057
kilocalorie
0.0002777778
watt-hour
0.0000002778
kilowatt-hour
0.0009478171
British thermal unit
6241509074460763136
electronvolt
0.0000000095
therm
Nearby Values
0.5 joule
0.0001388889 watt-hour
1 joule
0.0002777778 watt-hour
2 joule
0.0005555556 watt-hour
5 joule
0.0013888889 watt-hour
10 joule
0.0027777778 watt-hour
- Formula
- (1 x 1) / 3600
- Rounding
- Displayed to 10 decimal places, trimmed for readability.
- Assumption
- Energy units use SI definitions. Calorie is the thermochemical calorie at 4.184 joules. BTU is the International Table BTU.