Energy converter
Compare joules, watt-hours, calories and other supported energy units.
Your inputs
The editable example is illustrative. Enter your own dimensions, operating data, prices, and fees. Results update as you edit.
Calculations run in your browser. Inputs are not saved or sent to analytics.
Your result
Complete the inputs to see your result.
How it works
- Converted value = Value × f₁ ÷ f₂; SI: J
- Worked example: 1 kWh = 3600000 J; 1 Thermochemical kilocalorie = 4184 J
- Supported input limits: Value: 0 ≤ x ≤ 1000000000000
Assumptions and limitations
Conversion uses the named unit definition and the same physical dimension. The international foot, avoirdupois mass, US liquid/imperial volumes, thermochemical calories and international-table BTU are distinct conventions. Mechanical horsepower is 745.6998715822702 W; metric horsepower is 735.49875 W. Pressure conversion preserves its gauge/absolute reference. Temperature differences use scale factors without offsets.
Sources
- NIST — conversion factor conventions Sources reviewed: 2026-10-06
- NIST — conversion factor table B.8 Sources reviewed: 2026-10-06
