Energy unit converter
Convert the energy value to other units and compare results by unit
Input
The example value has been entered. Check it immediately or change the value.
Input is processed in the browser. Refreshing returns a sample value.
Result
Check or change the value using the example value result.
cal and kcal are calories. 1cal=4.184J. The result is displayed up to 12 digits.
Share result
Share the tool link and result text together. No URL is included in the result. Check the below content and then share it.
Calculation·conversion criteria
Convert energy units from J·kJ·kcal·kWh.
Input example
1 J = 0.001 kJ
1kWh is 3,600,000J of energy used at 1,000W for 3,600 seconds. According to thermochemical calories, 1kcal is 4,184J.
How to use
- Use the provided example value or replace the value and input unit field.
- Click Verify result and check the following result.
- Result can be copied if needed.
Frequently Asked Questions
Can kW and kWh be converted to the same unit?
kW is power per unit; kWh is energy. Energy = power per unit × time, so usage time is required for connection. Use W unit notation for devices.
Calculation criteria and reference materials
- NIST — SI unit conversion table
Conversion standards for international units and non‑SI units
Verification of calculation criteria: · Calculation·verification principles · Report errors