Joules to Kilojoules
Convert joules (J) to kilojoules (kJ). Live results, batch values, CSV export, formula and examples. Free, no sign-up.
Runs on your device · no data upload
Up to 500 values. Calculations stay on this device. Decimal point: dot. Results use floating-point arithmetic and the selected display precision.
Results
1 values converted
| row | input | from | result | to | error |
|---|---|---|---|---|---|
| 1 | 1 | J | 0.001 | kJ | — |
Calories are thermochemical (4.184 joules), BTU uses the International Table definition, and electronvolts use the exact elementary charge.
Raw response
[
{
"row": 1,
"input": 1,
"from": "J",
"result": "0.001",
"to": "kJ"
}
]How to convert joules to kilojoules
Enter one value or paste one value per line. Change precision, swap units, then copy or export the results. Invalid values are reported individually.
result = (value × 1 + 0 − 0) ÷ 1000
Calories are thermochemical (4.184 joules), BTU uses the International Table definition, and electronvolts use the exact elementary charge.
| Joules (J) | Kilojoules (kJ) |
|---|---|
| 0 | 0 |
| 1 | 0.001 |
| 10 | 0.01 |
| 100 | 0.1 |
Reference: NIST unit conversion factors. Decimal and binary storage prefixes are distinct; rounded display values do not change the underlying calculation.