Energy Converter
Convert between joules, calories, kilowatt-hours, BTU, and more.
Result
4.184
Kilojoules (kJ)
Common conversions
| Conversion | Result |
|---|---|
| 1 kcal → kJ | 4.184 |
| 1 kWh → kJ | 3600 |
| 1 BTU → cal | 252.16539197 |
| 1 kJ → BTU | 0.94781339 |
| 1 Wh → J | 3600 |
| 1 kcal → Wh | 1.16222222 |
Energy units explained
Energy is measured in many units depending on the discipline. Scientists use joules (SI base unit) and kilojoules. Nutritionists use kilocalories (kcal), often labelled "Calories" on food packaging. Electricians use watt-hours and kilowatt-hours (kWh) for consumption billing. Engineers in the US use BTU (British Thermal Units) for HVAC and heating calculations, while mechanical engineers use foot-pounds. This converter routes every value through joules, so all units stay consistent. All conversions run entirely in your browser — no data leaves your device.
Private & free — this tool runs entirely in your browser.
Recommended: IndieKit — Ship your Next.js startup in days.affiliate
Related Converters tools
JSON to YAML
Convert JSON into clean, readable YAML instantly.
YAML to JSON
Convert YAML configuration into valid JSON.
JSON to CSV
Flatten a JSON array of objects into CSV rows.
CSV to JSON
Parse CSV with headers into a JSON array of objects.
JSON to XML
Convert JSON structures into nested XML markup.
JSON Minifier
Strip whitespace to produce compact JSON.
JSON to TypeScript
Generate TypeScript interfaces from a JSON sample.
JSON to SQL
Turn a JSON array of objects into SQL INSERT statements.