Convert kilojoules (kJ) to kilocalories (kcal, "大卡") for food nutrition, diet planning, and fitness tracking. 1 kilocalorie = 4.184 kilojoules (exact conversion factor).
Core Conversion:
1 Kilocalorie (kcal) = 4.184 Kilojoules (kJ) | 1 Kilojoule (kJ) ≈ 0.239 kcal
kcal = kJ ÷ 4.184 | kJ = kcal × 4.184 (e.g., 100 kJ ≈ 23.9 kcal; 500 kcal ≈ 2092 kJ)
Accepts decimals (e.g., 1000 kJ ≈ 239.01 kcal)
Display format:
Quick conversions (common food energy) - click to auto-fill:
Useful for diet/fitness? Share with friends:
Key differences between kilojoules (kJ) and kilocalories (kcal) — and when to use each
| Unit | Definition | Common Uses | Global Adoption |
|---|---|---|---|
| Kilojoule (kJ) | 1 kJ = energy to move 1 kg 1 meter with 1 newton force (SI unit) | Food nutrition labels (most countries), science, engineering | Global standard (EU, Asia, Australia, Canada) |
| Kilocalorie (kcal) | 1 kcal = energy to heat 1 kg water by 1°C (food "calorie") | Food labels (US), diet planning, fitness tracking ("大卡") | Primary in US; secondary in most other countries |
| Food Item (1 serving) | Kilojoules (kJ) | Kilocalories (kcal) | Notes |
|---|---|---|---|
| Apple (medium, ~150g) | 418 kJ | 100 kcal | Fresh, unpeeled |
| White rice (cooked, ~150g) | 1000 kJ | 239 kcal | Long-grain |
| Hard-boiled egg (1 piece) | 167 kJ | 40 kcal | Medium-sized (~50g) |
| Cheeseburger (fast-food) | 2092 kJ | 500 kcal | With beef patty & cheese |
| Coca-Cola (330ml can) | 564 kJ | 135 kcal | Regular (not diet) |
Common energy conversions for food, diet, and fitness
| Kilojoules (kJ) | ≈ | Kilocalories (kcal) | Use Case |
|---|---|---|---|
| 100 kJ | ≈ | 23.90 kcal | 1 small banana |
| 500 kJ | ≈ | 119.50 kcal | 1 slice of bread + 1 tbsp peanut butter |
| 1000 kJ | ≈ | 239.01 kcal | 1 bowl of oatmeal + milk |
| 2000 kJ | ≈ | 478.02 kcal | 1 serving of grilled chicken salad |
| 4184 kJ | = | 1000.00 kcal | 1 large meal (e.g., steak + potatoes) |
Conversion factor: 1 kcal = 4.184 kJ (exact). All values rounded to 2 decimal places for practical use.
Common questions about kJ to kcal conversions
Dual labeling accommodates global standards and consumer habits:
Use the exact conversion factor 1 kcal = 4.184 kJ:
kcal = kJ ÷ 4.184
kJ = kcal × 4.184
Example 1: Convert 500 kJ to kcal
500 kJ ÷ 4.184 ≈ 119.50 kcal
Example 2: Convert 300 kcal to kJ
300 kcal × 4.184 = 1255.2 kJ
Yes! The "calorie" you see on food labels is actually a kilocalorie (kcal):
For most people, rounding to 1-2 decimal places is enough:
The 4.184 factor comes from the definition of a kilocalorie:
This is an exact scientific standard, so the conversion factor never changes.
Energy Converter
kcal to cal, cal to kcal, energy converter, calorie conversion, kcal en cal, kcal en calorie, kcal to calories
Accurately convert kilocalories (kcal) to calories (cal) and vice versa with 4 decimal places precision by default.
nm to ft-lbs, ft-lbs to nm, torque converter, torque conversion, nm to ft-lbs converter, newton meters to foot pounds, nm to lb ft
Accurately convert Newton-meters (Nm) to foot-pounds (ft-lbs) and vice versa with 4 decimal places precision by default.
foot-pound to newton-meter, ft·lb to N·m, torque converter, newton-meter to foot-pound, N·m to ft·lb, torque conversion, unit converter, engineering units, ft lbs to nm, ft lbs in nm, ft lbs nm calcul
Accurate foot-pound to newton-meter converter for torque units. Convert ft·lb to N·m and vice versa with precise results. Includes conversion tables, formulas, and detailed explanations for engineers and mechanics.
kJ to joules, kilojoules to joules, energy conversion, kJ converter, joule calculator, kj to j, change kj to j, kilo joule to joule, kj in j
Convert kilojoules to joules instantly with our accurate online converter. Supports bidirectional conversion with formula, examples, and reference table.
kJ to kcal, kilojoules to kilocalories, kilojoule naar kcal, food calorie converter, kjul kcal, kjoule in kcal, kj to kilocalories
Convert kilojoules (kJ) to kilocalories (kcal) for food, diet, and fitness tracking—1 kcal = 4.184 kJ.
kcal to kJ, kilocalories to kilojoules, food energy converter, diet tracking units, kcal to kjoules, kcal in kjoule, kcal kjoule conversion
Convert kcal to kJ (kilocalories to kilojoules) for food nutrition, diet, and fitness—1 kcal = 4.184 kJ.
Don't see the tool you need? Let us know via email, and we'll consider adding it.
869241891@qq.com