EnergyKilojoules to Calories

Kilojoules to Calories

Methodology·How We Verify

Snapshot

1 Kilojoule equals 239.005736 Calories.

Reference basis: This conversion uses exact joule-based energy definitions.
Example: For 5 Kilojoules, the result equals 1,195.028681 Calories.

Interactive conversion

Converter Calculator

Decimals: 1.5 or 1,5. Fractions: 1/2. Scientific notation: 1e3. Write 1000 without grouping separators.

239.005736 Calories (cal)

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API and AI agent access

Kilojoules to Calories.

Machine-readable identifiers

Conversion family: energy
Source unit: kilojoules
Target unit: calories

Use these identifiers in the API request. Sources and model limits also apply to software clients.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "energy",
  "value": 1,
  "from": "kilojoules",
  "to": "calories"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "energy",
    "value": 1,
    "from": "kilojoules",
    "to": "calories",
    "result": {
      "raw": 239.0057361376673,
      "display": "239.005736"
    },
    "canonicalPath": "/energy/kilojoules-to-calories/"
  }
}

API, OpenAPI and WebMCP documentation

Explanation

Multiply by 239.0057361376673 (derived from joules) because 1 kJ = 1000 J and 1 cal = 4.184 J.

Method & Reference

Method basis: exact conversion formula shown in Snapshot.
Applied factor: 1 Kilojoule = 239.005736 Calories (using exact joule-based energy definitions).
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Kilojoules (kJ)	Calories (cal)
1	239.005736
5	1,195.028681
10	2,390.057361
100	23,900.573614
1000	239,005.736138
3600	860,420.650096
10000	2,390,057.361377
1000000	239,005,736.137667

Questions & answers

Frequently Asked Questions

What is 1 kilojoule in calories?

1 Kilojoule equals 239.005736 Calories on this page.

When would I convert kilojoules to calories?

This route is useful when translating thermal and nutritional energy values across calories, kilocalories, BTU, and joule-based references without mixing the underlying definitions.

How do I reverse Kilojoules to Calories?

Use the mirror Calories to Kilojoules route; it applies the inverse relationship with the same energy assumptions.