EnergyCalories to Watt Hours

Calories to Watt-hours

Snapshot

1 Calorie equals 0.001162 Watt-hours. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.

Reference basis: This conversion uses exact joule-based energy definitions.
Example: For 5 Calories, the result equals 0.005811 Watt-hours.
Use the reverse page if you need the opposite direction with the same basis.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Interactive conversion

Converter Calculator

0.001162 Watt-hours (Wh)

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Machine access

Available to apps and AI agents

Calories to Watt-hours can be requested through Conversion Encyclopedia's structured interfaces by software and compatible AI agents. The identifiers below select the same calculation as the calculator.

Machine-readable identifiers

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

The JSON API and OpenAPI specification use the identifiers to reach the conversion engine. WebMCP lets compatible AI agents request the same calculation.

Example API request and response

POST /api/v1/convert

Request

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

Essential response

{
  "ok": true,
  "conversion": {
    "family": "energy",
    "value": 1,
    "from": "calories",
    "to": "watt_hours",
    "result": {
      "raw": 0.0011622222222222223,
      "display": "0.001162"
    },
    "canonicalPath": "/energy/calories-to-watt-hours/"
  }
}

Full API documentation

Explanation

Formula: Watt-hours = Calories × 0.001162. Why: watt-hour units convert to energy through the exact relationship 1 Wh = 3,600 J, so the calculator normalizes through joules before applying the target scale.

Calories (cal): a small thermal energy unit with a fixed joule equivalent, used in chemistry and heat calculations.

Watt-hours (Wh): an electrical energy unit equal to 3,600 joules, common for batteries, devices, and utility sub-metering.

This route is useful when translating electrical energy values between joules, watt-hours, and kilowatt-hours for batteries, storage, and utility consumption comparisons.

This conversion is purely multiplicative because both units reduce through joules using fixed energy definitions with no offset.

Method & Reference

Method basis: exact conversion formula shown in Snapshot.
Applied factor: 1 Calorie = 0.001162 Watt-hours (using exact joule-based energy definitions).
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Calories (cal)	Watt-hours (Wh)
1	0.001162
5	0.005811
10	0.011622
100	0.116222
1,000	1.162222
3,600	4.184
10,000	11.622222
1,000,000	1,162.222222

Questions & answers

Frequently Asked Questions

What is 1 calorie in watt-hours?

1 Calorie equals 0.001162 Watt-hours on this page.

Does this Calories to Watt-hours page use the exact relationship 1 Wh = 3,600 J?

Yes. Watt-hour and kilowatt-hour routes use the exact relationship 1 Wh = 3,600 J through one joule normalization path, so electrical energy values stay aligned across the page.

When would I convert calories to watt-hours?