---
title: "Calories to Watt-hours — cal to Wh converter"
description: "1 calorie = 0.0011622 watt-hours. Convert calories to watt-hours with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/calories-to-watt-hours/
site: "At One Place"
---

# Calories to watt-hours

**1 calorie in watt-hours: 1 cal = 0.0011622 Wh**

Wh = cal × 0.001162222222

To convert calories to watt-hours, multiply by 0.001162222222. The table below gives the values people look up most often, and the converter works for any number.

## Calories to watt-hours table

*Common calorie values converted to watt-hours.*

| Calories | Watt-hours |
| --- | --- |
| 1 cal | 0.0011622 |
| 2 cal | 0.0023244 |
| 3 cal | 0.0034867 |
| 4 cal | 0.0046489 |
| 5 cal | 0.0058111 |
| 10 cal | 0.011622 |
| 15 cal | 0.017433 |
| 20 cal | 0.023244 |
| 25 cal | 0.029056 |
| 30 cal | 0.034867 |
| 40 cal | 0.046489 |
| 50 cal | 0.058111 |
| 75 cal | 0.087167 |
| 100 cal | 0.11622 |
| 250 cal | 0.29056 |
| 500 cal | 0.58111 |
| 1,000 cal | 1.162222 |

## How the conversion works

The relationship is Wh = cal × 0.001162222222. Both units measure energy, so the conversion is a fixed factor that never changes.

> Calorie: Thermochemical (small) calorie.

## Common questions

### How many watt-hours are in one calorie?

One calorie equals 0.0011622 watt-hours. Wh = cal × 0.001162222222.

### How do you convert calories to watt-hours?

Use Wh = cal × 0.001162222222. So 10 cal is 0.011622 Wh.

### How many calories are in one watt-hour?

One watt-hour equals 860.4207 calories, which is the reverse of the conversion above.

### Is there more than one kind of calorie?

Thermochemical (small) calorie.

## Related pages

- [Watt-hours to Calories](https://atoneplace.net/convert/watt-hours-to-calories/)
- [Calories to Joules](https://atoneplace.net/convert/calories-to-joules/)
- [Calories to Kilojoules](https://atoneplace.net/convert/calories-to-kilojoules/)
- [Calories to Kilocalories](https://atoneplace.net/convert/calories-to-kcal/)
- [Calories to Kilowatt-hours](https://atoneplace.net/convert/calories-to-kwh/)
- [Calories to British thermal units](https://atoneplace.net/convert/calories-to-btu/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)