---
title: "Joules to Calories — J to cal converter"
description: "1 joule = 0.23901 calories. Convert joules to calories with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/joules-to-calories/
site: "At One Place"
---

# Joules to calories

**1 joule in calories: 1 J = 0.23901 cal**

cal = J × 0.2390057361

To convert joules to calories, multiply by 0.2390057361. The table below gives the values people look up most often, and the converter works for any number.

## Joules to calories table

*Common joule values converted to calories.*

| Joules | Calories |
| --- | --- |
| 1 J | 0.23901 |
| 2 J | 0.47801 |
| 3 J | 0.71702 |
| 4 J | 0.95602 |
| 5 J | 1.195029 |
| 10 J | 2.390057 |
| 15 J | 3.585086 |
| 20 J | 4.780115 |
| 25 J | 5.975143 |
| 30 J | 7.170172 |
| 40 J | 9.560229 |
| 50 J | 11.95029 |
| 75 J | 17.92543 |
| 100 J | 23.90057 |
| 250 J | 59.75143 |
| 500 J | 119.5029 |
| 1,000 J | 239.0057 |

## How the conversion works

The relationship is cal = J × 0.2390057361. Both units measure energy, so the conversion is a fixed factor that never changes.

> Calorie: Thermochemical (small) calorie.

## Common questions

### How many calories are in one joule?

One joule equals 0.23901 calories. cal = J × 0.2390057361.

### How do you convert joules to calories?

Use cal = J × 0.2390057361. So 10 J is 2.390057 cal.

### How many joules are in one calorie?

One calorie equals 4.184 joules, which is the reverse of the conversion above.

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

Thermochemical (small) calorie.

## Related pages

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