---
title: "British thermal units to Kilocalories — BTU to kcal converter"
description: "1 British thermal unit = 0.25216 kilocalories. Conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/btu-to-kcal/
site: "At One Place"
---

# British thermal units to kilocalories

**1 British thermal unit in kilocalories: 1 BTU = 0.25216 kcal**

kcal = BTU × 0.2521644007

To convert British thermal units to kilocalories, multiply by 0.2521644007. The table below gives the values people look up most often, and the converter works for any number.

## British thermal units to kilocalories table

*Common British thermal unit values converted to kilocalories.*

| British thermal units | Kilocalories |
| --- | --- |
| 1 BTU | 0.25216 |
| 2 BTU | 0.50433 |
| 3 BTU | 0.75649 |
| 4 BTU | 1.008658 |
| 5 BTU | 1.260822 |
| 10 BTU | 2.521644 |
| 15 BTU | 3.782466 |
| 20 BTU | 5.043288 |
| 25 BTU | 6.30411 |
| 30 BTU | 7.564932 |
| 40 BTU | 10.08658 |
| 50 BTU | 12.60822 |
| 75 BTU | 18.91233 |
| 100 BTU | 25.21644 |
| 250 BTU | 63.0411 |
| 500 BTU | 126.0822 |
| 1,000 BTU | 252.1644 |

## How the conversion works

The relationship is kcal = BTU × 0.2521644007. Both units measure energy, so the conversion is a fixed factor that never changes.

> Kilocalorie: The "calorie" on food labels.

## Common questions

### How many kilocalories are in one British thermal unit?

One British thermal unit equals 0.25216 kilocalories. kcal = BTU × 0.2521644007.

### How do you convert British thermal units to kilocalories?

Use kcal = BTU × 0.2521644007. So 10 BTU is 2.521644 kcal.

### How many British thermal units are in one kilocalorie?

One kilocalorie equals 3.965667 British thermal units, which is the reverse of the conversion above.

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

The "calorie" on food labels.

## Related pages

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

## 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/)