---
title: "Kilocalories to British thermal units — kcal to BTU converter"
description: "1 kilocalorie = 3.965667 British thermal units. Conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/kcal-to-btu/
site: "At One Place"
---

# Kilocalories to British thermal units

**1 kilocalorie in British thermal units: 1 kcal = 3.965667 BTU**

BTU = kcal × 3.965666831

To convert kilocalories to British thermal units, multiply by 3.965666831. The table below gives the values people look up most often, and the converter works for any number.

## Kilocalories to British thermal units table

*Common kilocalorie values converted to British thermal units.*

| Kilocalories | British thermal units |
| --- | --- |
| 1 kcal | 3.965667 |
| 2 kcal | 7.931334 |
| 3 kcal | 11.897 |
| 4 kcal | 15.86267 |
| 5 kcal | 19.82833 |
| 10 kcal | 39.65667 |
| 15 kcal | 59.485 |
| 20 kcal | 79.31334 |
| 25 kcal | 99.14167 |
| 30 kcal | 118.97 |
| 40 kcal | 158.6267 |
| 50 kcal | 198.2833 |
| 75 kcal | 297.425 |
| 100 kcal | 396.5667 |
| 250 kcal | 991.4167 |
| 500 kcal | 1,982.8334 |
| 1,000 kcal | 3,965.6668 |

## How the conversion works

The relationship is BTU = kcal × 3.965666831. Both units measure energy, so the conversion is a fixed factor that never changes.

> Kilocalorie: The "calorie" on food labels.

## Common questions

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

One kilocalorie equals 3.965667 British thermal units. BTU = kcal × 3.965666831.

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

Use BTU = kcal × 3.965666831. So 10 kcal is 39.65667 BTU.

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

One British thermal unit equals 0.25216 kilocalories, which is the reverse of the conversion above.

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

The "calorie" on food labels.

## Related pages

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