Kilocalories to British Thermal Units Converter
Convert kilocalories to British thermal units instantly with this free kilocalories to British thermal units converter. Enter any value to get an accurate energy conversion, plus the formula, the conversion factor and a full reference table.
What is 1 kilocalorie in British thermal units?
1 kilocalorie is equal to 3.96566683 British thermal units.
1 × 3.96566683 = 3.96566683 British thermal units
1 kilocalorie = 3.965666831 British thermal units
Kilocalories to British thermal units formula
BTU = kcal × 3.96566683
The kilocalories to British thermal units conversion factor is 3.96566683139 (rounded). 1 kilocalorie = 3.96566683139 British thermal units, and 1 British thermal unit = 0.252164400722 kilocalories.
Worked examples
- 2 kilocalories = 7.93133366 British thermal units — 2 × 3.96566683 = 7.93133366 British thermal units
- 6 kilocalories = 23.794001 British thermal units — 6 × 3.96566683 = 23.794001 British thermal units
- 10 kilocalories = 39.6566683 British thermal units — 10 × 3.96566683 = 39.6566683 British thermal units
Kilocalories to British thermal units conversion table
Every value below is calculated with the exact conversion factor and rounded for display.
| Kilocalories (kcal) | British thermal units (BTU) |
|---|---|
| 1 kcal | 3.9656668 BTU |
| 2 kcal | 7.9313337 BTU |
| 3 kcal | 11.897 BTU |
| 4 kcal | 15.862667 BTU |
| 5 kcal | 19.828334 BTU |
| 6 kcal | 23.794001 BTU |
| 7 kcal | 27.759668 BTU |
| 8 kcal | 31.725335 BTU |
| 9 kcal | 35.691001 BTU |
| 10 kcal | 39.656668 BTU |
| 12 kcal | 47.588002 BTU |
| 15 kcal | 59.485002 BTU |
| 20 kcal | 79.313337 BTU |
| 25 kcal | 99.141671 BTU |
| 30 kcal | 118.97 BTU |
| 50 kcal | 198.28334 BTU |
| 75 kcal | 297.42501 BTU |
| 100 kcal | 396.56668 BTU |
| 500 kcal | 1,982.8334 BTU |
| 1,000 kcal | 3,965.6668 BTU |
When you need to convert kilocalories to British thermal units
- Comparing food energy labelled in calories with labels in kilojoules.
- Reading utility bills and appliance ratings that mix kWh, joules and BTU.
Common mistakes to avoid
- Dividing when you should multiply. Because 1 kilocalorie = 3.96567 British thermal units, the answer should be larger than the number you started with.
- Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.
How precise does the answer need to be?
Round only at the end, and only to the precision your task actually needs. The converter above keeps full double precision internally and rounds for display.
How these units are defined
- Kilocalorie (kcal): 1,000 small calories — the 'Calorie' on US nutrition labels. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
- British thermal unit (BTU): The heat needed to raise one pound of water by 1 °F; used for HVAC in the US. The accepted value is a measured or conventional figure rather than an exact definition, so the factor shown is rounded.
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Frequently asked questions
- What is 1 kilocalorie in British thermal units?
- 1 kilocalorie is equal to 3.96566683 British thermal units.
- How many kilocalories are in one British thermal unit?
- There are 0.252164401 kilocalories in 1 British thermal unit.
- How do you convert kilocalories to British thermal units?
- Multiply the number of kilocalories by 3.96566683 — or use the formula BTU = kcal × 3.96566683.
- What is 6 kilocalories in British thermal units?
- 6 kilocalories is 23.794001 British thermal units. 6 × 3.96566683 = 23.794001 British thermal units.
- Is the kilocalories to British thermal units conversion exact?
- The factor 3.96566683139 is a rounded value because at least one of these units is defined by measurement rather than by an exact definition.