Convert kilocalories to british thermal units
1 kcal = 3.96566683139 BTU — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
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Show this value in all 39 energy & work units
- Petajoules PJ 4.184e-12
- Terajoules TJ 4.184e-9
- Gigajoules GJ 0.000 004 184
- Megajoules MJ 0.004 184
- Kilojoules kJ 4.184
- Joules J 4184
- Millijoules mJ 4 184 000
- Microjoules µJ 4 184 000 000
- Nanojoules nJ 4 184 000 000 000
- Watt-hours Wh 1.162 222 222 22
- Kilowatt-hours kWh 0.001 162 222 222 22
- Megawatt-hours MWh 0.000 001 162 222 222 22
- Gigawatt-hours GWh 1.16222222222e-9
- Terawatt-hours TWh 1.16222222222e-12
- Calorie (thermochemical)s cal 1000
- Kilocalories kcal 1
- Calorie (IT)s cal (IT) 999.331 231 489
- Kilocalorie (IT)s kcal (IT) 0.999 331 231 489
- British thermal units BTU 3.965 666 831 39
- BTU (thermochemical)s BTU (th) 3.968 321 714 8
- Million BTUs MMBTU 0.000 003 965 666 831 39
- Therm (US)s thm 0.000 039 666 137 026 4
- Therm (EC)s thm (EC) 0.000 039 656 662 774 3
- Electronvolts eV 2.61144739675e+22
- Kiloelectronvolts keV 2.61144739675e+19
- Megaelectronvolts MeV 2.61144739675e+16
- Gigaelectronvolts GeV 26 114 473 967 500
- Teraelectronvolts TeV 26 114 473 967.5
- Ergs erg 41 840 000 000
- Foot-pounds ft·lbf 3085.960 032 58
- Inch-pounds in·lbf 37 031.520 390 9
- Foot-poundals ft·pdl 99 287.827 931 3
- Horsepower-hours hp·h 0.001 558 565 673 02
- Tonne of TNTs t TNT 0.000 001
- Kiloton of TNTs kt TNT 1e-9
- Megaton of TNTs Mt TNT 1e-12
- Hartrees Eₕ 9.59689217281e+20
- Rydbergs Ry 1.91937843456e+21
- Quads quad 3.96566683139e-15
Every row is Kilocalorie (kcal) converted through the joule, in exact rational arithmetic.
How to convert kilocalories to british thermal units
Multiply the number of kilocalories by 3.96566683139 to get british thermal units.
Kilocalorie: The Calorie on food labels — 1000 small calories.
British thermal unit: International Table BTU, exactly 1055.055 852 62 J. HVAC capacity is quoted in BTU/h.
Kilocalorie to British thermal unit conversion table
| Kilocalories (kcal) | British thermal units (BTU) |
|---|---|
| 1 kcal | 3.965 666 8 |
| 2 kcal | 7.931 333 7 |
| 3 kcal | 11.897 |
| 5 kcal | 19.828 334 |
| 10 kcal | 39.656 668 |
| 20 kcal | 79.313 337 |
| 25 kcal | 99.141 671 |
| 50 kcal | 198.283 34 |
| 100 kcal | 396.566 68 |
| 250 kcal | 991.416 71 |
| 500 kcal | 1982.8334 |
| 1000 kcal | 3965.6668 |
British thermal unit to Kilocalorie conversion table
| British thermal units (BTU) | Kilocalories (kcal) |
|---|---|
| 1 BTU | 0.252 164 4 |
| 2 BTU | 0.504 328 8 |
| 3 BTU | 0.756 493 2 |
| 5 BTU | 1.260 822 |
| 10 BTU | 2.521 644 |
| 20 BTU | 5.043 288 |
| 25 BTU | 6.304 11 |
| 50 BTU | 12.608 22 |
| 100 BTU | 25.216 44 |
| 250 BTU | 63.0411 |
| 500 BTU | 126.0822 |
| 1000 BTU | 252.1644 |
Frequently asked
How many british thermal units are in a kilocalorie?
One kilocalorie equals 3.965666831 british thermal units (kcal → BTU). That figure is exact, not rounded.
How do you convert kilocalories to british thermal units?
Multiply the number of kilocalories by 3.96566683139 to get british thermal units.
What is 1 BTU in kilocalories?
One british thermal unit is 0.2521644007 kilocalories.
What is 10 kcal in BTU?
10 kcal = 39.656 668 BTU.
What exactly is a kilocalorie?
The Calorie on food labels — 1000 small calories.
What exactly is a british thermal unit?
International Table BTU, exactly 1055.055 852 62 J. HVAC capacity is quoted in BTU/h.