Convert british thermal units to kilocalories
1 BTU = 0.252164400722 kcal — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
More converter tools
Readable results
Ranges, ± tolerances, feet/inches and clock durations work in the value field.
Unit picker
Export this result
Show this value in all 39 energy & work units
- Petajoules PJ 1.05505585262e-12
- Terajoules TJ 1.05505585262e-9
- Gigajoules GJ 0.000 001 055 055 852 62
- Megajoules MJ 0.001 055 055 852 62
- Kilojoules kJ 1.055 055 852 62
- Joules J 1055.055 852 62
- Millijoules mJ 1 055 055.852 62
- Microjoules µJ 1 055 055 852.62
- Nanojoules nJ 1 055 055 852 620
- Watt-hours Wh 0.293 071 070 172
- Kilowatt-hours kWh 0.000 293 071 070 172
- Megawatt-hours MWh 0.000 000 293 071 070 172
- Gigawatt-hours GWh 2.93071070172e-10
- Terawatt-hours TWh 2.93071070172e-13
- Calorie (thermochemical)s cal 252.164 400 722
- Kilocalories kcal 0.252 164 400 722
- Calorie (IT)s cal (IT) 251.995 761 111
- Kilocalorie (IT)s kcal (IT) 0.251 995 761 111
- British thermal units BTU 1
- BTU (thermochemical)s BTU (th) 1.000 669 467 08
- Million BTUs MMBTU 0.000 001
- Therm (US)s thm 0.000 010 002 387 672 2
- Therm (EC)s thm (EC) 0.000 009 999 998 603 11
- Electronvolts eV 6.58514067819e+21
- Kiloelectronvolts keV 6.58514067819e+18
- Megaelectronvolts MeV 6 585 140 678 190 000
- Gigaelectronvolts GeV 6 585 140 678 190
- Teraelectronvolts TeV 6 585 140 678.19
- Ergs erg 10 550 558 526.2
- Foot-pounds ft·lbf 778.169 262 266
- Inch-pounds in·lbf 9338.031 147 19
- Foot-poundals ft·pdl 25 036.855 629 3
- Horsepower-hours hp·h 0.000 393 014 778 922
- Tonne of TNTs t TNT 0.000 000 252 164 400 722
- Kiloton of TNTs kt TNT 2.52164400722e-10
- Megaton of TNTs Mt TNT 2.52164400722e-13
- Hartrees Eₕ 2.41999456355e+20
- Rydbergs Ry 4.8399891271e+20
- Quads quad 1e-15
Every row is British thermal unit (BTU) converted through the joule, in exact rational arithmetic.
How to convert british thermal units to kilocalories
Multiply the number of british thermal units by 0.252164400722 to get kilocalories.
British thermal unit: International Table BTU, exactly 1055.055 852 62 J. HVAC capacity is quoted in BTU/h.
Kilocalorie: The Calorie on food labels — 1000 small calories.
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 |
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 |
Frequently asked
How many kilocalories are in a british thermal unit?
One british thermal unit equals 0.2521644007 kilocalories (BTU → kcal). That figure is exact, not rounded.
How do you convert british thermal units to kilocalories?
Multiply the number of british thermal units by 0.252164400722 to get kilocalories.
What is 1 kcal in british thermal units?
One kilocalorie is 3.965666831 british thermal units.
What is 10 BTU in kcal?
10 BTU = 2.521 644 kcal.
What exactly is a british thermal unit?
International Table BTU, exactly 1055.055 852 62 J. HVAC capacity is quoted in BTU/h.
What exactly is a kilocalorie?
The Calorie on food labels — 1000 small calories.