Convert calorie (thermochemical)s to british thermal units
1 cal = 0.00396566683139 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-15
- Terajoules TJ 4.184e-12
- Gigajoules GJ 4.184e-9
- Megajoules MJ 0.000 004 184
- Kilojoules kJ 0.004 184
- Joules J 4.184
- Millijoules mJ 4184
- Microjoules µJ 4 184 000
- Nanojoules nJ 4 184 000 000
- Watt-hours Wh 0.001 162 222 222 22
- Kilowatt-hours kWh 0.000 001 162 222 222 22
- Megawatt-hours MWh 1.16222222222e-9
- Gigawatt-hours GWh 1.16222222222e-12
- Terawatt-hours TWh 1.16222222222e-15
- Calorie (thermochemical)s cal 1
- Kilocalories kcal 0.001
- Calorie (IT)s cal (IT) 0.999 331 231 489
- Kilocalorie (IT)s kcal (IT) 0.000 999 331 231 489
- British thermal units BTU 0.003 965 666 831 39
- BTU (thermochemical)s BTU (th) 0.003 968 321 714 8
- Million BTUs MMBTU 3.96566683139e-9
- Therm (US)s thm 3.96661370264e-8
- Therm (EC)s thm (EC) 3.96566627743e-8
- Electronvolts eV 2.61144739675e+19
- Kiloelectronvolts keV 2.61144739675e+16
- Megaelectronvolts MeV 26 114 473 967 500
- Gigaelectronvolts GeV 26 114 473 967.5
- Teraelectronvolts TeV 26 114 473.9675
- Ergs erg 41 840 000
- Foot-pounds ft·lbf 3.085 960 032 58
- Inch-pounds in·lbf 37.031 520 390 9
- Foot-poundals ft·pdl 99.287 827 931 3
- Horsepower-hours hp·h 0.000 001 558 565 673 02
- Tonne of TNTs t TNT 1e-9
- Kiloton of TNTs kt TNT 1e-12
- Megaton of TNTs Mt TNT 1e-15
- Hartrees Eₕ 9.59689217281e+17
- Rydbergs Ry 1.91937843456e+18
- Quads quad 3.96566683139e-18
Every row is Calorie (thermochemical) (cal) converted through the joule, in exact rational arithmetic.
How to convert calorie (thermochemical)s to british thermal units
Multiply the number of calorie (thermochemical)s by 0.00396566683139 to get british thermal units.
Calorie (thermochemical): Exactly 4.184 J. The "small" calorie.
British thermal unit: International Table BTU, exactly 1055.055 852 62 J. HVAC capacity is quoted in BTU/h.
Calorie (thermochemical) to British thermal unit conversion table
| Calorie (thermochemical)s (cal) | British thermal units (BTU) |
|---|---|
| 1 cal | 0.003 965 666 8 |
| 2 cal | 0.007 931 333 7 |
| 3 cal | 0.011 897 |
| 5 cal | 0.019 828 334 |
| 10 cal | 0.039 656 668 |
| 20 cal | 0.079 313 337 |
| 25 cal | 0.099 141 671 |
| 50 cal | 0.198 283 34 |
| 100 cal | 0.396 566 68 |
| 250 cal | 0.991 416 71 |
| 500 cal | 1.982 833 4 |
| 1000 cal | 3.965 666 8 |
British thermal unit to Calorie (thermochemical) conversion table
| British thermal units (BTU) | Calorie (thermochemical)s (cal) |
|---|---|
| 1 BTU | 252.1644 |
| 2 BTU | 504.3288 |
| 3 BTU | 756.4932 |
| 5 BTU | 1260.822 |
| 10 BTU | 2521.644 |
| 20 BTU | 5043.288 |
| 25 BTU | 6304.11 |
| 50 BTU | 12 608.22 |
| 100 BTU | 25 216.44 |
| 250 BTU | 63 041.1 |
| 500 BTU | 126 082.2 |
| 1000 BTU | 252 164.4 |
Frequently asked
How many british thermal units are in a calorie (thermochemical)?
One calorie (thermochemical) equals 0.003965666831 british thermal units (cal → BTU). That figure is exact, not rounded.
How do you convert calorie (thermochemical)s to british thermal units?
Multiply the number of calorie (thermochemical)s by 0.00396566683139 to get british thermal units.
What is 1 BTU in calorie (thermochemical)s?
One british thermal unit is 252.1644007 calorie (thermochemical)s.
What is 10 cal in BTU?
10 cal = 0.039 656 668 BTU.
What exactly is a calorie (thermochemical)?
Exactly 4.184 J. The "small" calorie.
What exactly is a british thermal unit?
International Table BTU, exactly 1055.055 852 62 J. HVAC capacity is quoted in BTU/h.