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British Thermal Units Converter

Convert British thermal units (IT) (Btu) to other units, with every conversion from 1 Btu listed.

Change the values and press Calculate to work out your own figures.

Enter an amount of energy, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

About valueA number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
About toThe unit you want the answer in. Swap exchanges the two units.
Result
Result
252.164400722 cal
joules (watt-seconds)
1,055.05585262 J
kilojoules
1.05505585262 kJ
megajoules
0.00105505585262 MJ
gigajoules
1.05505585262 × 10⁻⁶ GJ
kilocalories (food Calories)
0.252164400722 kcal
megacalories
0.000252164400722 Mcal
watt-hours
0.293071070172 Wh
kilowatt-hours
0.000293071070172 kWh
megawatt-hours
2.93071070172 × 10⁻⁷ MWh
million Btu
1 × 10⁻⁶ MMBtu
therms (100,000 Btu)
1 × 10⁻⁵ thm
quads (10¹⁵ Btu)
1 × 10⁻¹⁵ quad
electronvolts
6.58514067819 × 10²¹ eV
kiloelectronvolts
6.58514067819 × 10¹⁸ keV
megaelectronvolts
6.58514067819 × 10¹⁵ MeV

1 Btu = 252.164400722 cal

Show the working
  1. 1 Btu = 252.164400722 cal
  2. 1 × 252.164400722 = 252.164400722 cal

1 Btu in other units

About the units

British Thermal Units (Btu)
British thermal units (IT), a US customary unit. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.

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