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Kiloelectronvolts to British Thermal Units Converter

Convert kiloelectronvolts (keV) to British thermal units (IT) (Btu), with the formula, a conversion table and exact factors.

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.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
1.51857044347 × 10⁻¹⁹ Btu
joules (watt-seconds)
1.602176634 × 10⁻¹⁶ J
kilojoules
1.602176634 × 10⁻¹⁹ kJ
megajoules
1.602176634 × 10⁻²² MJ
gigajoules
1.602176634 × 10⁻²⁵ GJ
calories (thermochemical)
3.82929405832 × 10⁻¹⁷ cal
kilocalories (food Calories)
3.82929405832 × 10⁻²⁰ kcal
megacalories
3.82929405832 × 10⁻²³ Mcal
watt-hours
4.45049065 × 10⁻²⁰ Wh
kilowatt-hours
4.45049065 × 10⁻²³ kWh
megawatt-hours
4.45049065 × 10⁻²⁶ MWh
million Btu
1.51857044347 × 10⁻²⁵ MMBtu
therms (100,000 Btu)
1.51857044347 × 10⁻²⁴ thm
quads (10¹⁵ Btu)
1.51857044347 × 10⁻³⁴ quad
electronvolts
1,000 eV
megaelectronvolts
0.001 MeV

1 keV = 1.51857044347 × 10⁻¹⁹ Btu

Show the working
  1. 1 keV = 1.51857044347e-19 Btu
  2. 1 × 1.51857044347e-19 = 1.51857044347e-19 Btu

How to convert kiloelectronvolts to british thermal units

1 keV = 1.51857044347 × 10⁻¹⁹ Btu, so multiply by 1.51857044347 to go from kiloelectronvolts to British thermal units (IT). Going the other way, 1 Btu = 6.58514067819 × 10¹⁸ keV.

Btu = keV × 1.51857044347
keV = Btu × 6.58514067819

Worked example:

1 keV = 1.51857044347e-19 Btu
5 × 1.51857044347e-19 = 7.59285221736e-19 Btu

Kiloelectronvolts to british thermal units table

KiloelectronvoltsBritish Thermal Units
1 keV1.51857044347 × 10⁻¹⁹ Btu
2 keV3.03714088694 × 10⁻¹⁹ Btu
3 keV4.55571133041 × 10⁻¹⁹ Btu
4 keV6.07428177388 × 10⁻¹⁹ Btu
5 keV7.59285221736 × 10⁻¹⁹ Btu
6 keV9.11142266083 × 10⁻¹⁹ Btu
7 keV1.06299931043 × 10⁻¹⁸ Btu
8 keV1.21485635478 × 10⁻¹⁸ Btu
9 keV1.36671339912 × 10⁻¹⁸ Btu
10 keV1.51857044347 × 10⁻¹⁸ Btu
15 keV2.27785566521 × 10⁻¹⁸ Btu
20 keV3.03714088694 × 10⁻¹⁸ Btu
25 keV3.79642610868 × 10⁻¹⁸ Btu
30 keV4.55571133041 × 10⁻¹⁸ Btu
40 keV6.07428177388 × 10⁻¹⁸ Btu
50 keV7.59285221736 × 10⁻¹⁸ Btu
75 keV1.1389278326 × 10⁻¹⁷ Btu
100 keV1.51857044347 × 10⁻¹⁷ Btu
250 keV3.79642610868 × 10⁻¹⁷ Btu
500 keV7.59285221736 × 10⁻¹⁷ Btu
1000 keV1.51857044347 × 10⁻¹⁶ Btu

About the units

Kiloelectronvolts (keV)
Kiloelectronvolts, a specialised unit. Definition: NIST CODATA: elementary charge (exact since the 2019 SI redefinition).
British Thermal Units (Btu)
British thermal units (IT), a US customary unit. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.

Formula version 0.1.0Reviewed