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British Thermal Units to Electronvolts Converter

Convert British thermal units (IT) (Btu) to electronvolts (eV), 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
6.58514067819 × 10²¹ eV
joules (watt-seconds)
1,055.05585262 J
kilojoules
1.05505585262 kJ
megajoules
0.00105505585262 MJ
gigajoules
1.05505585262 × 10⁻⁶ GJ
calories (thermochemical)
252.164400722 cal
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
kiloelectronvolts
6.58514067819 × 10¹⁸ keV
megaelectronvolts
6.58514067819 × 10¹⁵ MeV

1 Btu = 6.58514067819 × 10²¹ eV

Show the working
  1. 1 Btu = 6.58514067819e21 eV
  2. 1 × 6.58514067819e21 = 6.58514067819e21 eV

How to convert british thermal units to electronvolts

1 Btu = 6.58514067819 × 10²¹ eV, so multiply by 6.58514067819 to go from British thermal units (IT) to electronvolts. Going the other way, 1 eV = 1.51857044347 × 10⁻²² Btu.

eV = Btu × 6.58514067819
Btu = eV × 1.51857044347

Worked example:

1 Btu = 6.58514067819e21 eV
5 × 6.58514067819e21 = 3.2925703391e22 eV

British Thermal Units to electronvolts table

British Thermal UnitsElectronvolts
1 Btu6.58514067819 × 10²¹ eV
2 Btu1.31702813564 × 10²² eV
3 Btu1.97554220346 × 10²² eV
4 Btu2.63405627128 × 10²² eV
5 Btu3.2925703391 × 10²² eV
6 Btu3.95108440691 × 10²² eV
7 Btu4.60959847473 × 10²² eV
8 Btu5.26811254255 × 10²² eV
9 Btu5.92662661037 × 10²² eV
10 Btu6.58514067819 × 10²² eV
15 Btu9.87771101729 × 10²² eV
20 Btu1.31702813564 × 10²³ eV
25 Btu1.64628516955 × 10²³ eV
30 Btu1.97554220346 × 10²³ eV
40 Btu2.63405627128 × 10²³ eV
50 Btu3.2925703391 × 10²³ eV
75 Btu4.93885550864 × 10²³ eV
100 Btu6.58514067819 × 10²³ eV
250 Btu1.64628516955 × 10²⁴ eV
500 Btu3.2925703391 × 10²⁴ eV
1000 Btu6.58514067819 × 10²⁴ eV

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.
Electronvolts (eV)
Electronvolts, a specialised unit. Definition: NIST CODATA: elementary charge (exact since the 2019 SI redefinition).

Formula version 0.1.0Reviewed