Convert BTU to electronvolts

1 BTU=6.5851e21eV

Use the converter below to change any BTU value into electronvolts instantly — with formula, conversion table, and real-world examples.

You have

Equals

6.5851e21

Conversion formula

Forward

electronvolts = BTU × 6.5851e21

Reverse

BTU = electronvolts × 1.5186e-22

Example: 10 BTU × 6.5851e21 = 6.5851e22 eV.

About both units

From

British Thermal Unit

BTU

The British Thermal Unit equals approximately 1055 joules — the energy to raise 1 pound of water by 1 °F. Used for HVAC, heating, and air-conditioning capacity in the US. A 9000 BTU/h AC is a small room unit.

Real-world: Window AC: 5000–12,000 BTU/h. Central AC: 24,000–60,000 BTU/h. Home furnace: 60,000–100,000 BTU/h.

Read full british thermal unit reference →

Electronvolt

The electronvolt equals 1.602 × 10⁻¹⁹ joules — the energy gained by an electron accelerated through 1 volt. It is the natural energy unit of atomic, nuclear and particle physics. Chemical bonds are a few eV; LHC protons reach 7 TeV = 7 × 10¹² eV.

Real-world: Silicon band gap: 1.12 eV. Hydrogen ionization: 13.6 eV. LHC proton: 7 TeV. Photon wavelength 500 nm = 2.5 eV.

Read full electronvolt reference →

British Thermal Unit to Electronvolt conversion table

Common BTU to electronvolts values for quick reference.

British Thermal Unit (BTU)	Electronvolt (eV)
1 BTU	6.5851e21 eV
10 BTU	6.5851e22 eV
100 BTU	6.5851e23 eV
500 BTU	3.2926e24 eV
1,000 BTU	6.5851e24 eV
5,000 BTU	3.2926e25 eV
10,000 BTU	6.5851e25 eV
50,000 BTU	3.2926e26 eV
100,000 BTU	6.5851e26 eV
500,000 BTU	3.2926e27 eV

Tips & common mistakes

Quick tips

1 BTU = 1055.06 J = 0.293 Wh.
BTU/h (power) and BTU (energy) are different — don't confuse.
Tons of refrigeration: 12,000 BTU/h = 1 ton AC.

Avoid these

Confusing BTU and BTU/h — energy vs power.
Using kcal when BTU is requested in HVAC specs.
Treating all BTUs as exact — definitions vary (IT, thermochemical, etc.).

Frequently asked questions

How many electronvolts in a british thermal unit?

One british thermal unit equals 6.5851e21 electronvolts.

How do I convert BTU to electronvolts?

Multiply the british thermal unit value by 6.5851e21 to get the equivalent in electronvolts.

What is 100 BTU in electronvolts?

100 BTU equals 6.5851e23 electronvolts.

Is a british thermal unit bigger than a electronvolt?

Yes. 1 british thermal unit equals 6.5851e21 electronvolts, so one british thermal unit is larger.

How to convert BTU to electronvolts without a calculator?

Multiply by 6.5851e21 for a quick estimate; use a calculator for precise results.

Related energy conversions

📊 See full comparison matrix →

Conversions in other categories

WeightKilogram → Pound LengthKilometer → Mile TemperatureCelsius → Fahrenheit VolumeLiter → US Gallon AreaSquare Meter → Square Foot SpeedKilometer per Hour → Mile per Hour PressureBar → Pound per Square Inch PowerKilowatt → Mechanical Horsepower