How to Convert British thermal units to Electronvolts (BTU to eV)
Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU. This guide shows how to convert british thermal units into electronvolts by hand, with examples and a quick-reference table.
The conversion
To convert british thermal units to electronvolts, multiply the value by 6.585141e+21. To go the other way, divide by the same number (or multiply by 1.518570e-22). For a quick estimate, multiply by about 6,600,000,000,000,000,000,000.
Electronvolts = british thermal units × 6.585141e+21
Worked examples
- 3 BTU = 1.975542e+22 eV
- 12.5 BTU = 8.231426e+22 eV
- 75 BTU = 4.938855e+23 eV
British thermal units to Electronvolts table
| British thermal units | Electronvolts |
|---|---|
| 1 BTU | 6.585141e+21 eV |
| 2 BTU | 1.317028e+22 eV |
| 5 BTU | 3.292570e+22 eV |
| 10 BTU | 6.585141e+22 eV |
| 20 BTU | 1.317028e+23 eV |
| 25 BTU | 1.646285e+23 eV |
| 50 BTU | 3.292570e+23 eV |
| 100 BTU | 6.585141e+23 eV |
| 250 BTU | 1.646285e+24 eV |
| 500 BTU | 3.292570e+24 eV |
| 1,000 BTU | 6.585141e+24 eV |
Common questions
Is BTU to eV exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Electronvolts to British thermal units converter.
Mistakes to avoid
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Background
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
For any value, use the British thermal units to Electronvolts Converter or browse all energy converters.
Run your own numbers: British thermal units to Electronvolts Converter