How to Convert Therms to British thermal units (thm to BTU)
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 therms into british thermal units by hand, with examples and a quick-reference table.
The conversion
To convert therms to british thermal units, multiply the value by 100,000.000243589. To go the other way, divide by the same number (or multiply by 1.000000e-05). For a quick estimate, multiply by about 100,000.
British thermal units = therms × 100,000.000243589
Worked examples
- 3 thm = 300,000 BTU
- 12.5 thm = 1,250,000 BTU
- 75 thm = 7,500,000.02 BTU
Therms to British thermal units table
| Therms | British thermal units |
|---|---|
| 1 thm | 100,000 BTU |
| 2 thm | 200,000 BTU |
| 5 thm | 500,000 BTU |
| 10 thm | 1,000,000 BTU |
| 20 thm | 2,000,000 BTU |
| 25 thm | 2,500,000.01 BTU |
| 50 thm | 5,000,000.01 BTU |
| 100 thm | 10,000,000.02 BTU |
| 250 thm | 25,000,000.06 BTU |
| 500 thm | 50,000,000.12 BTU |
| 1,000 thm | 100,000,000.24 BTU |
Common questions
Is thm to BTU 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 British thermal units to Therms converter.
Mistakes to avoid
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.
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.
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Background
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.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
For any value, use the Therms to British thermal units Converter or browse all energy converters.
Run your own numbers: Therms to British thermal units Converter