How to Convert Therms to Megajoules (thm to MJ)
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 megajoules by hand, with examples and a quick-reference table.
The conversion
To convert therms to megajoules, multiply the value by 105.505585257. To go the other way, divide by the same number (or multiply by 0.0094781712). For a quick estimate, multiply by about 110.
Megajoules = therms × 105.505585257
Worked examples
- 3 thm = 316.5168 MJ
- 12.5 thm = 1,318.82 MJ
- 75 thm = 7,912.92 MJ
Therms to Megajoules table
| Therms | Megajoules |
|---|---|
| 1 thm | 105.5056 MJ |
| 2 thm | 211.0112 MJ |
| 5 thm | 527.5279 MJ |
| 10 thm | 1,055.06 MJ |
| 20 thm | 2,110.11 MJ |
| 25 thm | 2,637.64 MJ |
| 50 thm | 5,275.28 MJ |
| 100 thm | 10,550.56 MJ |
| 250 thm | 26,376.4 MJ |
| 500 thm | 52,752.79 MJ |
| 1,000 thm | 105,505.59 MJ |
Common questions
Is thm to MJ 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 Megajoules to Therms converter.
Mistakes to avoid
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
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.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
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.
For any value, use the Therms to Megajoules Converter or browse all energy converters.
Run your own numbers: Therms to Megajoules Converter