Megajoules to Therms Converter
Convert megajoules to therms — divide by 105.506. Results update as you type; exact factors shown.
One megajoule is 0.0095 therm (US) — see the exact factor, not a rounded rule of thumb.
How the megajoules to therms converter works
Energy converts through the joule. A thermochemical calorie is exactly 4.184 J, so a food Calorie (kcal) is 4.184 kJ. A kilowatt-hour is exactly 3.6 MJ. A BTU is 1,055.056 J and a US therm is 100,000 BTU.
Australia is fully metric under the National Measurement Act 1960; imperial units appear only in trade with the US and in older documents.
Common energy conversions
| From | To | Units |
|---|---|---|
| 10 MJ | 0.0948 thm | megajoules to therm (US) |
| 50 MJ | 0.4739 thm | megajoules to therm (US) |
| 100 MJ | 0.9478 thm | megajoules to therm (US) |
| 105.506 MJ | 1 thm | megajoules to therm (US) |
| 500 MJ | 4.7391 thm | megajoules to therm (US) |
| 1,000 MJ | 9.4782 thm | megajoules to therm (US) |
| 2,000 MJ | 18.9563 thm | megajoules to therm (US) |
| 5,000 MJ | 47.3909 thm | megajoules to therm (US) |
| 10,000 MJ | 94.7817 thm | megajoules to therm (US) |
| 20,000 MJ | 189.5634 thm | megajoules to therm (US) |
| 50,000 MJ | 473.9086 thm | megajoules to therm (US) |
| 100,000 MJ | 947.8171 thm | megajoules to therm (US) |
Units in this converter and their exact factors
| Unit | Symbol | One unit in joules |
|---|---|---|
| joule | J | 1 joule |
| kilojoule | kJ | 1,000 joule |
| megajoule | MJ | 1,000,000 joule |
| calorie (thermochemical) | cal | 4.184 joule |
| kilocalorie (food Calorie) | kcal | 4,184 joule |
| watt-hour | Wh | 3,600 joule |
| kilowatt-hour | kWh | 3,600,000 joule |
| British thermal unit | BTU | 1,055.05585262 joule |
| therm (US) | thm | 105,505,585.262 joule |
| foot-pound | ft·lb | 1.3558179483 joule |
FAQFrequently asked questions about energy conversion
How many megajoules in a therm?
105.506.
What is 1,000 MJ?
9.48 therms.
Why do gas bills differ so much between countries?
Because each market chose a different unit — megajoules in Australia, kilowatt-hours in the UK, therms in the US. The gas is the same.
What is 1 MJ in kWh?
0.278 kWh.
How much gas does a household use?
Australian households commonly use 15 to 60 GJ a year — 142 to 569 therms.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Measurement Institute (NMI) — Australia's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.