US therm used for natural gas energy.
US therms to Millijoules Converter — therm to mJ
Convert US therm (therm) to Millijoule (mJ) using the exact conversion factor (1 us therm = 105,480,400,000 millijoule). See the formula, worked examples, and conversion table.
US therms to Millijoules converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Millijoule is 0.001 joule units.
Result = input x 1.054804e+8 / 0.001.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting US therms to Millijoules
US therm and Millijoule both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: US therm used for natural gas energy, and millijoule is 0.001 joule units.
Formula
millijoules = us therms × 105480400000
This factor comes from each unit's defined relationship to the category's base unit: 1 us therm equals 105480400 base units, and 1 millijoule equals 0.001 base units, so dividing one by the other gives the direct us therm-to-millijoule factor of 105480400000.
Simple example
1 therm × 105480400000 = 105,480,400,000 mJ
1 us therm = 105,480,400,000 millijoules.
Real-world example
100 therm × 105480400000 = 1.054804e+13 mJ
100 us therms = 1.054804e+13 millijoules.
Conversion table
| US therm (therm) | Millijoule (mJ) |
|---|---|
| 1 therm | 105,480,400,000 mJ |
| 10 therm | 1.054804e+12 mJ |
| 50 therm | 5.27402e+12 mJ |
| 100 therm | 1.054804e+13 mJ |
| 500 therm | 5.27402e+13 mJ |
| 1,000 therm | 1.054804e+14 mJ |
Reverse conversion: Millijoule to US therm
1 mJ × 9.480434e-12 = 9.480434e-12 therm
1 millijoule = 9.480434e-12 us therms.
us therms = millijoules × 9.480434e-12
For a page dedicated to this direction, see Millijoule to US therm.
Understanding the US therm (therm)
US therm used for natural gas energy.
Understanding the Millijoule (mJ)
Millijoule is 0.001 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many millijoules are in 1 us therm?
1 us therm equals 105,480,400,000 millijoules, using the exact defined conversion factor rather than an estimate.
How do I convert us therm to millijoule?
Multiply the us therm value by 105480400000. The converter above does this instantly to whatever precision you set.
How do I convert millijoule back to us therm?
Use the reverse factor: 1 millijoule equals 9.480434e-12 us therms. You can also use the swap control in the converter above to flip the direction instantly.
What is a us therm?
US therm (therm) is a unit of engineering.
What is a millijoule?
Millijoule (mJ) is a unit of engineering.
Is the us therm to millijoule conversion exact?
Yes. Both us therm and millijoule are defined by fixed standards rather than physical artifacts, so the factor of 105480400000 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.