US therm to Milliwatt
Compare US therm and Milliwatt. See why these engineering units measure different physical quantities, plus links to valid conversions.
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Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
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Some unit families need one extra value for a physically accurate result.
Use the converter to see the formula.
US therm and Milliwatt measure different quantities, so no single result applies.
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Formula
US therm (therm) measures energy, while Milliwatt (mW) measures power. These are different physical quantities, so there is no single multiplication factor that converts one into the other.
therm relates to its own energy base unit by a factor of 105480400. mW relates to its own power base unit by a factor of 0.001.
Conversion table
| US therm (therm) | 105480400 × energy base unit |
| Milliwatt (mW) | 0.001 × power base unit |
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Frequently asked questions
Can US therm be converted to Milliwatt?
Not directly. US therm measures energy and Milliwatt measures power. Converting between different physical quantities needs an extra physical relationship (such as area, distance, or time), not just a unit ratio.
What is US therm used for?
The US therm (therm) is a unit of energy. US therm used for natural gas energy.
What is Milliwatt used for?
The Milliwatt (mW) is a unit of power. Milliwatt is 0.001 watt units.
Why does the converter show an incompatible units message?
The Universal Converter only calculates a numeric result when both units share the same physical dimension. Since US therm and Milliwatt don't, the tool flags them as not directly compatible rather than returning a meaningless number.
What should I convert US therm to instead?
Use another energy unit, such as one of the related US therm conversions linked below.
What should I convert Milliwatt to instead?
Use another power unit, such as one of the related Milliwatt conversions linked below.
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About this conversion
This page compares US therm (therm) and Milliwatt (mW) within the engineering converter.
US therm used for natural gas energy. Milliwatt is 0.001 watt units.
Because US therm measures energy and Milliwatt measures power, the two units are not directly convertible: there is no fixed ratio that turns one into the other without additional information.
The calculator above will report that these units are not compatible. For a working result, choose two units from the same measurement family — see the related conversions below.