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Convert mW to BTU/s instantly with an accurate, free calculator. Type any value to see the result update.
Uses the International Table definition: 1 BTU (IT) = 1,055.05585262 joules, not the thermochemical BTU. Source: NIST Guide for the Use of the International System of Units.
One milliwatts equals 0.000000947817 BTU/s. This value is calculated by the same conversion engine used above.
Use the formula mW × 0.000000947817. For example, 1000 mW equals 0.000947817 BTU/s.
1000 mW is 0.000947817 BTU/s.
Yes. The converter is free to use, requires no account, and updates the result as you type.
