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Power converter

milliwatt to IT BTU per hour

Convert milliwatt (mW) to IT BTU per hour (BTU/h). Use an editable power converter, conversion formula, and reference table.

0.003412141633

1 mW = 0.003412141633 BTU/h

Calculated in your browser

Conversion formula

BTU/h = mW × 0.003412141633

One milliwatt equals 0.003412141633 IT BTU per hour. Multiply your value in milliwatt by this factor to get IT BTU per hour. For the reverse conversion, divide by the same factor.

Worked example

To convert 5 milliwatt:
5 × 0.003412141633 = 0.01706070817 BTU/h

Conversion table

milliwatt (mW)IT BTU per hour (BTU/h)
0.010.00003412141633
0.10.0003412141633
10.003412141633
20.006824283266
50.01706070817
100.03412141633
250.08530354083
500.1706070817
1000.3412141633
10003.412141633

About these measurements

Power is the rate of energy transfer.

The base reference used here is the watt. One milliwatt is 0.001 base units; one IT BTU per hour is 0.2930710702 base units.

Important distinctions

Mechanical horsepower and metric horsepower are distinct units.

Precision

The converter uses stored conversion factors and floating-point arithmetic. Results display up to ten significant digits, switching to scientific notation for very small or large values. Keep the precision of your original measurement when reporting results.

Common questions

How do I convert mW to BTU/h?

Multiply the quantity in mW by 0.003412141633. You can also type the value into the converter above.

Can I reverse the conversion?

Yes. Use the swap button or open the IT BTU per hour to milliwatt converter.

Reference

NIST Guide to the SI — conversion factors and prefix conventions. SI prefixes scale units by powers of ten; the dimension-specific notes above describe the assumptions used on this page.

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