dBm and watts conversion
Convert absolute power relative to one milliwatt.
Inputs
Calculations run in your browser. Your input values are not submitted or saved.
Results
- Power
- 1 W
dBm is referenced to 1 mW; do not confuse it with dB, a ratio of two powers.
Formula & guidance
P(W)=10^(dBm/10)/1000
dBm is referenced to 1 mW; do not confuse it with dB, a ratio of two powers.
Change the example inputs and check each field’s units. Use equipment datasheets and applicable project standards for final decisions. Results do not establish Canadian electrical-code compliance or certify a design.