dBm Converter
Convert dBm to milliwatts, watts, and back with a logarithmic RF power calculator for wireless, audio, electronics, telecom, and signal-level analysis.
dBm Power Calculator
Choose the direction and enter a value. dBm is logarithmic, not a linear multiplier.
Result updates automatically.
Formula appears here.
How dBm Conversion Works
dBm expresses power relative to 1 milliwatt on a logarithmic scale. A 10 dB increase means ten times the power, while a 3 dB increase is roughly double the power.
dBm to mW
mW = 10^(dBm / 10)
mW to dBm
dBm = 10 × log10(mW)
W to dBm
dBm = 10 × log10(W × 1000)
Power Formula Notes
Use dBm for RF signal levels, transmit power, receiver sensitivity, link budgets, and electronics references.
dBm Converter FAQ
What does dBm mean?
dBm means decibels relative to one milliwatt. It is a logarithmic power unit commonly used in RF and electronics.
How do I convert dBm to watts?
First calculate milliwatts with mW = 10^(dBm / 10), then divide by 1000 to get watts.
Is dBm a linear unit?
No. dBm is logarithmic, so it cannot be converted with a simple multiplication factor.