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Optical Power (dB / dBm / Watts) Converter

Convert between absolute and logarithmic power units

Absolute Power

Watts (W)

Milliwatts (mW)

Microwatts (µW)

dBm

dBW

Linear Ratio (P₁/P₂)

Percent (%)

dBm = 10 × log₁₀(P_mW) · dB = 10 × log₁₀(P₁/P₂)
0 dBm = 1 mW · 30 dBm = 1 W · -30 dBm = 1 µW