dBm to Watts
Calculate dBm to Watts instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
dBm to Watts
dBm
Power
1W
More about: dBm to Watts
What it calculates
The “dBm to Watts” calculator computes Power in W from 1 parameter: dbm.
A standard physics formula used in educational and engineering tasks.
Example calculation
With parameters dBm = 30 the result is 1 W (10^(dBm/10) / 1000).
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.