Working tools for radio and telecommunications: wavelength and frequency, power in dBm, mW and W, free-space path loss, channel capacity, and a link budget. Everything runs in your browser.
Wavelength & frequency
Convert between frequency and wavelength (λ = c / f).
Power: dBm / mW / W
Enter a power in any unit; see it in all three.
Free-space path loss
Ideal line-of-sight loss between two antennas.
Channel capacity
Shannon-Hartley limit, plus the Nyquist rate if you give a number of signal levels.
Link budget
Received power and margin. Total loss includes path loss and any other losses, in dB.