// multi-utility computation suite · offline · instant · precise
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eng.Shannon-channel-capacity Calculator
Calculates the Shannon channel capacity (C = B × log₂(1 + SNR)) in bits per second from bandwidth and SNR. Shannon capacity is the theoretical maximum — practical modulation schemes (16-QAM, 64-QAM) achieve 60–80% of Shannon capacity.
Inputs
Bandwidth Hz
Horizontal extent perpendicular to the length.
Snr Db
Reference formula or conversion factor shown for context.
Spectral Efficiency Bits S Hz
Useful output divided by total input, as a percentage. 100% is impossible due to losses (heat, friction, resistance).
Results
channel capacity C (Mbps)
Sample size or count used in the calculation.
spectral efficiency (bits/s/Hz)
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.