Baud Rate Calculator
Enter the bit rate and modulation level of a digital signal to calculate its baud rate (symbols transmitted per second).
What this calculator does
Baud rate is the number of signal changes (symbols) sent per second over a communication channel, while bit rate is the number of bits per second actually transmitted. They’re only equal when each symbol carries exactly one bit.
How the calculation works
The number of bits each symbol can carry is log base 2 of the number of modulation levels (M). Baud rate is then found by dividing the bit rate by bits per symbol: Baud = Bit Rate / log2(M). For example, a modulation scheme with 16 possible symbol states carries 4 bits per symbol.
This relationship is standard in digital communications and explains why higher-order modulation (more levels per symbol) can pack more data into the same baud rate, at the cost of being more sensitive to noise.