Signal & dB Formulas
Signal and decibel formulas express gain, loss, and ratios on the logarithmic scale that engineers use every day. These calculators convert between linear ratios and decibels for both voltage and power. They are essential for amplifier design, link budgets, and audio level matching.
Signal & dB Formula Calculators
- dB (Power) dB = 10 × log₁₀(P2/P1)
- dB (Voltage) dB = 20 × log₁₀(V2/V1)
- dBm to Watts P = 10^((dBm − 30) / 10)
- dBV (Voltage Level) dBV = 20 × log10(V / 1V)
- dBu (Voltage Level) dBu = 20 × log10(V / 0.7746V)
- dBm to dBW Conversion dBW = dBm − 30
- Receiver Noise Floor NF_floor = −174 + NF + 10×log10(BW)
- Effective Number of Bits ENOB = (SINAD − 1.76) / 6.02
- SINAD from ADC Bits SINAD = 6.02 × N + 1.76
- Octave & Decade Frequency Spans octaves = log2(f2/f1), decades = log10(f2/f1)
- THD + N THD+N = √(Vharm² + Vnoise²) / V1
- Noise-Equivalent Bandwidth (1-pole) NEB = (π/2) · f−3dB
Related Formula Categories
Browse the full formulas index for all 32 categories.