Audio Maths Calculators
dB conversions, frequency-to-note, wavelength, speed of sound, power, voltage and Ohm's law calculators.
dB Conversion Calculator
Convert between dBu, dBV, dBFS, dBm and voltage or power values instantly. An essential daily reference calculator for audio engineers.
Frequency to Note Calculator
Find the closest musical note to any frequency with cents deviation from equal temperament. Free online audio reference calculator.
Wavelength Calculator
Calculate the wavelength of any sound wave at a given frequency and air temperature. Useful for speaker placement and room acoustics.
Speed of Sound Calculator
Calculate the speed of sound in air at any given temperature and humidity level. Useful for delay time alignment and acoustic design.
Audio Power Calculator
Calculate audio power from voltage and impedance, or find voltage from power and impedance. Essential for amplifier and speaker work.
Voltage Calculator
Calculate audio signal voltage from dBu or dBV decibel values and convert back to dB. Essential reference for gain staging and setup.
Ohm's Law Calculator
Calculate voltage, current, resistance and power for audio circuits using Ohm's law. Free online audio electronics reference tool.
Signal Chain Calculator
Calculate cumulative gain, noise floor and signal-to-noise ratio through a chain of audio components. Free online audio calculator.
8 free calculators in Audio Maths
Essential Audio Mathematics
Audio engineering relies on a specific set of mathematical relationships. The decibel is a logarithmic unit used throughout audio to express ratios of power, voltage and sound pressure. Different dB scales (dBu, dBV, dBFS, dBm) have different reference values, and converting between them requires understanding both the reference and whether the measurement is power-based or voltage-based.
dBu uses a reference of 0.775V (the voltage that produces 1 mW across 600 ohms), while dBV uses a reference of 1V. Professional audio equipment typically operates at +4 dBu (1.228V), while consumer equipment uses -10 dBV (0.316V) ā a difference of approximately 11.8 dB.
Ohm's law (V = IR) and the power equation (P = VĀ²/R) are fundamental to understanding speaker systems, amplifiers and signal levels. These calculators provide quick reference for the mathematical relationships that underpin all audio systems.