Converter category
Sound Converter
Convert between decibel ratios, dBm, dBu, dBV, watt, volt, and sound pressure level (pascals) for audio engineering.
Universal Sound Converter
About sound conversions
Sound and audio conversions are essential for acoustics, professional audio, broadcasting, telecommunications, and noise control. Our sound converter handles decibel ratios, power ratios, and absolute levels including dBm, dBu, and dBV. It also converts sound pressure level in dB SPL to pascals, and decibel-milliwatts to watts. These are logarithmic conversions, so they require exponentiation rather than simple multiplication. Whether you are calibrating microphones, designing amplifiers, setting broadcast levels, or analyzing environmental noise, this converter provides accurate audio-level results.
Most popular sound conversions
Available units
Popular sound conversions (7 total)
Unit definitions
Sound Pressure Level (dB SPL)
dB SPL measures sound pressure relative to the threshold of human hearing (20 μPa).
Origin: Reference level set at 0 dB = 20 micropascals.
Current use: Audio engineering, Noise measurement, Hearing protection
dBm (dBm)
dBm is decibels relative to 1 milliwatt. Used for radio frequency power.
Origin: Telecommunications standard for power measurement.
Current use: Wireless communications, RF engineering, Audio equipment
dBu (dBu)
dBu is decibels relative to 0.775 volts. Studio audio reference level.
Origin: Reference voltage of 0.775 VRMS established in broadcasting.
Current use: Professional audio, Studio equipment, Broadcasting
dBV (dBV)
dBV is decibels relative to 1 volt RMS. Consumer audio equipment.
Origin: Consumer audio standard reference.
Current use: Consumer audio, Home theater, Line-level signals
Pascal (Pa)
The pascal is the SI unit of pressure, defined as one newton per square meter.
Origin: Named after Blaise Pascal, French mathematician and physicist.
Current use: Scientific research, Engineering, Meteorology
Common uses for sound conversions
Sound conversions are used for microphone calibration, audio engineering, amplifier gain, noise measurements, RF power, broadcast levels, and acoustics.
Frequently asked questions about sound
What is the difference between dB SPL and dBm?+
dB SPL measures sound pressure relative to 20 micropascals. dBm measures electrical power relative to 1 milliwatt.
How many pascals is 94 dB SPL?+
94 dB SPL equals approximately 1 pascal.
Why are decibel conversions not linear?+
Decibels are logarithmic. Converting dB to a linear value requires raising 10 to the power of dB divided by 10 or 20.