Decibel Sound & Power Calculator
Convert dB SPL, calculate power/voltage gain ratios, and convert dBm/dBW
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A comprehensive calculator for decibel (dB) units widely used in acoustics and electronics. Convert Sound Pressure Level (dB SPL) to Pascals, compute power/voltage gain ratios, and convert RF power units (dBm, dBW, W, mW).
How to use
- Select a tab at the top matching your interest: Sound Level, Gain Ratio, or Power Conversion.
- Enter the values in any input field to perform real-time calculation.
- Click the copy icon next to the results to copy them to your clipboard.
FAQ
- What is the difference between +3dB and +10dB in power?
- Decibels are logarithmic. In power ratios, a 3dB increase doubles the power (approx 2x), while a 10dB increase increases the power by exactly 10x. In contrast, for voltage, a 6dB increase doubles the signal.
- What level of sound causes pain to the human ear?
- Sound levels around 120 dB SPL are known as the threshold of pain. Expositions above 140 dB SPL (like jet takeoffs nearby) can cause immediate and permanent hearing damage.