Find the preamp gain needed for a healthy but clipping-free signal.
Subtracting the mic-level input from a chosen target tells you how much preamp gain to apply, with headroom being the inverse of that target. Setting gain too hot clips instantly while too low buries the signal in noise, so aiming at -18 dBFS balances both in one step.
Microphone Gain
Gain dB = target level - input level; boost = 10^(gain/20)
Gain dB = target level - input level; boost = 10^(gain/20) Subtracting the mic-level input from a chosen target tells you how much preamp gain to apply, with headroom being the inverse of that target.
Setting gain too hot clips instantly while too low buries the signal in noise, so aiming at -18 dBFS balances both in one step.
This calculator takes 2 inputs: Mic/preamp input, Target output. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.