Pedalboard power calculator

How to figure out your pedalboard power

1. Find each pedal's current draw. It's printed in the manual or on the back of the pedal as mA (milliamps). The calculator fills it in for the 71 pedals in our list.
2. Add them up. That total is the least your supply must deliver.
3. Add headroom. We add 20% so the supply isn't running at its limit and you have room for one more pedal.
4. Count outlets. One per pedal is the quiet way to do it. Any pedal over 100 mA needs an outlet rated for its draw, since standard outlets on many supplies are 100 mA.
5. Check voltage and polarity. Most pedals are 9V center negative. Anything else needs a matching outlet or cable.

Analog vs. digital pedals

Analog drives, fuzzes and wahs are tiny loads. Most in our list draw under 30 mA, and some under 5 mA. Digital delays, reverbs, loopers and multi-effects are the hungry ones, often 100 to 500 mA each. One digital reverb can outdraw an entire row of overdrives.

Power draw of popular pedals

These are the makers' own published numbers, linked to the source. Where a maker publishes a minimum supply rating instead of a running draw, we use that rating.

Last updated November 14, 2026.