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Got a question, found a bug, or think a calculator's giving you the wrong answer? Reach out - we read everything.

Some things worth flagging when you write in:

Bug reports - tell us which calculator, what values you entered, and what went wrong. Screenshots help.
Feature requests - is there a calculator or visualizer you keep looking for and can't find? Let us know what it's for and we'll consider adding it.
Corrections - if a formula, explanation, or worked example looks off, point it out. Electronics has enough bad information online already; we'd rather fix it than repeat it.
Everything else - collaboration ideas, feedback on the site, or just to say what you're building.

We're a small operation, so replies might take a few days - but every message gets read.