About CalculatorCentrum

CalculatorCentrum is a growing collection of free, focused calculators for engineers, makers, and students. It currently offers 37calculators across 3 categories, starting with electronics and low-power IoT, with more categories planned.

How it works

Every tool runs entirely in your browser — there are no accounts, no sign-ups, and nothing you type is uploaded to a server. Each calculator shows its formulas and a short explanation so you can check the method, not just the number.

Our aim

Fast, accurate, single-purpose tools that load quickly and get out of your way. Where a calculation relies on an approximation or a standard (for example IPC-2221 for PCB traces, or IEC 60751 for RTDs), we say so, so you know when to reach for a more detailed method.

Feedback

Spotted a mistake or want a calculator added? We'd genuinely like to hear it — see the contact page.