Engineering calculators, formulas and worked solutions.
For electrical and electronic engineering, telecommunications, digital systems, and engineering mathematics.
Working across several calculators at once? Open the workspace
Electrical & Electronics
Telecommunications
Digital Systems
Engineering Mathematics
About this site
Velorsen is a reference site built alongside an electronic engineering degree. Each calculator shows the formula it uses and a worked example, not just a final number — the goal is to check your working, not replace it.
More about Velorsen — what the site covers, how the calculations are checked, and who runs it.