About Engineering Calculator Hub

Engineering Calculator Hub is a free collection of calculators for students, technicians, engineers, educators and anyone who needs a quick, reliable engineering calculation.

Show the working

Every calculator states its formula, converts your inputs to SI units, and lists each step — so you can check the result, learn the method, and reuse it in your own work.

Honest precision

Results are rounded to significant figures you choose, because an answer is never more accurate than the numbers that went in.

Growing library

New calculators are added regularly across mechanical, electrical, civil and general engineering.