Free tools, built to be actually useful.
SH Fitness Tools is a collection of calculators for training and nutrition — built to be fast, accurate and free, with no sign-up and no paywalls.
Why we built this
Most fitness calculators online are cluttered with ads, inaccurate formulas, or hidden behind a sign-up wall. We wanted a set of tools that respects your time — enter your numbers, get a clear answer.
How our calculators work
Every calculator uses established, published formulas — the same ones used in strength and conditioning, sports science and clinical nutrition — explained in plain language alongside the result.
Who it's for
Whether you're just starting out or you've been training for years, SH Fitness Tools is built for anyone who wants a quick, reliable number to work from — no account required.
A quick note on accuracy
Every calculator on this site gives a general estimate based on population-level formulas — they're a useful starting point, not a diagnosis or a substitute for professional advice. See our disclaimer for more detail.
Explore the calculators
16 free tools across nutrition, body composition, strength and cardio.
Browse All Calculators