Our purpose
Fitness numbers can be useful when they are easy to calculate and interpreted with appropriate context. Our goal is to help people estimate, plan, and track without creating an account or sharing sensitive measurements.
What we prioritize
Results use plain language and include practical reference points.
Calculator entries are processed locally and are not stored.
We explain the limitations of estimates and never present them as diagnoses.
Every calculator is free and responsive across desktop, tablet, and mobile.
A responsible starting point
Our calculators are educational tools. They cannot account for every health condition, training history, body type, or measurement error. Use them to support—not replace—qualified professional guidance.