Free tools

Free Health and Wellness Calculators

Simple, private calculators for BMI, protein and bedtime. Get your number in seconds, then use our guides to turn it into a plan.

Our tools

Pick a calculator

See your body mass index, the WHO range it falls in and a healthy weight range for your height.

Check your BMI

Find the minimum daily protein suggested for most healthy adults, based on your weight.

Find your protein number

Enter your wake-up time to see when to be in bed for seven, eight or nine hours of sleep.

Plan your bedtime

Every calculator runs in your browser. Nothing you type is saved, sent or shared, so your health details stay with you.

Each tool explains how it works, links to its sources (such as the WHO and NIH) and states its limits. See our editorial process.

Educational, not medical advice

These tools give general figures for healthy adults. They do not diagnose anything or replace a doctor. Read our disclaimer.

Questions

Do you store the numbers I enter?

No. Every calculator runs in your browser. Nothing you enter is saved or sent to us, and it disappears when you reload the page.

Are the results medical advice?

No. The tools are educational and give general figures. They do not replace advice from a doctor, dietitian or other qualified professional.

Will you add more tools?

We plan to add more free tools over time. Tell us what you would like to see on our contact page.

Free step-by-step guides

Pair your results with a guide that turns numbers into simple habits.