Free tools
Tools to understand your waist and build healthier habits
Simple, free calculators and printables for your waist, activity and everyday habits. They run in your browser, and nothing you enter is stored.
Our tools are screening and educational aids, not medical tests. They do not diagnose any condition. Read the full disclaimer.
Available now
Waist Check
Enter your waist, height and hips to see waist circumference, waist-to-height ratio and waist-to-hip ratio side by side. Works in centimeters and inches.
Waist-to-Height Ratio Calculator
Enter your waist and height to see your ratio, how your waist compares with half your height, and what the result means.
BMI + Waist Comparison
See your BMI and your waist-to-height ratio side by side, with notes on what each measure can and cannot tell you.
Weekly Exercise Goal Calculator
Enter your moderate and vigorous minutes and strength days to see how your week compares with the 150-minute guideline.
Coming soon
Walking Calculator
Turn steps or walking time into distance and time. In progress.
Weekly Habits Tracker
A printable weekly sheet for walking, strength sessions, stretching, water and an optional waist measurement. In progress.
How our tools work
Private
Calculations run in your browser. We do not store or send the numbers you enter, and you do not need to sign up.
Sourced
Each tool explains its method and lists its sources, such as the NHS, CDC, NIDDK and WHO, directly under the result.
Educational
Results are screening measures, not a diagnosis. They are written for adults, and are not suitable in pregnancy or for anyone with an eating disorder.
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