Caliper: BMI Calculator

Your BMI with full context. Body fat estimate, waist-to-height ratio, and exactly how far you are from a healthy range. No ads over your data.

BMI tells you a number. Caliper tells you what it means.

Enter your height, weight, age, and sex — and in seconds you see your BMI on a calm color-zoned arc, an estimate of your body fat percentage, your waist-to-height ratio, your full healthy weight range, and the exact target: "Lose 12 lbs to reach a healthy BMI." Then Caliper tracks the journey so the number becomes progress, not a verdict.

WHY BMI ALONE ISN'T ENOUGH A single ratio can mislabel athletes as overweight and miss where you actually store fat. Caliper adds the context that turns a scary number into an honest read — body-fat estimate, waist-to-height ratio, a healthy range for your height, and a country benchmark that shows where you stand among people like you.

WHAT YOU GET FREE • The Health Arc — your BMI on a color-zoned gauge, needle animated to your position • Your exact target: "You are 12 lbs above a healthy BMI" • Healthy weight range for your height • Body-fat estimate (Deurenberg formula; U.S. Navy method if you add waist and neck) • Waist-to-height ratio with a plain-language verdict • Country benchmark: "leaner than X% of women aged 30–34 in the US" • 30-day weight and BMI trend • Milestone celebrations when you cross into a healthier zone • Progress sharing card — always free

CALIPER PRO • Full weight and BMI history beyond 30 days • Body-fat and waist-ratio trend lines • Projected date to reach your target at your current rate • BMR and TDEE metabolic context • "vs the world" global benchmark percentile • PDF and CSV export • No ads anywhere

Caliper Pro (optional upgrade) • Monthly - $2.99/month (auto-renewable) • Annual - $14.99/year (auto-renewable) • Lifetime - $24.99 one-time purchase

Payment is charged to your Apple Account at confirmation. Auto-renewable subscriptions renew automatically at the same price unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://docs.google.com/document/d/1-mW5cCsNjs9x-AgN1O5aAvbBZY65r-ZNp_2_4kynplQ

Caliper provides informational estimates and does not offer medical advice or diagnosis.

PRIVACY FIRST Everything stays on your phone. No account required, no data ever leaves your device, no ads over the field where you type your weight.