Screen your numbers
Estimate BMI, ideal weight, and calorie needs with clearly stated assumptions.
Health & fitness calculators
Health & Fitness Calculators for Weight, Body, Calories, and Pacing
Estimate body metrics, daily calorie needs, due dates, and pacing with transparent screening tools that state their methods and limits.
Built for people tracking weight or fitness, runners, expectant parents, and health-conscious planners. Inputs stay local unless a tool clearly says otherwise.
Decision support
Use these tools before money changes hands
Plan a goal
Set a weight, pace, or study target and check what inputs drive the result.
Understand the limits
Health screening tools are general estimates, not diagnoses.
Tool cluster
Recommended tools
Featured
BMI Calculator
Calculate BMI quickly and privately in your browser.
Featured
Calorie Calculator
Estimate daily calories and macros from simple inputs.
Featured
Ideal Weight Calculator
Estimate your ideal body weight using seven common formulas (Hamwi, Devine, Robinson, Miller, Broca, Lorentz, Peterson) plus a healthy BMI range.
Featured
Pace Calculator
Calculate your running pace per km or mile from distance and time, plus speed and predicted race times.
Useful
Pregnancy Calculator
Estimate your pregnancy due date and current week from your last period, conception date, or a known due date. Private, no account.
Useful
GPA Calculator
Calculate your GPA on a standard 4.0 scale from course letter grades and credits. Local, private, no upload.
Useful
Percentage Calculator
Calculate percentages, increases, and changes instantly.
Trust model
Useful pages, not thin pages
These collections group existing tools around real decisions. The calculators keep assumptions visible, link to related tools, state important limitations, and point toward quality evidence so you can verify inputs before relying on a result.
FAQ
Common questions
Are these health tools a diagnosis?
No. They are general screening and planning estimates with stated methods and limitations. Consult a qualified professional for health advice.
How accurate are BMI and calorie estimates?
They use standard formulas and published defaults. Individual factors like body composition, activity, and medical conditions can change results.
Which calculator is right for me?
Pick the metric you want to estimate — BMI, calories, ideal weight, pace, or due date — and use the related links to compare.