FREE FITNESS TOOLS
7 free calculators to help you and your clients make data-driven decisions. No sign-up required.
Whether you're a personal trainer calculating macros for clients or tracking your own fitness journey, these free calculators help you make data-driven decisions. Each tool uses scientifically validated formulas — no account required.
Calorie & Macro Calculator
Calculate daily calories, protein, fat, and carbs based on your goals.
Calculate
1RM Calculator
Estimate your one-rep max from submaximal lifts.
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BMI Calculator
Calculate Body Mass Index and see where you stand.
Calculate
Water Intake Calculator
Find your optimal daily water intake.
Calculate
Ideal Weight Calculator
Calculate your ideal weight using 4 scientific formulas.
Calculate
Body Fat (Skinfold)
Estimate body fat with the Jackson-Pollock 3-point method.
Calculate
Body Fat (Navy)
Calculate body fat using the U.S. Navy circumference method.
Calculate
Track all these metrics for your clients automatically
Stop doing manual calculations. Megin tracks body measurements, calories, and progress automatically — so you can focus on coaching.