Health numbers,
made clear.
Calculate body, calorie, nutrition, fitness, and recovery estimates—then see what the result means, how it was calculated, and where its limits are.
All calculators
Start with the question
you want answered.
Every tool shows its method, assumptions, and related calculators so you can keep exploring without losing context.
Body & Composition
Understand your body
BMI Calculator
Estimate your body mass index and understand the screening category it falls into.
Body Fat Calculator
Estimate body fat using tape or skinfold methods and see the assumptions behind each equation.
Waist-to-Hip Ratio Calculator
Calculate waist-to-hip ratio and review general body-fat distribution guidance.
Lean Body Mass Calculator
Estimate lean body mass and fat mass from height, weight, and the Boer equation.
Ideal Weight Calculator
Review a formula-based reference weight and a broader range for context.
Calories & Nutrition
Plan your energy
BMR Calculator
Estimate the calories your body uses at rest with the Mifflin–St Jeor equation.
Resting Energy Calculator
Estimate resting energy expenditure without turning it into a prescriptive diet target.
TDEE Calculator
Estimate total daily energy expenditure from resting energy and activity level.
Macro Split Calculator
Turn a daily calorie target into a transparent protein, carbohydrate, and fat split.
Water Intake Calculator
Estimate a daily hydration range using weight, activity, and climate assumptions.
Fitness & Recovery
Train and recover
Coach Business
Plan your business
Personal Training Package Pricing Calculator
Calculate a sustainable session and package price based on your income goals, expenses, discounts, and expected session volume.
Personal Trainer Earnings Calculator
Estimate trainer earnings and business margin using completed, cancelled, and unattended sessions.
Individual vs Group Training Profit Calculator
Compare individual and group sessions by revenue, profit, utilization, and trainer-hour efficiency.
Personal Trainer and Studio Capacity Calculator
Estimate how many sessions and active clients your coaching business can support.
Fitness Studio No-Show Cost Calculator
Estimate how much revenue your business loses through late cancellations and unattended sessions.
Personal Trainer and Fitness Studio Break-Even Calculator
Calculate how many sessions, clients, or packages you need each month to cover your business expenses.
Built for trust
See the method,
not just the number.
Health estimates need context. Each calculator explains what it measures, where the formula comes from, and when the result may not apply.
Read our methodologyReady for the next step?
Turn useful numbers into consistent coaching.
Coach Track helps trainers organize clients, sessions, and progress. Your calculator inputs are never transferred automatically.
Explore Coach Track