Set calorie and macro goals
Estimate maintenance, surplus, or deficit calories, then split them into macros for your current phase.
Fitness & Health
Fitness & Health calculators
Use common training formulas to plan workouts, fueling, and rest days, then check with a coach or clinician when needed.
BMI, BMR, TDEE, VO2, and macrosMetric and imperial inputsNon-medical guidance reminders
Perfect for
- •Runners and endurance athletes
- •Lifters, trainers, and gym owners
- •Anyone building healthier habits
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What you can solve
Common scenarios
General fitness calculators for BMI, BMR, TDEE, pace, VO2, macro splits, and hydration planning.
Set training pace or zones
Convert finish goals into per-mile or per-kilometer pace targets.
Estimate hydration and recovery windows
Plan daily water intake and rest intervals using common guidelines.
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Featured fitness & health calculators
Browse the live tools below or request a new calculator if you need something specific.
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BMI Calculator
Calculate body mass index (BMI) to gauge weight relative to height.
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BMR Calculator
Estimate basal metabolic rate (BMR) using the Mifflin-St Jeor equation.
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TDEE Calculator
Estimate total daily energy expenditure (TDEE) based on BMR and activity level.
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Heart Rate Zone Calculator
Estimate maximum heart rate and key training zones using age and resting heart rate.
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Running Pace Calculator
Track pace for training plans using distance and time.
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One-Rep Max Calculator
Estimate 1RM strength using the Epley formula.
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Stride Length Calculator
Estimate walking/running stride length from height, cadence, and goal pace.
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Daily Water Intake Calculator
Estimate how much water to drink based on weight, activity, and climate.
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Macro Calculator
Convert daily calories into protein, carb, and fat gram targets.
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VO2 Max Calculator
Estimate VO2 max using Cooper test distance (12-minute run) or similar field test.
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Calorie Deficit Time Calculator
Estimate time to reach a weight-loss goal using a daily calorie deficit.
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Cholesterol Ratio Calculator
Calculate total cholesterol plus key ratios (TC/HDL, LDL/HDL, TG/HDL) and fill in the missing value when possible.
Open calculator →Why people trust us
Built for real-world decisions
General fitness calculators for BMI, BMR, TDEE, pace, VO2, macro splits, and hydration planning.
Widely used equations
These calculators use common formulas like Mifflin-St Jeor, Katch-McArdle, and Daniels where applicable.
Flexible units and activity presets
Enter pounds or kilograms, minutes or miles, and choose activity multipliers that match your routine.
Built-in reminders
Each calculator notes that results are informational estimates, so you can consult a coach or clinician as needed.
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Hop to another topic to keep your project or plan moving.
FAQs
- Is this medical advice?
- No. These tools provide general fitness estimates and should support, not replace, guidance from a licensed professional.
- Can I input kilograms, centimeters, or miles?
- Yes. Most calculators support both metric and imperial units so you can stick with the format you already track.
- Where do the formulas come from?
- Each calculator cites the sports-science or nutrition equation it uses, so you can see exactly how the result was calculated.