Set calorie and macro targets
Estimate maintenance or deficit calories plus macro splits for your current phase.
Fitness & Health
Fitness & Health calculators
Plan workouts, fueling, and rest days with science-backed formulas and clear safety disclaimers.
BMI, BMR, TDEE, VO2, macrosMetric + imperial inputsClear wellness disclaimers
Perfect for
- •Runners and endurance athletes
- •Lifters, trainers, and gym owners
- •Anyone tracking healthy habits
Try these first
What you can solve
Common scenarios
Non-medical fitness tools for BMI, BMR, TDEE, pace, VO2, macro splits, and hydration planning.
Dial in training pace or zones
Convert finish goals into per-mile or per-kilometer pacing data.
Estimate hydration or recovery windows
Plan daily water intake or rest intervals using proven guidelines.
Pick a tool
Featured fitness & health calculators
Browse the live tools below or request a new calculator if you need something specific.
fitness
BMI Calculator
Calculate body mass index (BMI) to gauge weight relative to height.
Open calculator →fitness
BMR Calculator
Estimate basal metabolic rate (BMR) using the Mifflin-St Jeor equation.
Open calculator →fitness
TDEE Calculator
Estimate total daily energy expenditure (TDEE) based on BMR and activity level.
Open calculator →fitness
Heart Rate Zone Calculator
Estimate maximum heart rate and key training zones using age and resting heart rate.
Open calculator →fitness
Running Pace Calculator
Track pace for training plans using distance and time.
Open calculator →fitness
One-Rep Max Calculator
Estimate 1RM strength using the Epley formula.
Open calculator →fitness
Stride Length Calculator
Estimate walking/running stride length from height, cadence, and goal pace.
Open calculator →fitness
Daily Water Intake Calculator
Estimate how much water to drink based on weight, activity, and climate.
Open calculator →fitness
Macro Calculator
Convert daily calories into protein, carb, and fat gram targets.
Open calculator →fitness
VO2 Max Calculator
Estimate VO2 max using Cooper test distance (12-minute run) or similar field test.
Open calculator →fitness
Calorie Deficit Time Calculator
Estimate time to reach a weight-loss goal using a daily calorie deficit.
Open calculator →fitness
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
Non-medical fitness tools for BMI, BMR, TDEE, pace, VO2, macro splits, and hydration planning.
Evidence-based equations
We rely on widely accepted formulas like Mifflin-St Jeor, Katch-McArdle, or Daniels where applicable.
Flexible units & activity presets
Enter pounds or kilograms, minutes or miles, and pick activity multipliers that match your routine.
Built-in reminders
Each calculator reinforces that the estimates are informational so you can consult a coach or clinician as needed.
Explore related categories
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 complement, 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 what you track.
- Where do the formulas come from?
- We cite widely used sports-science or nutrition equations inside each calculator so you know exactly how the number was generated.