Precision calculators for serious results.
Clean, premium, high-accuracy tools for performance, learning, finance and daily life.
Nutrition calculators
Core tools for metabolism, body composition and hydration.
BMR & TDEE
Estimate resting metabolism and total daily energy expenditure.
BMI Calculator
Check body mass index and weight category.
Daily Calorie Intake
Find calorie targets for fat loss or muscle gain.
Macro Calculator
Split calories into protein, carbs and fat.
Body Fat % (US Navy)
Estimate body fat from simple tape measurements.
Water Intake
Calculate daily hydration needs.
Running calculators
Tools for pace, VO₂, splits and race planning.
Pace Calculator
Convert distance and time to pace.
Race Pace
Predict 5k, 10k, 21k and 42k paces.
Speed ↔ Pace
Convert between km/h, mph and min/km.
VO₂max (Cooper)
Estimate VO₂max from 12-minute test.
VO₂max (Rockport)
Estimate VO₂max from 1-mile walk.
Running Calories
Estimate calories burned from speed and time.
Cadence ↔ Speed
Convert cadence to running speed.
Split Calculator
Generate km/mile splits for training.
Strength calculators
Load, volume, intensity and progress tracking.
1RM Estimator
Epley & Brzycki formulas.
RPE ↔ %1RM
Convert RPE to training load.
Training Volume
Sets × reps × weight.
Weekly Muscle Volume
Track volume per muscle group.
Progressive Overload
Generate weekly load progression.
Strength Standards
Compare lifts to strength norms.
Rest Timer
Simple interval timer.
Barbell Plate Calculator
Exact plate loading for any weight.
Finance calculators
Fast, clean essentials for financial math.
Unit converters
Universal, fast conversions for daily use.
School utilities
Fast helpers for math, writing and homework.
Baby growth tools
Simple, non-diagnostic educational tools.