Health & Fitness Calculators
Free health and fitness calculators for body composition, hydration, calories, training, and fitness metrics.
Health & Fitness Calculators
Water Intake Calculator
Hydration
Personalized daily water target based on weight, activity, and climate. Includes a suggested drinking schedule.
Body Fat Percentage Calculator
Body Composition
US Navy or BMI method. Includes lean body mass, fat mass, ACE category, and goal weight calculation.
Calories Burned Walking Calculator
Cardio
Time, distance, or step-count modes. Uses 2024 Compendium MET values with incline and load support.
Steps to Calories Calculator
Cardio
Convert steps to calories with reverse mode for calorie targets. Includes running and stair climbing.
ABV Calculator
Brewing
Calculate ABV from gravity readings (Standard or Hall formula) plus standard drinks calculator and ABV reference chart.
One Rep Max Calculator
Strength Training
Five formulas averaged. Percentage chart, plate loading, and strength standards for the Big Three.
Running Pace Calculator
Running
Four modes including race time predictor. Pace charts for 5K, 10K, half, and full marathon.