Health Tools — Free Online Utilities
Health and fitness calculators for BMI, calories, hydration, and sleep cycles, based on well-established formulas. These are informational aids, not medical advice.
Estimate your body fat percentage using the US Navy formula with a visual gauge and category.
Calculate your TDEE, BMR, and daily macro targets for any fitness goal.
Calculate calories burned for 50+ activities based on your weight and exercise duration.
Ishihara-inspired color vision screening with 8 plates — for educational use only.
Convert cooking measurements: cups, tablespoons, ml, oz, grams, and more.
Calculate your ideal body weight using four medical formulas.
Estimate your life expectancy based on lifestyle
Build a custom FDA-style nutrition facts label by adding ingredients with full nutrient data.
Calculate your ideal bedtime or wake-up time based on 90-minute sleep cycles.
Calculate your personalized daily water intake recommendation with an hourly reminder schedule.
HIIT and circuit training timer with custom rounds, work/rest intervals, audio cues, and localStorage workout plans.