All tools
HealthCalcLab tools
Browse simple calculators for calories, hydration, fitness, sleep, steps, and general wellness estimates.
BMI Calculator
Estimate body mass index from height and weight.
Calorie Calculator
Estimate daily calories based on activity and goals.
Water Intake Calculator
Estimate daily water intake from body weight.
Protein Intake Calculator
Estimate daily protein needs by goal and weight.
Macro Calculator
Estimate protein, carbs, and fat targets.
Body Fat Estimate Calculator
Estimate body fat percentage using common body measurements.
Ideal Weight Calculator
View a simple healthy-weight range estimate.
Weight Loss Timeline Calculator
Estimate how long a weight loss goal may take.
Maintenance Calorie Calculator
Estimate daily maintenance calories.
Calorie Deficit Calculator
Estimate calorie targets for gradual weight loss.
Walking Calories Calculator
Estimate calories burned while walking.
Running Calories Calculator
Estimate calories burned while running.
Steps to Calories Calculator
Estimate calories burned from step count.
Steps to Miles Calculator
Convert steps into approximate miles.
Pace Calculator
Calculate pace from distance and time.
Heart Rate Zone Calculator
Estimate training heart-rate zones.
Sleep Time Calculator
Plan sleep and wake times around full cycles.
Fasting Timer
Simple fasting window timer and planner.
Meal Calorie Split Calculator
Split daily calories across meals.
Post-Workout Hydration Calculator
Estimate rehydration needs after exercise.
Pregnancy Due Date Calculator
Estimate a due date from last menstrual period.
Period Date Calculator
Estimate your next period date from cycle length.
Health Age Calculator
Calculate age in years, months, and days.
Waist-to-Height Ratio Calculator
Calculate waist-to-height ratio as a simple risk-screening number.
BMR Calculator
Estimate basal metabolic rate.
TDEE Calculator
Estimate total daily energy expenditure.
One Rep Max Calculator
Estimate your one-rep max from reps and weight.
Workout Calories Calculator
Estimate calories burned during common workouts.
BMI Chart
Reference BMI categories and ranges.
Healthy Weight Range Calculator
Estimate a BMI-based weight range for your height.