Fast health, fitness, calorie, and hydration calculators.

HealthCalcLab helps you estimate common wellness numbers like BMI, daily calories, water intake, protein targets, walking calories, and weight-loss timelines. Simple tools, clear results, no account required.

Popular tools

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.

Built for simple estimates, not medical advice

Use these calculators as starting points for planning and learning. Results are estimates based on common formulas and may not apply to every person or health situation.