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Tools for a healthier you

Free health calculators that work beautifully on every screen.

Autivae helps you estimate BMI, daily calories, hydration, ideal weight, BMR and body fat with fast, privacy-friendly tools built for everyday wellness planning.

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Popular Health Tools

Start with the calculator that matches your goal. Each tool includes plain-language guidance and a reminder that results are informational only.

Weight

BMI Calculator

Check your body mass index from height and weight.

Calculate BMI
Nutrition

Calorie Calculator

Estimate daily calories using age, sex, size and activity.

Estimate calories
Hydration

Water Intake Calculator

Find a simple daily water estimate based on body weight and exercise.

Calculate water needs
Weight

Ideal Weight Calculator

Use a common adult formula to estimate a healthy reference weight.

Estimate ideal weight
Metabolism

BMR Calculator

Estimate resting energy needs with the Mifflin-St Jeor equation.

Calculate BMR
Fitness

Body Fat Calculator

Estimate body fat percentage from tape measurements.

Estimate body fat
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Health Tips

What BMI Means

Learn when BMI is useful, where it falls short and how to read your result wisely.

Read guide

Daily Calories

Understand maintenance calories, gentle deficits and why activity level matters.

Read guide

Daily Water Intake

Review practical hydration habits for busy days, workouts and warm weather.

Read guide