Online Tools / Health & Fitness

Health & Fitness

Free health and fitness calculators for BMI, calories, BMR, body fat, healthy weight, running pace and pregnancy dates.

BMI Calculator

Calculate body mass index from height and weight, with an adult BMI category and healthy-weight reference range.

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Calorie Calculator

Estimate daily calorie needs from age, sex, height, weight and activity level, with maintenance and goal-based estimates.

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BMR Calculator

Calculate basal metabolic rate (BMR) and compare resting energy needs with an activity-adjusted daily estimate.

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Body Fat Calculator

Estimate body fat percentage from height, weight and circumference measurements, with estimated fat and lean mass.

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Due Date Calculator

Estimate an expected pregnancy due date from the last menstrual period or an estimated conception date.

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Pregnancy Calculator

Estimate an expected due date, conception date and pregnancy timeline from common pregnancy-dating inputs.

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Ideal Weight Calculator

Compare traditional ideal-weight formulas with the healthy adult BMI weight range for your height.

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Pregnancy Conception Calculator

Estimate an approximate conception date and possible conception window from a due date or last menstrual period.

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Pace Calculator

Calculate running, walking or cycling pace, speed, time or distance using kilometers or miles.

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Health & Fitness

Health and fitness calculators for everyday planning

Tervilo Health & Fitness tools help you estimate common body and fitness metrics such as BMI, calorie needs, BMR, body composition, exercise pace and related date calculations. Enter your measurements and assumptions to get a quick mathematical estimate.

These calculators are intended for general information and planning, not diagnosis or individualized medical advice. Results can depend on age, sex, activity level, measurement method and other assumptions. For health decisions, discuss relevant results with a qualified professional.

Health & Fitness guides

Explore practical explanations of BMI, calories, BMR, exercise calculations and the assumptions behind common health metrics.

Pace Calculator Guide: How It Works, How to Use It and Important Limitations Learn how to calculate pace, time and distance in minutes per kilometre or mile, with worked examples and practical limitations. Pregnancy Conception Calculator Guide: How It Works, How to Use It and Important Limitations Understand how conception calculators estimate probable conception timing and fertile windows, including cycle variation and limitations. Ideal Weight Calculator Guide: How It Works, How to Use It and Important Limitations Compare traditional ideal-weight formulas, understand BMI-based reference ranges, and avoid treating one number as a universal target. Pregnancy Calculator Guide: How It Works, How to Use It and Important Limitations Understand how a pregnancy calculator builds a calendar timeline, what dating inputs mean, and why the dates are estimates. Due Date Calculator Guide: How It Works, How to Use It and Important Limitations Calculate and understand an estimated pregnancy due date from the relevant starting date, including dating assumptions and why the date can change. Body Fat Calculator Guide: How It Works, How to Use It and Important Limitations Learn how circumference-based body-fat estimation works, how measurements affect the result, and why body-fat calculations are approximate. BMR Calculator Guide: How It Works, How to Use It and Important Limitations Learn how BMR is estimated, compare common equations, understand BMR vs TDEE, and interpret the result responsibly. Calorie Calculator Guide: BMR, Activity and Daily Energy Needs Learn how calorie calculators estimate daily energy needs from BMR, activity and other assumptions, with practical examples and limitations. BMI Calculator Guide: Formula, Categories and Limitations Learn the BMI formula, adult screening categories, metric and imperial calculations, worked examples and important limitations.

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