Free Health & Fitness Calculators — BMI, Calories, BMR & More

Which Health Calculator Do You Need?

Different health, fitness, fertility, and pregnancy questions require different calculations. Use the guide below to choose the calculator that best matches what you want to estimate.

Weight, Fitness & Nutrition Calculators

Health and fitness calculations often work together. BMI can provide a general weight-to-height screening measure, while BMR and TDEE can help estimate energy needs. Calorie, protein, and macro calculations can then be used to explore different nutrition scenarios.

Weight and Body Composition

The BMI Calculator estimates Body Mass Index from height and weight. The Body Fat Calculator provides an estimate of body fat percentage using the measurements supported by the calculator.

The Ideal Weight Calculator provides a reference estimate based on the selected formula. It should not be treated as a universal target because healthy body composition varies between individuals.

Calories and Energy Needs

The BMR Calculator estimates resting energy needs. The TDEE Calculator builds on that estimate by considering activity.

The Calorie Calculator can then help estimate daily calorie needs for a selected goal. For weight-loss planning, the Calorie Deficit Calculator can be used to explore a calorie-deficit scenario.

Protein and Macronutrients

Protein needs vary according to factors such as body size, activity, age, and fitness goals. The Protein Intake Calculator and Protein Calculator provide estimates based on the inputs supported by each tool.

For a broader nutrition breakdown, the Macro Calculator estimates protein, carbohydrates, and fat targets.

Hydration

The Water Intake Calculator provides a general hydration estimate. Actual fluid requirements can vary with temperature, exercise, diet, illness, pregnancy, medications, and other factors.

Pregnancy & Fertility Calculators

EverydayCalcPro also provides calculators for common pregnancy and fertility estimates. These tools use the information entered by the user to provide approximate results and are not a substitute for medical care.

Pregnancy Due Date

The Pregnancy Due Date Calculator estimates a likely due date from pregnancy dating information. A due date is an estimate, and the actual date of delivery can occur earlier or later.

Ovulation and Fertile Window

The Ovulation Calculator estimates an expected ovulation date and fertile window from menstrual-cycle information.

Menstrual cycles can vary from month to month. Calendar-based estimates therefore cannot confirm the exact day of ovulation or guarantee whether pregnancy will or will not occur.

Pregnancy Weight Gain

The Pregnancy Weight Gain Calculator estimates a recommended pregnancy weight-gain range using the information supported by the calculator.

Pregnancy weight recommendations can depend on individual circumstances. A healthcare professional can provide guidance that takes personal medical and pregnancy factors into account.

How Health Calculator Results Are Estimated

Most health calculators use mathematical equations or reference ranges to turn basic information into an estimate. The inputs and formulas vary by calculator.

• BMI: Uses height and weight to calculate Body Mass Index.
• BMR: Estimates resting energy requirements from personal characteristics such as age, height, weight, and sex.
• TDEE: Estimates daily energy expenditure by incorporating activity into resting energy needs.
• Body fat: Estimates body fat percentage using the measurements supported by the selected method.
• Nutrition: Estimates calorie, protein, water, or macronutrient requirements from the entered information and goal.
• Pregnancy: Uses pregnancy or menstrual-cycle information to provide estimated dates, windows, or weight-gain ranges.

Results should be treated as estimates. Individual health, fitness, fertility, and pregnancy needs can differ from mathematical calculations.

Before Using a Health Calculator

For a more useful result, enter accurate information and make sure the units match the values being entered.

• Check your height and weight before starting.
• Confirm whether the calculator uses metric or imperial units.
• Enter your age and other personal information accurately.
• Select the activity level that best represents your usual activity rather than an unusually active or inactive day.
• For menstrual-cycle calculations, use the most accurate cycle information available.
• For pregnancy calculations, check that the dates and pregnancy information are entered correctly.

Health, Fitness & Pregnancy Guides

Calculator results are easier to understand when you know what the numbers mean. Browse the EverydayCalcPro Blog for health, fitness, nutrition, fertility, pregnancy, and calculator guides.

Health Calculator Disclaimer

EverydayCalcPro health, fitness, fertility, and pregnancy calculators provide mathematical estimates based on the information entered by the user.

These results are intended for general information, education, planning, and comparison. They are not a diagnosis and should not be considered medical advice.

Health and pregnancy needs can vary considerably between individuals. For medical concerns, pregnancy care, fertility questions, significant dietary changes, or other health decisions, consult an appropriately qualified healthcare professional.