How accurate is the BMI calculator?

It uses the standard BMI formula (weight ÷ height²). BMI is a useful estimate for many adults, but it doesn’t capture body composition.

What affects daily calorie needs?

Calorie needs vary by age, sex, height, weight, activity level, and goals (maintain, lose, or gain weight).

Is the pregnancy calculator for medical use?

It provides estimates based on the dates you enter. For medical decisions, confirm with a healthcare professional.

Should I consult a doctor?

Yes for medical concerns. These tools are for informational estimates and planning, not diagnosis.

Is my health data private?

Yes. Calculations run in your browser and your inputs aren’t stored on our servers.

Can I use these tools on mobile?

Yes. All health tools are responsive and work on phones, tablets, and desktops.

Do these calculators work for children?

Some formulas are designed for adults. If you’re calculating for children, use age-appropriate guidance and consult a professional when needed.

Why do different calorie calculators show different results?

Different calculators may use different equations (like Mifflin-St Jeor vs Harris-Benedict) and activity multipliers, which changes the estimate.

Stay Healthy - 7 Tools

Health & Fitness Tools

Health and fitness calculators for quick estimates: BMI, calorie needs, pregnancy timing, age, and more. Designed for fast checks and planning — calculations run in your browser and don’t require an account.

Free Age Calculator – Find Your Exact Age in Seconds

Enter your birthdate and get your exact age broken down to years, months, weeks, days, hours, and minutes — instantly and for free.

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Free BMI Calculator – Check Your Body Mass Index Online

Enter your height and weight to calculate your Body Mass Index (BMI) and find out which health category you fall into — metric or imperial units supported.

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Calorie Calculator – Daily Caloric Needs by Age, Weight & Activity

Find out exactly how many calories you need each day based on your body stats and activity level — for weight loss, maintenance, or muscle gain.

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Date Difference Calculator – Find Days Between Any Two Dates

Calculate the precise difference between two dates in days, weeks, months, and years — great for deadlines, anniversaries, project durations, and age checks.

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Free Percentage Calculator – Find %, Increase & Decrease

Solve any percentage problem in seconds — find a percentage of a number, calculate percentage change, or discover what percent one value is of another.

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Pregnancy Calculator – Due Date, Trimester & Week Tracker

Find your estimated due date, how many weeks pregnant you are, your current trimester, and upcoming pregnancy milestones — based on your last menstrual period.

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Time Calculator – Add, Subtract & Convert Time Durations Free

Add or subtract any combination of hours, minutes, and seconds, calculate time between two clock values, and convert between 12-hour and 24-hour formats.

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Frequently Asked Questions

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