Free Online Calculators & Date Tools

Accurate, free tools for everyday calculations

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Age Calculator

Popular

Calculate your exact age in years, months, days, and hours from your date of birth.

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BMI Calculator

Health

Find your Body Mass Index (BMI) using your height and weight. Supports metric and imperial units.

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Days Until Birthday

Fun

Count down the days until your next birthday with a visual progress tracker.

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Week Number Calculator

Utility

Find out what week number any date falls in, with full month and year navigation.

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Why Use Our Online Calculators?

Our free online calculators are designed for accuracy, speed, and privacy. All calculations happen directly in your browser — no data is ever sent to a server. Whether you need to calculate your exact age, check your BMI, count days until your next birthday, or find the week number for any date, our tools deliver instant, precise results.