Calculators
Quick finance, health, and unit calculations in your browser.
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BMI Calculator
Calculate Body Mass Index with metric or imperial units.
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TDEE Calculator
Find your Total Daily Energy Expenditure and daily calorie targets.
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Loan Calculator
Monthly payments and full amortization schedule for home or car loans.
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Tip Calculator
Calculate tip and split the bill among any number of people.
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Age Calculator
Find your exact age in years, months, and days plus your next birthday countdown.
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Date Difference
Calculate the exact number of days, weeks, months, or years between two dates.
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Percentage Calculator
Calculate percentages, find X% of Y, or compute percentage change.
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Length Converter
Convert between mm, cm, m, km, inches, feet, yards, and miles.
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Weight Converter
Convert between grams, kilograms, ounces, pounds, stones, and metric tons.
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Timezone Converter
Convert time across multiple timezones simultaneously.
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Why use browser-based calculators?
Every calculator on this page runs entirely inside your browser using standard JavaScript — no data is ever sent to a server. That means your health stats, financial numbers, and personal dates stay completely private. The calculations are instant, work offline once the page has loaded, and are accessible on any device.