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CALCULATORS

Everyday calculations

Calculate percentages, dates, age, BMI, tips, and common comparisons.

5 specialized tools100% local processing

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Begin with the primary workflow

Open the recommended tool, or compare the grouped alternatives below.

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FEATURED CALCULATORS

Percentage Calculator

calculate a percentage of a value, percentage change, or what percent one value is of another.

Local browser processing
Automatic recalculation after valid changes
Unit-aware constrained fields

Calculators4 options

Tip Calculatorcalculate a tip and per-person total from bill amount, rate, and party size.

BMI Calculatorcalculate adult body mass index from metric height and weight with standard category labels.

Age Calculatorcalculate completed years, months, and days between a birth date and comparison date.

Date Difference Calculatorcalculate signed calendar days and absolute elapsed time between two ISO dates.