Free Online Calculators

Calculate dates, percentages, time zones, and unit conversions with focused browser tools.

Age Calculator

Enter a date of birth to calculate exact age in years, months, and days. Check age on any date and see total days, weeks, or months with no login required.

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PC Calculator

Percentage Calculator

Calculate a percentage of a number, find what percent one value is of another, and work out percentage increase, decrease, change, or reverse values instantly.

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TZ Calculator

Time Zone Converter

Convert a date and time between common time zones and see the selected UTC offsets. The tool also flags day changes and daylight-saving times that are invalid or ambiguous.

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UC Calculator

Unit Converter

Convert metric and imperial length, weight, temperature, and US volume units online. See the formula and equivalent values instantly without registration.

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LC Calculator

Length Converter

Convert meters, feet, inches, centimeters, kilometers, miles, and more. See the formula and equivalent values for dimensions, heights, and distances with no login.

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