Calculators & Converters

Percentage, GPA, time zone, area, ratio and unit tools.

• Percentage Calculator

  Find percentages, percentage of a number and percent difference.

• GPA Calculator

  Calculate semester and cumulative GPA from grades and credits.

• Time Zone Converter

  Convert time between cities and time zones.

• Area Calculator

  Calculate the area of common shapes with unit conversion.

• Ratio Calculator

  Simplify ratios and solve for a missing value.

• GCF & LCM Calculator

  Find the greatest common factor and least common multiple.

• Temperature Converter

  Convert between Celsius, Fahrenheit and Kelvin.

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