Instant Free Tools Math
Math and grades
Find a percentage, a discount or a percent change, average a list of numbers, or simplify a ratio. Students can work out a weighted class grade, the score they need on the final, and their GPA on a 4.0 scale.
- Percentage calculatorPercent of a number, percent change, and what percent one number is of another.
- Grade calculatorWeighted class grade as a percent and letter, and the score you need on the final.
- GPA calculatorUnweighted and weighted GPA on a 4.0 scale, with Honors and AP classes and cumulative GPA.
- Average calculatorMean, median, mode, sum, range and standard deviation of a list, plus weighted averages.
- Ratio calculatorSimplify a ratio, find the missing number in a proportion, or split an amount by a ratio.
- Fraction to decimalFractions, mixed numbers and decimals both ways, with repeating decimals.
Which tool to use
Discounts, a tip as a percent and percent change are all in the percentage calculator. A plain average of scores or prices is the average calculator. For a class, the grade calculator weights homework, tests and the final and finds the score you still need, while the GPA calculator turns letter grades and credits into a 4.0 GPA. Scaling a recipe or a screen size is the ratio calculator, and a fraction from a ruler or a recipe becomes a decimal with fraction to decimal.