Math & Numbers
General-purpose math, percentage, and number-conversion calculators.
Tools
Decimal to Fraction Calculator
Free decimal to fraction calculator with simplification steps shown. Convert decimals to simplified fractions, mixed numbers, or reverse fractions to decimals.
Percentage Decrease Calculator
Calculate percentage decrease between two values, find the price after a percent off, or work back to the original price. Free, with the formula shown.
Percentage Difference Calculator
Find the percentage difference between two numbers instantly. See the formula worked out step by step, plus how it compares to percentage change.
Percentage Increase Calculator
Free percentage increase calculator and percentage change calculator. Enter two values to get percent change, absolute change, and direction instantly.
Racine Carrée Calculator
Calculate the square root of any non-negative number instantly. This racine carrée calculator shows exact or rounded results, adjustable precision, and the working behind every answer.
Guides
How to Calculate Percentage Increase (Formula, Examples & Common Uses)
Learn how to calculate percentage increase with the formula, step-by-step examples, and real-world uses, plus try our free percentage increase calculator.
How to Convert a Decimal to a Fraction (Step-by-Step with Examples)
Learn how to convert decimal to fraction step by step, including simplifying and repeating decimals, plus try our free decimal to fraction calculator.