🧮 10+ Free Tools

Every calculator you need — in one place.

From LCM and GCD to GPA and percentage change — fast, accurate, and beautifully designed tools with step-by-step explanations and visual diagrams.

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Find the Least Common Multiple of any set of numbers with step-by-step working and prime factorization.

Find the Greatest Common Divisor using prime factorization or the Euclidean algorithm.

Solve any percent problem — X% of Y, X is what % of Y, and reverse calculations.

Find the percent change between two values with a visual bar diagram.

Simplify any ratio to its lowest terms with a visual before-and-after diagram.

Find the exact or approximate square root of any number with a visual square diagram.

Find your exact age in years, months, days, hours, and seconds — with a life timeline.

Calculate your semester GPA and cumulative CGPA across multiple grading scales.

Convert numbers between binary, octal, decimal, and hexadecimal with a visual bit diagram.

We're always adding new calculators. Tell us which tool you'd like to see next — we love building what our users actually need.