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Math Calculators
Percentage, fractions, GPA, dates, grades — clean calculators that show the formula.
13 calculators — all free, formula included
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Percentage Calculator
6 percentage modes: % of, % change, what %, add/subtract % and more.
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Fraction Calculator
Add, subtract, multiply, divide fractions — auto-simplified with mixed number output.
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Square Root Calculator
√ square root, ∛ cube root, and n² squared — with perfect square detection.
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GPA Calculator
Weighted GPA on a 4.0 scale — add courses, credit hours and letter grades.
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Age Calculator
Exact age in years, months, days — plus total days lived and next birthday countdown.
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Date Calculator
Days, weeks, months, years between any two dates. Includes working days.
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Final Grade Calculator
What score do you need on your final exam to hit your target course grade?
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Discount Calculator
Sale price from % off, or find what discount was applied. Quick % buttons.
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Word Counter
Count words, characters, sentences, paragraphs and reading time for any text.
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Password Generator
Cryptographically random passwords — choose length, character types, one-click copy.
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Scientific Calculator
Trig, log, ln, powers, roots, π, e — full keyboard support
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Recipe Converter
Scale any recipe up or down — all ingredient amounts update instantly
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Cups to Grams Converter
Convert cooking measurements for 18 common baking ingredients