Calculator Category
Math & Conversions Calculators
Everyday math and unit-conversion tools — from a quick percentage or fraction to a full scientific calculation. These are the calculators you reach for again and again, built to be fast and keyboard-friendly.
Common uses
- Work out percentages, ratios, and fractions without the mental math
- Convert between units — length, weight, volume, temperature, area, and more
- Run scientific calculations with trigonometry, logarithms, and constants
- Keep a running tape of your basic calculations as you go
Calculators
Basic Calculator
Arithmetic with an editable tape: search, tags and notes, a total, print and export.
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RPN Calculator
Reverse Polish Notation calculator with replay, precision controls, and memory registers.
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Percentage Calculator
Calculate X% of Y, percent change, add or subtract a percentage, and reverse percentages.
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Unit Converter
ConverterConvert units across length, weight, time, temperature, and more.
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Fraction Calculator
Convert fractions to decimals and simplify fractions.
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Ratio Calculator
Simplify, scale, solve and compare ratios, mix quantities, and split a total.
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Scientific Calculator
Advanced calculator with scientific functions, trigonometry, and logarithms.
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