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

Calculator Directory

• Basic Calculator - Perform arithmetic calculations with tape history, search, pinning, and print-ready notes.
• RPN Calculator - Reverse Polish Notation calculator with replay, precision controls, and named memory profiles.
• Percentage Calculator - Calculate percentages easily.
• Unit Converter - Convert units across length, weight, time, temperature, and more.
• Fraction Calculator - Convert fractions to decimals and simplify fractions.
• Ratio Calculator - Calculate mixing ratios and mechanical ratios (pulleys/gears).
• Scientific Calculator - Advanced calculator with scientific functions, trigonometry, and logarithms.

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