Converters Calculators
Length, weight, temperature, color, file size, Roman numerals, and unit conversions.
15 tools
- Angle Converter Convert between degrees, radians, and gradians.
- Binary Calculator Binary arithmetic and conversions.
- Color Contrast Calculator (WCAG) Contrast ratio between two hex colors and WCAG AA/AAA pass.
- Conversion Calculator Length, weight, and temperature conversions.
- Currency Calculator Convert between currencies using a configurable exchange rate (offline-friendly).
- File Size Converter Convert between B, KB, MB, GB (decimal and binary).
- Height Calculator Predict a child’s adult height from age, weight, and parents’ heights (Khamis–Roche), or use parents-only mid-parental height. Includes a height unit converter.
- Hex Calculator Hexadecimal arithmetic and conversions.
- Hex ↔ RGB ↔ HSL Converter Convert color values between hex, RGB, and HSL.
- Right Triangle Calculator Sides and angles of a right triangle.
- Roman Numeral Converter Arabic ↔ Roman numerals.
- Scientific Notation Calculator To/from scientific notation.
- Shoe Size Conversion Approximate US / EU / UK shoe conversion.
- Triangle Calculator Solve triangle from sides/angles (SSS/SAS/ASA helpers).
- Weight Calculator Convert kg ↔ lb.