Unit Converter
Convert between 100+ units across 11 categories — length, weight, temperature, area, volume, speed, time, digital storage, energy, pressure, and angle. Instant results with formula explanations and full conversion tables.
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Conversion Tools Tools
Browse every conversion tools tool in one place. Compare workflows, open individual calculators and utilities, and keep your internal linking consistent across the category.
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All Conversion Tools Tools
5 totalLength Converter
Convert length and distance between 20 units — mm, cm, m, km, inches, feet, yards, miles, nautical miles, fathoms, light-years, astronomical units, and more. Instant results with formula, conversion factor, and full reference table.
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Weight Converter
Convert weight and mass between 17 units — micrograms, milligrams, grams, kilograms, metric tonnes, ounces, pounds, stones, short tons, long tons, carats, troy ounces, and more. Instant results with formula and full reference table.
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Temperature Converter
Convert temperature between 8 scales — Celsius, Fahrenheit, Kelvin, Rankine, Réaumur, Rømer, Newton, and Delisle. Exact algebraic formulas, live results, and a full reference table for every scale.
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Volume Converter
Convert volume between 22 units — millilitres, litres, cubic metres, US teaspoons, tablespoons, cups, pints, quarts, gallons, UK pints, UK gallons, cubic inches, cubic feet, and more. Instant results with formula and full reference table.
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Popular Across QuickTools
View homepage picks →JSON Formatter
Format, validate, minify, or sort JSON data with configurable indentation. Instantly check for syntax errors, view node count and nesting depth — free, no sign-up required.
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QR Code Generator
Generate QR codes for URLs, text, Wi-Fi credentials, vCards, and more. Customise foreground and background colour, error correction level, margin, and download as SVG or PNG — free and instant.
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BMI Calculator
Calculate your Body Mass Index, healthy weight range and ideal weight using metric or imperial units.
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Calorie Calculator
Estimate daily calorie needs based on age, gender, height, weight and activity level using Mifflin-St Jeor, Harris-Benedict or Katch-McArdle formulas.
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