Converters
Units, colors, bases, data formats and currency.
Converters turn a value in one unit or format into its equivalent in another. This category spans everyday measurements like length, temperature, and weight, plus specialist charts for clothing, ring, and bra sizes, kitchen conversions such as cups to grams and oven temperatures, and data formats like CSV to JSON and Markdown to HTML. Cooks, makers, students, shoppers, and developers use them whenever a recipe, pattern, spec, or file assumes different units than the ones they have.
Unit ConverterConvert any common unit.Currency ConverterLive rates for 30+ currencies.Length ConverterMetric and imperial length.Temperature ConverterCelsius, Fahrenheit, Kelvin.Weight ConverterKg, lb, oz and more.Color ConverterHEX, RGB and HSL.Base ConverterBinary, hex, decimal, octal.Roman Numeral ConverterNumbers to Roman numerals.Number to WordsSpell out any number.Clothing Size ConverterUS, UK, EU sizes by country.Ring Size ConverterUS, UK, EU, Japan & mm.Bra Size Calculator & ConverterMeasure your size, or convert US, UK, EU, FR, AU.Drill Bit Size ConverterFraction, metric, letter, number.Knitting & Crochet SizesNeedle & hook: US, UK, mm.Cups to Grams ConverterBy ingredient — flour, sugar, etc.Oven Temperature Converter°F, °C, gas mark & fan.Cake Pan Size ConverterSwap round, square & rectangular tins.Yeast ConverterActive dry, instant & fresh yeast.Paper Size ConverterA4, Letter, B & C series.Kids Clothing Size ConverterBaby & kids US, UK, EU.Thread Size ConverterTex, denier, Nm, ticket.Bead Size ConverterSeed bead aught to mm.
Frequently asked questions
- Are the converters free, and is there a sign-up?
- Every converter here is free and needs no account or sign-up. You can convert as many values as you want, with no usage limits. That applies to the plain unit converters and the specialist size charts alike.
- Do I need to install an app to use them?
- No app is required. The converters run in a normal web browser on desktop or mobile, so there is nothing to download or install. Enter a value, choose the units, and read the result.
- Are these converters private and safe to use?
- Most of the converters run in your browser, which means the values you type are handled on your own device rather than uploaded somewhere. The conversions rely on standard formulas and published reference charts. For sizing especially, brands differ, so it is worth treating the result as a close guide rather than a guarantee.
- Which converter should I use for a recipe or a sewing pattern?
- For cooking, Cups to Grams handles ingredient weights, the Oven Temperature Converter switches between Fahrenheit, Celsius, and gas marks, and the Cake Pan Size Converter adjusts for a different tin. For sewing and craft, there are converters for thread, bead, drill bit, and knitting and crochet sizes. For general measurements, start with the Unit Converter or the more specific Length, Weight, or Temperature converters.