All unit converters at a glance
Convert length, weight, temperature, area, volume, speed, data and currency instantly. Free unit converters with conversion tables and formulas.
- Length Converter: Convert length and distance units instantly: meters, feet, inches, centimeters, miles, kilometers and more, with exact factors and feet-and-inches support.
- Weight Converter: Convert weight and mass units: kilograms, pounds, ounces, grams, stones, tons, troy ounces, carats and tola, with exact factors and pounds-and-ounces display.
- Temperature Converter: Convert temperatures between Celsius, Fahrenheit, Kelvin and Rankine with the exact formula shown for every answer. Includes oven, body and weather values.
- Area Converter: Convert area units: square feet, square meters, acres, hectares and square miles, plus marla and kanal with a choice of regional marla definitions. Free.
- Volume Converter: Convert volume and capacity units: liters, milliliters, US and imperial gallons, pints, cups, fluid ounces, cubic meters, cubic feet and oil barrels.
- Speed Converter: Convert speed units instantly: kilometers per hour, miles per hour, meters per second, feet per second, knots, Mach and the speed of light. Exact and free.
- Time Converter: Convert time units: milliseconds, seconds, minutes, hours, days, weeks, months and years, with a days-hours-minutes-seconds breakdown. Free and instant.
- Data Storage Converter: Convert digital storage units: bits, bytes, KB, MB, GB and TB plus binary KiB, MiB, GiB and TiB. See why a 1 TB drive shows about 931 GB in Windows.
- Pressure Converter: Convert pressure units: psi, bar, kPa, pascals, atmospheres, mmHg, inHg, torr and kgf/cm². Handy for tires, weather, diving, blood pressure and engineering.
- Energy Converter: Convert energy units: joules, kilojoules, calories, kilocalories, watt-hours, kWh, BTU, therms, foot-pounds and electronvolts, using exact factors. Free.
- Cooking Converter: Convert cups, tablespoons and teaspoons to grams, ounces and milliliters for flour, sugar, butter, rice, milk and 20 more ingredients. Free and instant.
- Currency Converter: Convert currencies with daily-updated exchange rates: dollar, euro, pound, rupee, dirham, riyal and more. Searchable currency list, swap and popular pairs.
- Number to Words Converter: Convert numbers to English words in the international (million, billion) or South Asian (lakh, crore) system, with cheque-style amounts in dollars or rupees.
- Roman Numeral Converter: Convert numbers to Roman numerals and back with strict validation, a step-by-step breakdown and a date converter for tattoos and anniversaries. 1 to 3,999.
- Time Zone Converter: Convert a time between world time zones with automatic daylight saving, save your own list of cities, and find meeting times that suit everyone. Free.
Every tool on ToolsWorld is free, needs no account and works on phones, tablets and computers.