Your Ultimate Conversion Hub

Convert between degrees, radians, and gradians for geometry and engineering.

Convert between modern area units like square meters, square feet, acres, and hectares, as well as a rich variety of historical and specialized land measurements from around the globe.

Convert between bits, bytes, kilobytes, megabytes, gigabytes, terabytes, and more.

Convert between common energy units like joules, calories, kilowatt-hours, and BTUs. It also supports specialized and historical units such as electronvolts, therms, barrels of oil equivalent, atomic units of energy, Thermie, Ton of Refrigeration, Foot-poundal, Tonne of Coal Equivalent, Kilopond-meter, and Cubic Foot of Natural Gas.

Convert between a vast array of measurement units including metric, imperial, historical, and specialized units of length from around the globe.

Convert numbers between a wide array of numeral systems, including standard decimal, binary, octal, and hexadecimal, as well as less common and historical bases like ternary, duodecimal, vigesimal (Mayan), sexagesimal (Babylonian number system converter), Roman Numerals, Base 36, and Base 64.

Convert between a comprehensive range of pressure units, including PSI, kilopascals, atmospheres, and bar. It also supports specialized and historical units such as Torr, millimeters of mercury, inches of water, technical atmospheres, pounds per square foot, Megapascals, Hectopascals, and Microbars. Perfect for engineering, meteorology, medical, and scientific applications.

Convert between a vast array of speed units, from common miles per hour, kilometers per hour, meters per second, and knots, to fascinating historical, obscure, and specialized measurements like furlongs per fortnight, Mach, leagues per hour, light-years per year, micrometers per second, and Roman paces per minute. Perfect for travel, engineering, scientific, and even geological applications.

Instantly convert temperatures between Celsius, Fahrenheit, Kelvin, and a wide array of historical scales like Rankine, Delisle, Newton, Réaumur, Rømer, and Leiden.

Convert between seconds, minutes, hours, days, historical calendar periods, and high-precision scientific time units.

Convert between Newton-meters, pound-force-feet, and a fascinating array of historical and specialized torque units for diverse applications.

Convert between liters, gallons, cubic meters, fluid ounces, and a wide array of historical and ancient volume units.

Convert between a vast array of weight and mass units, including modern, historical, and ancient measurements from across the globe.

Convert cooking and baking measurements across a vast range of units: from common volume (cups, ml, tsp, tbsp, oz) and weight (grams, ounces, pounds) to oven temperatures (Celsius, Fahrenheit, Kelvin), plus fascinating historical and specialized units like gills, drams, stone, troy ounces, Réaumur, and Rankine. Perfect for any recipe, anywhere in the world, across time!

Get real-time exchange rates for global currencies using ExchangeRate-API.

Track daily spot prices and conversions for precious and industrial metals powered by MetalCharts.

Convert between universal adult sizes, head circumferences, wrist and neck measurements, lens dimensions, waist and hip circumferences, fluid absorbency capacities, draping proportions, and international sizing equivalents for balaclavas, bracelets, earmuffs, eyewear, gaiters, incontinence products, and scarves.

Convert between infant, toddler, and youth sizes, age brackets, height standards, and international measurement equivalents for balaclavas, bodysuits, diapers and nappies, dresses, earmuffs, gloves and mittens, hats and beanies, onesies and infant creepers, outerwear and snowsuits, pants and leggings, rompers and overalls, scarves, shoes, shoe widths and fittings, skirts, sleepwear, socks and tights, suits, swimwear, underwear and training pants, upper-body apparel, and neck/winter gaiters.

Convert between men’s international sizes, waist girths, nominal widths, post gauge thicknesses, carat weight equivalents, hoop inner diameters, hand palm dimensions, head circumferences, chest widths, shoulder breadths, sleeve lengths, inseam lengths, inner finger circumferences, foot lengths, forefoot width fittings, neck collars, and sizing equivalents for belts, condoms, earrings, gloves, hats, outerwear, pants, rings, shoes, shoe widths, sleepwear, socks, suits, swimwear, underwear, and upper-body shirts and sweaters.

Convert between women’s international sizes, waist and hip girths, ribcage band and bust cup differentials, height-to-weight hosiery matrices, denier stretch grading, body contouring dimensions, foot lengths, ball width fittings, heel elevations, absorption droplet scales, Syngina test fluid gram capacities, inner finger diameters, post gauges, drop lengths, hand palm measurements, head circumferences, torso drops, and sizing equivalents for belts, bras, dresses, earrings, gloves, hats, hosiery and tights, outerwear, pants, rings, rompers, sanitary pads, shoes, shoe widths, skirts, sleepwear, socks, suits, swimwear, tampons, underwear, and upper-body blouses and sweaters.