Categories
Pick a category
Each category has every common unit and every pairwise conversion. Click a popular conversion to jump straight to the calculator, or open the category page for the full list.
Celsius, Fahrenheit, Kelvin.
LengthMillimeters, centimeters, meters, kilometers, inches, feet, yards, miles.
WeightGrams, kilograms, ounces, pounds, stones, tons.
VolumeMilliliters, liters, cups, gallons, fluid ounces, tablespoons, teaspoons.
CookingCups, tablespoons, teaspoons to grams or ounces. Per-ingredient density math for flour, sugar, butter, honey, and 25+ more.
TimeSeconds, minutes, hours, days, weeks, years.
SpeedMiles per hour, kilometers per hour, meters per second, knots.
AreaSquare meters, square feet, acres, hectares, square miles.
DataBytes, kilobytes, megabytes, gigabytes, terabytes, petabytes.
FrequencyHertz, kilohertz, megahertz, gigahertz, terahertz, RPM, BPM.
EnergyJoules, kilojoules, calories, kilocalories, kilowatt-hours, BTU.
PressurePascals, kilopascals, bar, atmospheres, psi, mmHg, inHg.
AngleDegrees, radians, gradians, arcminutes, arcseconds, turns.
Fuel EconomyMiles per gallon (US/UK), liters per 100 km, kilometers per liter.
Why ConsultCalc
Most online conversion sites are slow, crowded with popups, or buried under three pages of SEO copy before the actual calculator. ConsultCalc is the opposite: open a page, see the calculator at the top, get the answer. Every page works on mobile, every page loads in under a second, and every conversion is exact.
We also include a reference table of common values on every page (1, 5, 10, 25, 50, 100 of the from-unit), the conversion formula, and quick links to related conversions in the same category. Useful when you want more than just one number — for example, scaling a recipe or translating a temperature range.
Conversion factors are based on the SI definitions (1 inch = 0.0254 m exactly, 1 pound = 0.45359237 kg exactly) and verified against NIST reference tables. Spot an error? Email hello@consultcalc.com.