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Unit Conversion Calculators

Length, area, volume, force, energy, density, number scales, and everyday unit converters

Acreage Calculator

Calculate acreage from a rectangular plot measured in feet, with square feet, hectares, and square meters.

Density Conversion

Convert density among kg/m³, g/cm³, lb/ft³, and lb/US gal.

Energy Conversion Calculator

Convert energy among joules, kilojoules, calories, kilocalories, Wh, kWh, BTU, and eV.

Feet and Inches Calculator

Combine feet and inches into total inches, centimeters, and meters, or split total inches into feet and inches.

Force Converter

Convert force between newtons, kilonewtons, pound-force, kilogram-force, and dynes.

Length Converter

Convert common length and distance units.

MPG to L/100km Converter

Convert US miles per gallon to liters per 100 kilometers and back.

Pixels to Inches Converter

Convert pixels to physical inches and centimeters using image resolution in DPI.

Power Converter

Convert power among watts, kilowatts, megawatts, mechanical horsepower, and BTU/hour.

Temperature Converter

Convert Celsius, Fahrenheit, and Kelvin.

Acre to Are Conversion

Convert acres to ares and ares to acres using exact square-meter definitions.

Acres to Square Miles Calculator

Convert acres to square miles or square miles to acres using the exact 640 acres per square mile relationship.

Angle Conversion Calculator

Convert angles among degrees, radians, gradians, turns, arcminutes, and arcseconds.

Area Converter

Convert square area units.

Ares to Cent Converter

Convert ares to cents and cents to ares for Indian land measurement.

Ares to Hectares Converter

Convert ares to hectares and hectares to ares with the exact metric relationship.

Astronomical Unit Calculator

Convert astronomical units to kilometers, miles, and light-minutes, or convert any supported unit back to AU.

Billion to Trillion Converter

Convert billions to trillions and trillions to billions using the US short scale.

CCF to Gallons Conversion

Convert CCF (hundred cubic feet) and US gallons in either direction.

CCF to Therms Calculator

Convert natural-gas volume in CCF to estimated therms and back.

Cents to Dollars Calculator

Convert US cents to dollars or dollars to cents.

Cents to Euros Calculator

Convert euro cents to euros or euros to euro cents.

CGS System of Units Converter

Convert selected length, mass, force, and energy quantities between SI and CGS units.

Conversion Calculator

Use a practical hub for common length, mass, and Celsius/Fahrenheit conversions.

CPS Calculator

Convert cycles per second (CPS) among hertz, kilohertz, and RPM.

Crore to Lakh Converter

Convert crore to lakh and lakh to crore in the Indian numbering system.

Crore to Million Converter

Convert crore in the Indian system to million in the Western system and back.

Cubic Feet Calculator

Calculate cubic feet, liters, and cubic meters from dimensions in feet.

Cubic Meter Calculator

Calculate cubic meters, liters, and cubic feet from dimensions in meters.

Cubic Yards to Tons Calculator

Estimate tons and pounds from cubic yards and material density.

Data Storage Converter

Convert bytes, kilobytes, megabytes, and more.

dBm to Watts Calculator

Convert logarithmic power in dBm to watts or milliwatts and convert watts back to dBm.

Decagram to Gram Converter

Convert decagrams (dag) and grams (g) in either direction.

Decimeter to Meter Converter

Convert decimeters to meters and meters to decimeters instantly.

Dimensional Analysis Calculator

Apply a multiplication factor and an optional division factor to a numeric value.

Dimes to Dollars Calculator

Convert US dimes to dollars or dollars to dimes.

Drops to mL Conversion

Convert drops and milliliters using a selected or custom drops-per-mL factor.

Feet to Inches Calculator

Convert feet to inches or inches to feet using the exact 12-to-1 relationship.

Gallon Calculator

Convert a US volume from gallons, liters, quarts, pints, or cups and show all equivalents.

Gallons to Pounds Converter

Convert US gallons to pounds using the selected liquid density.

Grams to Ounces Calculator

Convert grams and avoirdupois ounces accurately in either direction.

Hardness Conversion Calculator

Estimate conversions among Rockwell B, Rockwell C, Brinell, and Vickers hardness scales.

Height in Inches Calculator

Convert a height in feet and inches to total inches, centimeters, and meters.

Inch-Pounds to Foot-Pounds Converter

Convert torque between inch-pounds and foot-pounds using 12 inches per foot.

Inch-Pounds to Newton-Meters Converter

Convert torque between inch-pounds and newton-meters in either direction.

Inches to Fraction Calculator

Convert decimal inches to the nearest common fraction up to 1/64 inch and see the millimeter equivalent.

Joules to Volts Calculator

Calculate volts from energy in joules and electric charge in coulombs.

Kilograms to Gallons Converter

Convert liquid kilograms to US gallons using density in kilograms per liter.

Knots to KPH Converter

Convert knots to kilometers per hour or kilometers per hour to knots.

Knots to MPH Converter

Convert knots to miles per hour or miles per hour to knots.

Leet Speak Translator

Encode plain text into basic leet speak or decode common leet substitutions.

Light Year Conversion

Convert light-years to kilometers, miles, and astronomical units, or convert those distance units to light-years.

Liters to Centiliters Converter

Convert liters (L) and centiliters (cL) in either direction.

Lowercase to Uppercase Converter

Convert entered text to uppercase.

m/s to km/h Converter

Convert meters per second to kilometers per hour and back.

Mesh to Micron Converter

Estimate sieve opening in microns from mesh number, or estimate mesh from microns.

mg to mL Calculator

Calculate dose volume from milligrams and concentration, or milligrams from milliliters.

Micrograms to Milligrams Converter

Convert micrograms (mcg or µg) and milligrams (mg) in either direction.

Million to Billion Converter

Convert millions to billions and billions to millions using the short scale.

Million to Lakh Converter

Convert million to lakh and lakh to million.

Million to Thousand Converter

Convert millions to thousands and thousands to millions.

mL to Cups Converter

Convert milliliters and US cups using 236.5882365 mL per cup.

Natural Gas Converter

Estimate natural-gas energy equivalents among therms, CCF, BTU, kWh, and MJ.

Newton-Meter Torque Calculator

Convert torque among newton-meters, foot-pounds, inch-pounds, and kilogram-force meters.

Newton-Meters to Foot-Pounds Converter

Convert torque between newton-meters and foot-pounds.

Newton-Meters to Inch-Pounds Converter

Convert newton-meter torque to inch-pounds and inch-pounds to newton-meters.

Nickels to Dollars Calculator

Convert US nickels to dollars or dollars to nickels.

Number to Billion Converter

Express a full number as billions and show the remaining millions.

Number to Million Converter

Convert a full numeric value into millions.

N·m to Joules Calculator

Convert numerical magnitudes between newton-meters and joules.

Ounces to Cups Converter

Convert US fluid ounces and US cups in either direction.

Paper Quantity Converter

Convert paper quantities among sheets, quires, reams, and bundles.

Pennies to Dollars Calculator

Convert US pennies to dollars or dollars to pennies.

Pint to Pound Conversion

Convert US liquid pints to pounds using water or a custom liquid density.

Pounds and Ounces Calculator

Combine pounds and ounces or split total ounces into pounds and ounces.

Pounds-Force to Newtons Converter

Convert pound-force to newtons and newtons to pound-force.

PPM Calculator

Calculate parts per million from an amount and a total measured on the same basis.

PPM to mg/L Converter

Convert ppm to mg/L or mg/L to ppm using the dilute-water approximation.

Pressure Converter

Convert pressure units such as bar and psi.

PSI to GPM Orifice Flow Calculator

Estimate water flow in gallons per minute from orifice diameter and pressure drop.

PX to EM Converter

Convert CSS pixels to em units or em units to pixels using a chosen base font size.

Quantity Converter

Convert counts among pieces, dozens, scores, gross, and great gross.

Quarters to Dollars Calculator

Convert US quarters to dollars or dollars to quarters.

Quarts to Pounds Conversion

Convert US liquid quarts to pounds using liquid density.

Radiation Converter

Convert absorbed dose between gray and rad or equivalent dose between sievert and rem.

RMS to Watts Converter

Estimate resistive-load audio power from RMS voltage and resistance.

Speed Converter

Convert speed and velocity units.

Square Kilometers to Acres Conversion

Convert square kilometers to acres and acres to square kilometers accurately.

Square Yards to Acres Calculator

Convert square yards to acres or acres to square yards using 4,840 square yards per acre.

Torque to Horsepower Calculator

Calculate mechanical horsepower from torque and engine speed.

Torr to Atmospheres Converter

Convert pressure between torr and standard atmospheres.

Uppercase to Lowercase Converter

Convert entered text to lowercase.

Volume Converter

Convert liquid and volume units.

Weight Converter

Convert kilograms, pounds, ounces, and more.

Weird Units Converter

Make novelty conversions among banana lengths, football fields, elephant masses, meters, and kilograms.