Unit Converters Calculators & Tools
Length, Weight, Temperature, Speed, Volume, and Digital Storage converters.
Converting between units should be fast and trustworthy. These converters handle length, weight, temperature, speed, volume, and more, giving you the result instantly along with the conversion factor used.
Acceleration Converter
Convert between acceleration units. Get quick, accurate results with this free online converter, including formulas and worked examples.
Angle Converter
Convert between degrees, radians, gradians, and turns.
Area Converter
Convert between square meters, acres, hectares, square feet, etc.
Aspect Ratio Calculator
Calculate and convert display aspect ratios.
Clothing Size Converter
Convert between US, UK, and EU clothing sizes.
Cm to Inches Converter
Convert centimeters to inches (cm to in) instantly. 1 cm = 0.3937008 inches.
Cm to Meters Converter
Convert centimeters to meters (cm to m) instantly. 1 cm = 0.01 meters.
Cm to Mm Converter
Convert centimeters to millimeters (cm to mm) instantly. 1 cm = 10 mm.
Color Converter
Convert between HEX, RGB, and HSL color formats.
Cooking Measurement Converter
Convert between cups, tablespoons, teaspoons, mL, and oz.
Data Storage Converter
Convert between bytes, KB, MB, GB, TB, and PB.
Density Converter
Convert between density units.
Energy Converter
Convert between joules, calories, kWh, BTU, and eV.
Flow Rate Converter
Convert between flow rate units.
Force Converter
Convert between newtons, pounds-force, dynes, and kgf.
Frequency Converter
Convert between Hz, kHz, MHz, GHz, and rpm.
Feet to Inches Converter
Convert feet to inches (ft to in) instantly. 1 foot = 12 inches.
Feet to Meters Converter
Convert feet to meters (ft to m) instantly. 1 foot = 0.3048 meters.
Fuel Efficiency Converter
Convert between mpg, km/L, and L/100km.
Illuminance Converter
Convert between lux, foot-candles, and phot.
Inches to Cm Converter
Convert inches to centimeters (in to cm) instantly. 1 inch = 2.54 cm.
Inches to Feet Converter
Convert inches to feet (in to ft) instantly. 12 inches = 1 foot.
Inches to Mm Converter
Convert inches to millimeters (in to mm) instantly. 1 inch = 25.4 mm.
Km to Meters Converter
Convert kilometers to meters (km to m) instantly. 1 km = 1000 meters.
Km to Miles Converter
Convert kilometers to miles (km to mi) instantly. 1 km = 0.6213712 miles.
Length Converter: Convert mm, cm, m, km, in, ft
Convert between meters, feet, inches, centimeters, kilometers, miles, yards, and other units of length instantly.
Meters to Cm Converter
Convert meters to centimeters (m to cm) instantly. 1 meter = 100 cm.
Meters to Feet Converter
Convert meters to feet (m to ft) instantly. 1 meter = 3.2808399 feet.
Meters to Km Converter
Convert meters to kilometers (m to km) instantly. 1000 meters = 1 km.
Meters to Yards Converter
Convert meters to yards (m to yd) instantly. 1 meter = 1.0936133 yards.
Miles to Km Converter
Convert miles to kilometers (mi to km) instantly. 1 mile = 1.609344 km.
Mm to Cm Converter
Convert millimeters to centimeters (mm to cm) instantly. 10 mm = 1 cm.
Mm to Inches Converter
Convert millimeters to inches (mm to in) instantly. 1 mm = 0.0393701 inches.
Number to Words Converter
Convert numbers to English words.
Power Converter
Convert between watts, horsepower, BTU/h, and kW.
Pressure Converter
Convert between Pa, atm, psi, bar, mmHg, and torr.
Roman to Arabic Converter
Convert Roman numerals to Arabic numbers.
Shoe Size Converter
Convert between US, UK, and EU shoe sizes.
Speed Converter
Convert between m/s, km/h, mph, knots, and ft/s.
Temperature Converter - Celsius, Fahrenheit, Kelvin
temperature converter. Convert between Celsius, Fahrenheit, and Kelvin instantly with formulas and step-by-step explanations.
Time Converter
Convert between seconds, minutes, hours, days, weeks, months, years.
Timezone Converter
Convert time between UTC offsets.
Torque Converter
Convert between Newton-meters, foot-pounds, and more.
Volume Converter
Convert between liters, gallons, cups, fluid ounces, etc.
Weight Converter - Convert Between Mass Units
weight converter. Convert between kilograms, pounds, ounces, grams, stones, and more mass units instantly.
Yards to Meters Converter
Convert yards to meters (yd to m) instantly. 1 yard = 0.9144 meters.
How to choose the right Unit Converters tool
- Pick the category that matches what you are measuring, then enter any value.
- Temperature conversions are not simple multiplication, so use the dedicated temperature tool.
- For cooking or travel, the everyday converters handle the common cases.
- The conversion factor is shown so you can sanity-check the math.
Who these tools are for
For students, travelers, cooks, and professionals who need an accurate conversion without second-guessing it.
Need Help Solving a Problem?
Our AI Math Solver handles any math problem, just type it in plain English and get instant step-by-step solutions.
Explore Other Categories
Popular tools from our other scientific categories
Absolute Value Calculator
Calculate the absolute value of any number. Use this free calculator for fast, accurate answers, complete with the formula and a worked example.
AC to DC Converter Calculator
Convert AC voltage to DC voltage for different rectifier configurations. Free online calculator with instant, step-by-step results.
Acid-Base Titration Calculator
Calculate concentration from titration data. Get quick, accurate results with this free online calculator, including formulas and worked examples.
ABV Calculator
Calculate alcohol by volume from original and final gravity. Free calculator with instant calculations, the underlying formula, and an easy-to-follow example.
Amortization Schedule Calculator - Free Online
Free Generate a complete amortization schedule. Step-by-step solutions and formulas included. Free, accurate results with step-by-step explanations.
Average Cost Basis Calculator - Free Online
Free Calculate average cost per share. Step-by-step solutions and formulas included. Fast, accurate, and free, with formula and example.
1031 Exchange Calculator - Free Online
Free Calculate tax deferral in a 1031 exchange. Step-by-step solutions and formulas included. Fast, accurate, and free, with formula and example.
A1C Calculator - Free Online
Free Convert between A1C percentage and estimated average glucose. Step-by-step solutions and formulas included. Simple, fast, and free.
Batting Average Calculator
Calculate batting average in baseball/cricket. Free calculator with instant calculations, the underlying formula, and an easy-to-follow example.
Air Density Calculator
Calculate air density from temperature and pressure using the ideal gas law. Fast, accurate, and free, with formula and example.
Age Calculator
Calculate exact age in years, months, and days. Use this free calculator for fast, accurate answers, complete with the formula and a worked example.
Circle Area Calculator
Calculate the area and circumference of a circle. Free online calculator with instant results, step-by-step explanations, and a clear worked example.
Angle Between Two Lines Calculator
Calculate the angle between two lines given their slopes. Free calculator with instant calculations, the underlying formula, and an easy-to-follow example.
Apache Log Parser, Free Online Developer Tool
Parse Apache/NGINX combined access log lines into IP, time, request, status and size fields. Get instant results, the formula, and a clear example.
Add Text to Beginning, Free Online Text Tool
Add custom text to the beginning of every line in your text instantly. Get instant results, the formula, and a clear example.
Accessible Color Pair Finder
Check if a text/background pair meets WCAG and suggest a fix. Free tool with instant calculations, the underlying formula, and an easy-to-follow example.