Free Unit Converter: cm to Inches, kg to lbs, °C to °F

Is a 30 cm ruler about 12 inches? How many pounds is 70 kilos? What is 20 degrees Celsius in Fahrenheit? Quick conversions come up in shopping, cooking, travel, fitness and school. The PDFFlowState Unit Converter is a free tool that handles length, weight, temperature, volume and more, in your browser, with no account.

Open the Unit Converter

What does the Unit Converter do?

Unit Converter converts between units of length, weight, temperature, volume and more. It covers the searches people make every day: centimeters to inches, inches to cm, kg to lbs, lbs to kg, mm to inches, feet to cm, Celsius to Fahrenheit, kilometers to miles, grams to ounces and gallons to liters.

How to convert units

  1. Open the tool. Go to Unit Converter. It works on phone and desktop.
  2. Choose the type. Pick length, weight, temperature or volume.
  3. Enter your number and choose the units to convert from and to.
  4. Read the result.

No sign-up is needed, so it is a free converter for everyday use.

Quick conversion reference

Length

From To Value
1 inch centimeters 2.54 cm
1 inch millimeters 25.4 mm
1 foot centimeters 30.48 cm
1 centimeter inches 0.3937 in
1 millimeter inches 0.0394 in
1 meter feet 3.2808 ft
1 mile kilometers 1.6093 km
1 kilometer miles 0.6214 mi

Weight

From To Value
1 kilogram pounds 2.2046 lb
1 pound kilograms 0.4536 kg
1 pound ounces 16 oz
1 ounce grams 28.35 g

Volume

From To Value
1 US gallon liters 3.785 L
1 UK gallon liters 4.546 L
1 US fluid ounce milliliters 29.57 mL

Temperature

  • Celsius to Fahrenheit: multiply by 9/5, then add 32.
  • Fahrenheit to Celsius: subtract 32, then multiply by 5/9.
  • Handy points: 0 °C = 32 °F, 20 °C = 68 °F, 37 °C = 98.6 °F, 100 °C = 212 °F.

Common examples

  • 30 cm is about 11.81 inches.
  • 5 ft 6 in is 167.64 cm.
  • 70 kg is about 154.3 lb.
  • 150 lb is about 68.04 kg.
  • 10 km is about 6.21 miles.
  • 16 °C is 60.8 °F.

Tips

  • Check the unit system. US and UK gallons and ounces are different.
  • Weight is not volume. Converting ounces to milliliters only works directly for water-like liquids, where 1 mL weighs about 1 g. Use fluid ounces for liquids.
  • Round sensibly. Two decimals is enough for most everyday uses.
  • Working with CSS? Use PX to REM Converter for pixels and REM.
  • Need a percentage? Try Percentage Calculator.

Frequently asked questions

Is the unit converter free? Yes. It is free and needs no sign-up.

Which units can I convert? Length, weight, temperature, volume and more.

How many cm are in an inch? Exactly 2.54 cm.

How many pounds are in a kilogram? About 2.2046 pounds.

Can it convert power, pressure, electrical units or data sizes? The tool covers length, weight, temperature, volume and more. If you need a specific unit, try it in the tool to see whether it is included.

Can it convert cooking measurements such as grams to cups? Grams to cups depends on the ingredient, so there is no single answer.

Convert your units now

Try the free Unit Converter or browse all the everyday converters on PDFFlowState.