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Unit Converter

Free unit converters for length, weight, temperature, volume, time, and cooking measurements. Pick the one you need.

What is a Unit Converter?

A unit converter translates a measurement from one unit to another using a fixed conversion factor. The two most common measurement systems are metric (meters, kilograms, Celsius) used by most of the world, and imperial (feet, pounds, Fahrenheit) used primarily in the United States.

Whether you're converting recipe measurements, checking luggage weight limits, or translating international weather forecasts, a unit converter gives you an accurate result instantly — no manual math required.

How to Convert Units

  1. 1
    Identify the units. Determine which unit you're converting from and which you're converting to (e.g., centimeters to inches).
  2. 2
    Find the conversion factor. Look up the factor for that unit pair. For example: 1 cm = 0.3937 in, 1 kg = 2.2046 lbs, 1 mile = 1.6093 km.
  3. 3
    Multiply. Multiply your value by the conversion factor. For example, 10 cm × 0.3937 = 3.937 inches.
  4. 4
    Verify. Check that the result makes sense — a larger unit should give a smaller number and vice versa.

All Unit Converters

CM to Inches Converter

Convert centimeters to inches and back. 1 cm = 0.3937 inches. Perfect for height, screen sizes, and clothing measurements.

  • Length
  • cm ↔ inches
  • 1 cm = 0.3937 in

KG to LBS Converter

Convert kilograms to pounds and back. 1 kg = 2.2046 lbs. Ideal for body weight, luggage limits, and shipping.

  • Weight
  • kg ↔ lbs
  • 1 kg = 2.2046 lbs

Fahrenheit to Celsius Converter

Convert Fahrenheit to Celsius using the standard formula (°F - 32) × 5/9. Works for weather, cooking, and science.

  • Temperature
  • °F ↔ °C
  • (°F - 32) × 5/9

Miles to KM Converter

Convert miles to kilometers and back. 1 mile = 1.6093 km. Useful for road trips, running distances, and travel.

  • Distance
  • mi ↔ km
  • 1 mi = 1.6093 km

Feet to Meters Converter

Convert feet to meters and back. 1 foot = 0.3048 meters. Great for construction, real estate, and height.

  • Length
  • ft ↔ m
  • 1 ft = 0.3048 m

Cups to ML Converter

Convert US cups to milliliters. 1 US cup = 236.59 mL. Essential for following international recipes.

  • Volume
  • cups ↔ mL
  • 1 cup = 236.59 mL

Hours to Minutes Converter

Convert hours (including decimals) to minutes. 1 hour = 60 minutes. Handy for timesheets, payroll, and scheduling.

  • Time
  • hrs ↔ min
  • Decimal hours

Cooking Converter

Convert between cups, tablespoons, teaspoons, milliliters, fluid ounces, pints, quarts, and gallons. All kitchen measurements in one tool.

  • Kitchen
  • 8 unit types
  • US & metric

Binary to Decimal Converter

Convert binary numbers to decimal and hexadecimal, or decimal to binary. Step-by-step positional math breakdown.

  • Number systems
  • Bin ↔ Dec ↔ Hex
  • Step-by-step

Hex to RGB Converter

Convert hex color codes to RGB values and vice versa. Shows HSL output and a live color preview swatch.

  • Color codes
  • Hex ↔ RGB + HSL
  • Color preview

Which Unit Converter Should I Use?

Length & height: Use CM to Inches for smaller measurements (height, screen sizes, clothing) or Feet to Meters for larger measurements (room dimensions, construction).

Distance & travel: Use Miles to KM for road trips, running distances, and international travel.

Weight: Use KG to LBS for body weight, luggage, shipping, and gym weights.

Temperature: Use Fahrenheit to Celsius for weather, cooking temperatures, and science.

Cooking & recipes: Use Cups to ML for a quick volume conversion or the Cooking Converter for a full kitchen measurement tool (cups, tbsp, tsp, oz, pints, quarts, gallons).

Time: Use Hours to Minutes for timesheets, payroll calculations, and scheduling with decimal hours.

Common Conversion Factors

Conversion Factor Type
1 cm → inches 0.3937 Length
1 inch → cm 2.54 Length
1 foot → meters 0.3048 Length
1 meter → feet 3.2808 Length
1 mile → km 1.6093 Distance
1 km → miles 0.6214 Distance
1 kg → lbs 2.2046 Weight
1 lb → kg 0.4536 Weight
°F → °C (°F - 32) × 5/9 Temperature
°C → °F (°C × 9/5) + 32 Temperature
1 US cup → mL 236.59 Volume
1 hour → minutes 60 Time

Frequently Asked Questions

What is a unit converter? +
A unit converter is a tool that translates a measurement from one unit to another — for example, converting centimeters to inches, kilograms to pounds, or Fahrenheit to Celsius. Each conversion uses a fixed mathematical factor.
What is the difference between metric and imperial units? +
Metric units (meters, kilograms, Celsius) are used by most countries and are based on powers of 10. Imperial units (feet, pounds, Fahrenheit) are primarily used in the US, UK, and a few other countries. Converting between the two requires specific conversion factors.
How do I convert between metric and imperial? +
Multiply the value by the conversion factor for that unit pair. For example: cm to inches, multiply by 0.3937. Kg to lbs, multiply by 2.2046. Miles to km, multiply by 1.6093. Our converters handle the math automatically.
Why are there different measurement systems? +
The imperial system evolved from older English units, while the metric system was created during the French Revolution for universal standardization. Most countries adopted metric, but the US retained imperial for everyday use.
Which unit converter should I use? +
Use the converter that matches your measurement type: CM to Inches or Feet to Meters for length, KG to LBS for weight, Fahrenheit to Celsius for temperature, Miles to KM for distance, Cups to ML or the Cooking Converter for recipes.
Are these unit conversions exact? +
Yes. All conversions use internationally standardized factors (e.g., 1 inch = exactly 2.54 cm, 1 kg = exactly 2.20462 lbs). Results are calculated with full precision and rounded for readability.