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Unit Converter

Category
Conversions
— mm (Millimeter)
— cm (Centimeter)
— m (Meter)
— km (Kilometer)
— in (Inch)
— ft (Foot)
— yd (Yard)
— mi (Mile)

What Is Unit Conversion?

Unit conversion is the process of expressing a quantity in a different unit of measurement while preserving the same underlying value. The world uses two major measurement systems — the metric system (meters, kilograms, liters) used by most countries, and the imperial system (feet, pounds, gallons) used primarily in the United States. Converting between these systems is a frequent need in cooking, travel, science, engineering, and international trade. This tool handles conversions across four categories instantly and accurately.

How to Use

Select a category (length, weight, volume, or speed), enter a value, and choose the source unit. All conversions within that category are displayed instantly.

Supported Units

Length: mm, cm, m, km, in, ft, yd, mi. Weight: mg, g, kg, oz, lb, metric ton. Volume: ml, L, US gal, qt, pt, cup, fl oz. Speed: m/s, km/h, mph, knots, ft/s.

Common Use Cases

  • Cooking — convert recipe measurements between metric and imperial cups, ounces, and grams
  • Engineering — translate specifications between metric and imperial systems
  • International trade — convert product dimensions and weights for shipping
  • Travel — understand speed limits, distances, and weights in different countries
  • Fitness — convert between kilograms and pounds for workout tracking

Supported Categories

  • Length — from millimeters to miles, covering both metric and imperial units
  • Weight — from milligrams to metric tons, including ounces and pounds
  • Volume — from milliliters to gallons, including cooking measurements
  • Speed — from meters per second to knots, covering land, sea, and air

Privacy

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