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Converter

Unit Converter

Convert length, weight, temperature, and speed units instantly.

How This Tool Works

The Unit Converter converts between measurement units across common categories: length (meters, feet, inches, miles, km), weight/mass (kg, pounds, ounces, grams), temperature (Celsius, Fahrenheit, Kelvin), volume (liters, gallons, cups, fluid ounces), area (square meters, acres, square feet), and speed (km/h, mph, m/s). The most common conversion needs — Celsius to Fahrenheit, kg to pounds, km to miles — are handled instantly.

How to Use

  1. Enter the value to convert in field A.
  2. Enter or select the source and target units in field B.
  3. Click Run. The converted value is shown.
  4. Common quick conversions: 1 kg = 2.205 lbs; 1 mile = 1.609 km; °F = (°C × 9/5) + 32.

Common Questions

How do I convert Celsius to Fahrenheit?

Formula: °F = (°C × 9/5) + 32. For a quick mental estimate: double the Celsius and add 30. 20°C = 68°F exactly; estimate: 20 × 2 + 30 = 70°F (close enough for everyday use).

How many cups in a liter?

1 liter = 4.227 US cups. 1 US cup = 236.6 ml. Note: UK/imperial cups (284 ml) and metric cups used in Australia/Canada (250 ml) differ from US cups. Recipe conversions depend on which cup standard is used.

What is the difference between mass and weight?

Mass (kg, grams, pounds) is the amount of matter in an object — constant regardless of location. Weight is the gravitational force on that mass — lower on the Moon, higher on Jupiter. In everyday use the terms are used interchangeably.