Complete Guide to Unit Conversion — Length, Weight, Temperature & More

Unit conversion is a fundamental skill needed in science, cooking, travel, engineering, and everyday life. Whether you need to convert kilometres to miles, kilograms to pounds, or Celsius to Fahrenheit — understanding how units relate to each other saves time and prevents costly mistakes.

Length Conversion

Length is one of the most commonly converted units. The metric system (metres, kilometres) is used in most of the world, while the imperial system (feet, miles, inches) is used primarily in the United States.

• 1 kilometre (km) = 0.621371 miles
• 1 mile = 1.60934 kilometres
• 1 metre (m) = 3.28084 feet
• 1 foot = 0.3048 metres
• 1 inch = 2.54 centimetres

Weight Conversion

Weight conversion is essential for cooking, fitness, shipping, and medicine. The main units are kilograms (metric) and pounds/ounces (imperial).

• 1 kilogram (kg) = 2.20462 pounds (lbs)
• 1 pound = 0.453592 kilograms
• 1 gram (g) = 0.035274 ounces
• 1 ounce (oz) = 28.3495 grams
• 1 tonne = 1000 kg = 2204.62 pounds

Temperature Conversion

Temperature conversion is the one area where you cannot simply multiply by a fixed number — you also need to add or subtract an offset.

• Celsius to Fahrenheit: (°C × 9/5) + 32 = °F
• Fahrenheit to Celsius: (°F − 32) × 5/9 = °C
• Celsius to Kelvin: °C + 273.15 = K

Speed Conversion

• 1 km/h = 0.621371 mph
• 1 mph = 1.60934 km/h
• 1 knot = 1.852 km/h
• 1 m/s = 3.6 km/h

Data Storage Conversion

In the digital world, understanding data units is increasingly important — especially when comparing cloud storage plans, internet speeds, and file sizes.

• 1 Kilobyte (KB) = 1,024 Bytes
• 1 Megabyte (MB) = 1,024 KB
• 1 Gigabyte (GB) = 1,024 MB
• 1 Terabyte (TB) = 1,024 GB

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