Unit conversion is a fundamental skill in science, engineering, cooking, and everyday life. This guide covers the most common conversions with formulas and practical examples.

Length Conversion

The most common length conversions involve metric and imperial systems:

From	To	Multiply By
Inches	Centimeters	2.54
Feet	Meters	0.3048
Miles	Kilometers	1.60934
Yards	Meters	0.9144

Example: Convert 10 inches to centimeters: 10 × 2.54 = 25.4 cm

Weight Conversion

From	To	Multiply By
Pounds	Kilograms	0.453592
Ounces	Grams	28.3495
Kilograms	Pounds	2.20462

Temperature Conversion

Temperature conversion uses different formulas (not simple multiplication):

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

Quick reference: -40°F = -40°C (the point where both scales meet)

Volume Conversion

From	To	Multiply By
US Gallons	Liters	3.78541
US Gallons	UK Gallons	0.83267
Fluid Ounces (US)	Milliliters	29.5735

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