Unit Conversion Guide: From Metric to Imperial
Navigating between metric and imperial systems can be confusing. This guide makes it simple with clear formulas, examples, and quick reference tables.
Most of the world uses the metric system, but imperial units (feet, miles, pounds, Fahrenheit) are still common — especially in the US and in many online resources. Knowing how to convert between them is a practical everyday skill.
Length Conversions
1 inch = 2.54 cm | 1 foot = 30.48 cm | 1 mile = 1.609 km | 1 metre = 3.281 feet. Quick trick: to convert km to miles, multiply by 0.621. To convert miles to km, multiply by 1.609.
Weight Conversions
1 kg = 2.205 pounds | 1 pound = 0.453 kg | 1 stone = 6.35 kg. For cooking: 1 ounce = 28.35 grams.
Temperature Conversions
Celsius to Fahrenheit: multiply by 9/5 and add 32. Fahrenheit to Celsius: subtract 32 and multiply by 5/9. Key reference points: 0°C = 32°F (freezing), 100°C = 212°F (boiling), 37°C = 98.6°F (body temperature).
Volume Conversions
1 litre = 0.264 US gallons | 1 US gallon = 3.785 litres | 1 cup = 240 ml | 1 tablespoon = 15 ml | 1 teaspoon = 5 ml.
Use CalciHub's Converter Tools
Instead of memorising formulas, use CalciHub's dedicated converters: Length Converter, Weight Converter, Temperature Converter, Volume Converter, and Cooking Converter — all free and instant.
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