metric to standard conversion calculator

Last Updated on March 2, 2026 | 2 : 46 pm by Anas Brittany

Use this metric conversion chart to quickly convert common measurements between metric (SI) and U.S. customary units. You can also use the unit conversion calculator below to convert length, weight, volume, and temperature instantly—perfect for cooking, travel, schoolwork, and everyday measurements.

Metric Conversion Chart for Common Units

A metric conversion chart is a quick reference table that helps you convert measurements between the metric system (SI) and other systems such as U.S. customary units. The metric system is used globally for most science and many everyday measurements, while the United States commonly uses inches, feet, pounds, and Fahrenheit.

Use the chart below for fast lookups, or use the calculator above when you need an exact conversion for any value.

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Length Conversion Chart

• 1 inch = 2.54 centimeters
• 1 foot = 30.48 centimeters
• 1 yard = 0.9144 meters
• 1 mile = 1.609344 kilometers
• 1 meter = 3.28084 feet
• 1 kilometer = 0.621371 miles

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Weight Conversion Chart

• 1 ounce = 28.3495 grams
• 1 pound = 0.453592 kilograms
• 1 kilogram = 2.20462 pounds
• 1 gram = 0.035274 ounces

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Volume Conversion Chart

• 1 teaspoon (US) = 4.92892 mL
• 1 tablespoon (US) = 14.7868 mL
• 1 fluid ounce (US) = 29.5735 mL
• 1 cup (US) = 236.588 mL
• 1 quart (US) = 0.946353 liters
• 1 gallon (US) = 3.78541 liters

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Temperature Conversion Chart

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

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When to Use a Conversion Calculator Instead of a Chart

A conversion chart is best for quick reference, but a unit conversion calculator is better when:

• You need a precise conversion for any number
• You want to compare multiple unit options
• You’re converting uncommon values (like decimals)
• You need temperature conversions (because they aren’t linear like length/weight)