Exact versus approximate factors
Some conversion factors are defined exactly, such as 1 inch = 2.54 centimeters. Displayed results may still be rounded for readability.
Area needs squared factors
When converting area, the linear conversion factor is squared. That is why square-foot and square-meter conversions differ from foot-to-meter conversions.
Volume conventions matter
US fluid ounces, cups, tablespoons, teaspoons, and gallons are not the same as every imperial convention. Our cooking pages identify the convention used.
Related working tools
Converters
Centimeters to Inches
Convert centimeters to inches with a precise metric-to-imperial conversion.
Open tool → ConvertersKilograms to Pounds
Convert kilograms to pounds for weight and mass comparisons.
Open tool → Real EstateSquare Feet to Square Meters
Convert square feet to square meters for property and floor-area comparisons.
Open tool → ConvertersGallons to Liters
Convert US liquid gallons to liters.
Open tool →