Feet

Dimensional Metrology & NIST SP 811 Standards

Under the International Yard and Pound Agreement of 1959, 1 international foot is legally defined as exactly 0.3048 meters (12 inches). Effective January 1, 2023, the historic US Survey Foot was officially deprecated in favor of the international foot.

Primary Length Scale Equivalents

• 1 Foot (ft): = 12 Inches = 0.3048 Meters = 30.48 cm = 304.8 mm

• 1 Yard (yd): = 3 Feet = 36 Inches = 0.9144 Meters

• 1 Statute Mile (mi): = 5,280 Feet = 1,760 Yards = 1,609.344 Meters

• 1 Meter (m): = 3.280839895 Feet = 39.3700787 Inches

How to Use This Calculator

Enter your Length in Feet (ft) (e.g. 20.0 in ft). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Conversion factors used in this calculator:

1 Foot = 12 inches

Worked Example

A 20-foot residential room length measures exactly 240 inches, 6.67 yards, or 6.096 meters across the floor.

Understanding Your Result

Unit conversion precision: round to the same number of significant figures as your original measurement. Converting 6 feet to meters gives 1.8288 m — but if your measurement was approximate (±1 inch), expressing more than 2 decimal places is false precision. For international trade and technical specifications, SI units (meters, kilograms, liters) are the standard. US customary units (feet, pounds, gallons) differ from Imperial UK units: 1 US gallon = 3.785 L vs. 1 UK gallon = 4.546 L.