Feet to Meters Converter

Background.

A US general contractor bidding on an international project receives architectural drawings from a European design firm, and every dimension on the plan is in meters, while the contractor's crew measures lumber, ceiling heights, and room dimensions in feet on site every day. A 10-foot ceiling height called out on the American framing plan needs to become a metric figure the European structural engineer can check against, and getting it wrong by even a rounded decimal can throw off a beam calculation or a door header height. This calculator converts feet to meters using the exact factor of 0.3048 meters per foot — not an approximation, but the value that follows directly from the 1959 International Yard and Pound Agreement, which fixed 1 foot at exactly 12 inches of 2.54 cm each, or 30.48 cm, or 0.3048 m. Because it is a definitional relationship rather than a measured one, there is no rounding uncertainty to carry through a set of construction drawings. The calculator also returns the equivalent in centimeters, since blueprint annotations and finish-carpentry specifications often need centimeter-level precision rather than meters alone. Enter any length in feet — a wall height, a room span, a stud spacing — to get the exact metric equivalent for a mixed-unit job site or drawing set.

What is feet to meters calculator?

The foot is a US customary/imperial unit of length equal to 12 inches, while the meter is the base unit of length in the metric (SI) system. Since 1 July 1959, the foot has been defined as exactly 0.3048 meters by international agreement, following from the inch's exact 2.54 cm definition (12 × 2.54 cm = 30.48 cm = 0.3048 m). This calculator multiplies the entered foot value by 0.3048 to get meters, and by a further 100 to get centimeters, using exact decimal arithmetic so that construction and architectural dimensions — often specified to a fraction of an inch or a millimeter — convert without rounding drift.

How to use this calculator.

1. 01Enter the length you want to convert, in feet.
2. 02The calculator returns the precise equivalent in meters.
3. 03Check the centimeter output for finish-level dimensions like trim, stud spacing, or door heights.
4. 04Use the reverse meters-to-feet calculator if your source drawing is metric and you need imperial figures for site work.

The formula.

The conversion multiplies the input value in feet by 0.3048, the exact number of meters in one foot. This factor follows directly from the inch's exact definition: 1 foot equals 12 inches, and 1 inch equals 2.54 centimeters exactly, so 1 foot equals 12 × 2.54 = 30.48 centimeters, or 0.3048 meters, fixed since 1 July 1959 by the International Yard and Pound Agreement. In the worked example, a 10-foot ceiling height multiplies by 0.3048 to give 3.048 meters, and multiplying by 100 gives 304.8 centimeters. Because the relationship is definitional rather than measured, the calculator's use of arbitrary-precision decimal arithmetic — rather than native floating-point — means the result carries no rounding error beyond the display precision chosen at the end, which matters when a single conversion feeds into a longer chain of structural or framing calculations.

A worked example.

Frequently asked questions.

References& sources.

1. [1]NIST. SI Units — Length.
2. [2]NIST (2008). Special Publication 811: Guide for the Use of the International System of Units (SI), Appendix B — Conversion Factors.