01 / Example
Example
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5Result
60Length / MULTIVERTO
Feet to inches
Convert feet (ft) to inches (in) in your browser, with the exact unit relationship, a worked example and limits of the result.
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02 / Guide
Feet to inches — How it works
What this unit change means
The input in feet (ft) and the answer in inches (in) represent the same length. Only the measuring scale changes. Read the source label ft before entering a ft figure; an isolated number cannot reveal which convention was used. Keep the destination label in beside the converted number in a in drawing, record or message. A ft entry still depends on the original measurement; expressing it in in cannot supply missing facts.
A foot contains exactly twelve inches. Read furniture dimensions and workshop drawings carefully: 5 ft 7 in means 67 in after combining the two parts, not 5.7 ft. Keep the original mixed-unit measurement beside the converted length.
Formula and a worked example
For this specific direction, multiply the ft value by 12 to obtain in. The relation comes from the definitions of the two units. It is safer to write 5 ft × 12 than to remember a decimal without its units: the written symbols make a reversed factor easier to catch. The converter keeps the numeric calculation separate from the way the number is displayed.
Enter 5 ft in the field. The result is 60 in. To verify the magnitude without the widget, multiply the input by the factor shown above and compare the order of magnitude. Keep the original ft figure beside the result when you share it. That lets another reader check the direction of conversion and the number of significant digits in the source.
At 2.5 ft, the target scale shows 30 in. With 10 ft, it shows 120 in. The ft figure changes fourfold between these checkpoints, as does the in figure. A row using 10 ft but reporting 30 in signals a copied result, an incorrect cell reference, or an inverse factor. Inspect that row before importing the in column into another calculation.
Where the result is useful
Suppose a shelf specification lists 2.5 ft of clear space. It is 30 in, which can be compared with an item label already in inches. Before buying, allow for hinges, trim and the measuring tolerance; a mathematically exact unit change cannot guarantee the item fits. If another drawing shows 2 ft 6 in, combine that mixed notation separately and notice that it also equals 30 in.
Precision and limitations
The defined ft to in relationship can be exact even when a shortened in decimal appears on screen. A legible in answer does not imply that the original ft measurement had twelve reliable digits. Round the in value after any dependent calculations. For a ft limit in a contract or safety record, inspect the original measurement and the relevant in reporting convention as well as this arithmetic.