Length conversion
Foot to Inch converter
Convert ft to in instantly, choose the displayed precision, and verify the result with the formula and reference table below.
Inch (in)
Rounded for display only; calculations retain full precision.
Rounding and precision rules
- Convr calculates first and rounds the displayed result only once, at the final step.
- The default is a maximum of 6 decimal places; trailing zeros are removed.
- Very small values that would appear as zero, and values of 10¹² or more, use scientific notation.
- Display precision is not measurement uncertainty. For scientific, engineering, or regulated work, retain only the digits justified by the source measurement.
Practical context
Understanding this conversion
Feet and inches are commonly combined in measurements of height, room dimensions, lumber, furniture, and construction materials. Converting the complete measurement to inches makes comparison and arithmetic easier.
The relationship is exact within the international yard and pound system. No approximation is needed when converting a whole or decimal number of feet to inches.
Reviewed August 16, 2026.
Calculation
Foot to Inch formula
in = ft × 12
Calculations retain full precision and the result is rounded only for display.
Worked example
For 10 ft, the result is 120 in. Substitute 10 ft into the formula to obtain 120 in.
A numerical value expressed in inch is usually larger than the same measurement expressed in foot, because 1 ft equals 12 in.
Foot to Inch reference table
Common values rounded to a maximum of 6 decimal places.
| Foot (ft) | Inch (in) |
|---|---|
| 1 ft | 12 in |
| 5 ft | 60 in |
| 10 ft | 120 in |
| 50 ft | 600 in |
| 100 ft | 1,200 in |
Understanding the units
About Foot and Inch
Foot (ft)
One foot (ft) equals 0.3048 m, the base relationship used for this length conversion.
Inch (in)
One inch (in) equals 0.0254 m, the base relationship used for this length conversion.
When this conversion is useful
Foot to Inch conversion is useful for dimensions, distances, maps, construction plans, manufacturing specifications, and scientific measurements. It lets you compare the same distance or dimension across documents, tools, or standards that use different units.
Learn with Convr
Conversion guides
Metric vs Imperial Units: A Practical Comparison
Understand how metric, US customary, and Imperial units differ, where each system is used, and how to convert between them reliably.
Read guide →FoundationsSignificant Figures and Rounding in Unit Conversions
Learn when to round conversion results, how significant figures preserve measurement meaning, and why more decimals do not guarantee more accuracy.
Read guide →Answers at a glance
Frequently asked questions
How many inches are in one foot?
There are exactly 12 inches in one foot, so multiply the number of feet by 12.
How do I convert feet and inches into total inches?
Multiply the whole feet by 12, then add the remaining inches. For example, 5 ft 7 in equals 67 inches.
How does Convr round Foot to Inch results?
Convr keeps full numeric precision during the calculation and rounds only the displayed result. The default is a maximum of 6 decimal places, with selectable precision on this page.
Can I convert negative or decimal foot values?
Yes. The converter accepts positive, negative, decimal, and scientific-notation values. Negative values are physically meaningful for some scales, such as temperature, but not for every measured quantity.
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