Unit converter · length
Feet to inches converter
Enter a value in feet to get the exact measurement in inches — accurate to four decimal places, updated as you type.
Ruler view — orange marker shows your value along a 3 ft (36 in) scale
Formula
The foot-to-inch conversion is fixed by definition, so the math is simple multiplication:
There are exactly 12 inches in every foot, a ratio set by the international yard and pound agreement of 1959 and used consistently across the US, UK, and every other country still using imperial length units.
Common feet to inches conversions
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Frequently asked questions
How many inches are in a foot?
There are exactly 12 inches in one foot. This is a fixed, internationally standardized conversion.
How do you convert feet to inches?
Multiply the number of feet by 12. For example, 3 feet multiplied by 12 equals 36 inches.
What is 1 foot in inches?
1 foot equals 12 inches.
How do you convert feet and inches to just inches?
Multiply the feet by 12, then add any remaining inches. For example, 5 feet 4 inches is (5 x 12) + 4 = 64 inches.
Conclusion
Converting feet to inches comes down to one simple rule: multiply by 12. Whether you’re measuring furniture, checking room dimensions, or working out material lengths for a construction or DIY project, this feet to inches converter gives you an instant, accurate result without needing to do the math by hand. Bookmark this page for quick access anytime you need to convert feet to inches, inches to feet, or check a measurement against the reference chart above — it’s free, works on any device, and updates in real time as you type.