Feet to Inches Converter

Why convert feet to inches?

Feet and inches are often used together, but sometimes you need a single unit for calculations. Inches are especially useful for measurements, cut lists, DIY projects, product specs, and height conversions, because they remove ambiguity. For example, saying “67 inches” is a single number that can be compared and added easily, while “5 ft 7 in” is more human-friendly but harder to compute with quickly.

The exact relationship: 1 foot equals 12 inches

The feet-to-inches conversion is one of the simplest and most reliable in measurement because it is a fixed standard:

That means the conversion is exact—there’s no temperature factor, density factor, or approximation involved. The only time results differ between tools is when they choose different rounding rules or decimal places for display.

How to convert feet to inches

Multiply the number of feet by 12. This works for both whole feet and decimal feet:

Example: whole feet

If you have 6 feet, then 6 × 12 = 72 inches.

Example: decimal feet

If you have 5.5 feet, then 5.5 × 12 = 66 inches. Decimal feet are common in plans, spreadsheets, and some measurement tools.

Converting “feet and inches” to total inches

If you have a measurement like 5 ft 7 in, convert the feet to inches and add the remaining inches:

So 5 ft 7 in becomes (5 × 12) + 7 = 67 inches.

Converting inches back to feet

You can also go the other direction by dividing by 12:

If you want feet-and-inches format, take the whole number as feet and the remainder as inches. For example, 67 inches:

• Feet = floor(67 ÷ 12) = 5
• Remaining inches = 67 − (5 × 12) = 7
• So 67 inches = 5 ft 7 in

Where this conversion is used most

Height and body measurements

Many forms ask for a single number (inches) while people naturally state height in feet and inches. Converting to inches can also make it easier to compare heights or calculate averages.

DIY, carpentry, and construction

Cut lengths and material sizes are often easier to manage in inches, especially when you’re combining multiple measurements or making repeated cuts. A ft→in conversion also helps when a plan is given in decimal feet but your tools are marked in inches.

Product dimensions

TVs, monitors, furniture, and many tools are listed in inches. Converting feet to inches helps you check whether something fits a space without doing mental math each time.

Sports and fitness tracking

In some regions, performance or profile stats are stored as inches for consistency. Converting your height or reach to inches keeps it in the same format.

Rounding and precision

Because 1 ft = 12 in exactly, the only question is how you want the output displayed. If your input has many decimal places, you may want to round the final inches value:

• Everyday use: round to the nearest whole inch.
• Planning and estimates: 1 decimal place can be enough.
• Detailed measurements: keep 2+ decimals or switch to fractions depending on your tools.

This converter lets you choose decimal places and rounding direction so you can match your use case.

Common mistakes this converter prevents

• Forgetting to multiply decimals: 5.25 ft is 63 in, not 5 ft 2.5 in.
• Mixing formats: treat “5 ft 7 in” differently from “5.7 ft” (they are not the same).
• Rounding too early: keep full precision during intermediate steps.

Quick reference values

• 1 ft = 12 in
• 2 ft = 24 in
• 3 ft = 36 in
• 4 ft = 48 in
• 5 ft = 60 in
• 6 ft = 72 in
• 7 ft = 84 in
• 8 ft = 96 in
• 9 ft = 108 in
• 10 ft = 120 in

Tips for working with decimal feet

Convert once, then keep one unit

If your project uses inches, convert your measurements to inches and keep them there. Switching back and forth is where errors creep in.

Remember: 0.1 ft is 1.2 in

A common quick check is that each tenth of a foot equals 1.2 inches. That helps you sanity-check decimal-feet plans quickly.