Conversion Result
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Inches (in)
About This Converter
- What it does
- Converts decimal feet to total inches with reverse conversion.
- Input
- Length in feet (ft)
- Output
- Total inches (in); reverse feet value
- Formula
- inches = feet × 12 (exact)
- Last updated
About Feet to Inches Conversion
Feet and inches are both imperial units. One foot equals exactly 12 inches. Converting feet to inches is useful when you need to work with a measurement system that prefers total inches — for example, mattress sizes, wall panel widths, and many US building codes. Converting height from feet to total inches is also required by sports and medical databases.
Conversion Formula
inches = feet × 12
Multiply the number of feet by 12 to get total inches. Since the foot is defined as exactly 12 inches, this conversion is exact.
Worked Example
Convert 5.5 feet to inches: 5.5 × 12 = 66 inches. Another: 6 feet × 12 = 72 inches.
Common Use Cases
- Converting a person's height from feet to inches for a medical or sporting database
- Buying a mattress — standard US sizes (Twin, Full, Queen) are listed in inches
- Woodworking: project plans in feet converted to inches for precise cutting measurements
- Fabric and curtain lengths given in feet converted to inches for sewing patterns
- Ceiling height: 8 feet = 96 inches — useful for drywall and trim calculations
Frequently Asked Questions
5 feet × 12 = 60 inches.
6 feet × 12 = 72 inches.
5 × 12 + 7 = 60 + 7 = 67 inches.
5 × 12 + 9 = 60 + 9 = 69 inches.
4 feet × 12 = 48 inches.
1 foot = 12 inches exactly.
10 feet × 12 = 120 inches.
Multiply feet by 12, then add the remaining inches. Example: 5 ft 6 in = (5 × 12) + 6 = 66 inches total.
Important Notes
- 1 foot = 12 inches is exact by definition.
- Enter feet as a decimal for compound values: 5 ft 6 in = 5.5 ft.
- For cm-to-inches compound output, use the Centimeters to Feet & Inches converter.
- Results are exact when the input is a whole or simple fractional number of feet.