Measurement & Unit Conversion

Feet and Inches to Decimal Feet Calculator

Measurement & Unit Conversion

Feet and Inches to Decimal Feet Calculator

Live answer5.667 ft5 ft × 12 + 8 in + 0/8 in = 68 total inches · decimal feet 5.66666667 · 172.72 cm · 1.7272 m

Feet (ft)Enter the whole-foot part of the measurement.Inches (in)Enter the inch remainder. Values over 12 are allowed and converted into the total.Extra eighths of an inch (eighths)Optional tape-measure fraction: 1 means 1/8 inch, 4 means 1/2 inch.Cut / clearance allowance (in)Optional allowance kept separate from the measured conversion.Decimal-feet rounding increment (ft)Use 0.001 ft for estimating sheets, or a smaller increment for audit work.

Live result5.667 ft5 ft × 12 + 8 in + 0/8 in = 68 total inches · decimal feet 5.66666667 · 172.72 cm · 1.7272 m

Formula used

Total inches = feet × 12 + inches + eighths ÷ 8. Decimal feet = total inches ÷ 12. Centimetres = total inches × 2.54. Metres = centimetres ÷ 100. Planning decimal feet = (total inches + allowance inches) ÷ 12.

This is the method behind the answer, so the result can be checked rather than simply trusted.

Live math canvas

Your numbers, formula and explanation together

Feet and Inches to Decimal Feet Calculator: 5.667 ft. 5 ft × 12 + 8 in + 0/8 in = 68 total inches · decimal feet 5.66666667 · 172.72 cm · 1.7272 m

Formula applied

The exact method behind this answer

CalculationTime keeps the method visible so the number can be checked instead of blindly trusted.

Total inches = feet × 12 + inches + eighths ÷ 8. Decimal feet = total inches ÷ 12. Centimetres = total inches × 2.54. Metres = centimetres ÷ 100. Planning decimal feet = (total inches + allowance inches) ÷ 12.

Apply the formulaTotal inches = feet × 12 + inches + eighths ÷ 8. Decimal feet = total inches ÷ 12. Centimetres = total inches × 2.54. Metres = centimetres ÷ 100. Planning decimal feet = (total inches + allowance inches) ÷ 12.5.667 ft5 ft × 12 + 8 in + 0/8 in = 68 total inches · decimal feet 5.66666667 · 172.72 cm · 1.7272 m

Your live breakdown

Current inputs in the calculation

These values come from the controls above and update when the calculator changes.

Feet: 5 ft
Inches: 8 in
Extra eighths of an inch: 0 eighths
Cut / clearance allowance: 0 in
Decimal-feet rounding increment: 0.001 ft

Resulting answer

5.667 ft

5 ft × 12 + 8 in + 0/8 in = 68 total inches · decimal feet 5.66666667 · 172.72 cm · 1.7272 m

Answer: 5.667 ft
Live support: 5 ft × 12 + 8 in + 0/8 in = 68 total inches · decimal feet 5.66666667 · 172.72 cm · 1.7272 m

Assumptions used

What this answer assumes

Best for construction estimating sheets, room measurements, product dimensions, cut lists and classrooms where tape-measure notation must become one decimal-foot value without hiding the original measurement.

Feet and inches are treated as international-foot and international-inch measurements.
Extra eighths are added to the inch field before conversion, so 5 ft 8 in and 4 eighths becomes 5 ft 8.5 in.
Inch values over 12 are accepted because the formula uses total inches; the result still reports one decimal-foot total.
Cut or clearance allowance is shown separately from the measured conversion so the original measurement remains auditable.
For structural drawings, code work, fabrication tolerances or supplier orders, confirm the required unit, rounding rule and site measurement before relying on the number.

Master’s Tip

How to use the result well

Master’s Tip: print both the tape-measure form and the decimal-foot result. Estimating sheets often want decimal feet, while site notes and cut lists are easier to check in feet and inches.

Printable record

What belongs in the saved calculation

Save the inputs, result, formula, assumptions, page URL and date together so the calculation can be reviewed later.

Feet: 5 ft
Inches: 8 in
Extra eighths of an inch: 0 eighths
Cut / clearance allowance: 0 in

Visual grid

This result measures part of the space you live in

Length, area, volume and material estimates are grid problems too: measure the space, account for edges and allowances, then turn the pattern into a number you can use.

Micro-timehours, minutes, shiftsHuman scaledays, weeks, projectsMacro-timemonths, years, calendars

Measured output5.667 ft

Space calculations turn a real surface, room, run or volume into cells, edges and allowances that can be quoted, ordered or checked.

5.667 ft5 ft × 12 + 8 in + 0/8 in = 68 total inches · decimal feet 5.66666667 · 172.72 cm · 1.7272 m

Inputs

Feet: 5 ft
Inches: 8 in
Extra eighths of an inch: 0 eighths
Cut / clearance allowance: 0 in
Decimal-feet rounding increment: 0.001 ft

Method

For 5 ft 8 in with 0 extra eighths, total inches = 5 × 12 + 8 = 68 in. Decimal feet = 68 ÷ 12 = 5.6667 ft. The metric cross-check is 68 × 2.54 = 172.72 cm, or 1.7272 m.

Assumptions

Feet and inches are treated as international-foot and international-inch measurements.
Extra eighths are added to the inch field before conversion, so 5 ft 8 in and 4 eighths becomes 5 ft 8.5 in.
Inch values over 12 are accepted because the formula uses total inches; the result still reports one decimal-foot total.
Cut or clearance allowance is shown separately from the measured conversion so the original measurement remains auditable.

Notes

Use this space on the printed report for client, supplier, classroom, job-location, measurement, quote or approval notes.