CalculationTime

Feet and Inches to Centimetres Calculator

Convert feet and inches directly into centimetres, metres and total inches with the exact international-inch basis and a printable height or measurement record.

Live math canvas

Your numbers, formula and explanation together

Feet and Inches to Centimetres Calculator: 177.8 cm. 5 ft × 12 + 10 in = 70 total inches · 177.8 cm · 1.778 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. Centimetres = total inches × 2.54. Metres = centimetres ÷ 100. Planning centimetres = centimetres + optional allowance.
  1. Apply the formulaTotal inches = feet × 12 + inches. Centimetres = total inches × 2.54. Metres = centimetres ÷ 100. Planning centimetres = centimetres + optional allowance.177.8 cm5 ft × 12 + 10 in = 70 total inches · 177.8 cm · 1.778 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
Enter the whole-foot part of the height, product dimension, cut length or room measurement.
Inches
10 in
Enter the remaining inches. Decimal inches are accepted, and values above 12 are converted through total inches.
Optional allowance or tolerance
0 cm
Use only for a separate planning buffer such as clearance, shoe/hat allowance, cut tolerance or installation margin.

Resulting answer

177.8 cm

5 ft × 12 + 10 in = 70 total inches · 177.8 cm · 1.778 m

Answer
177.8 cm
Live support
5 ft × 12 + 10 in = 70 total inches · 177.8 cm · 1.778 m

Assumptions used

What this answer assumes

Best for height records, product dimensions, classroom worksheets, clearance notes, fit checks and job records where the centimetre answer must stay tied to the original imperial measurement.

  • 1 foot is exactly 12 inches.
  • The international inch is exactly 2.54 centimetres, so the conversion factor is exact.
  • The optional allowance is a separate planning note; it does not change the measured feet-and-inches conversion.
  • Round only after deciding the record, classroom, clothing, clearance, drawing or job tolerance needed.

Master’s Tip

How to use the result well

Master’s Tip: keep the original feet-and-inches measurement on the printed record. The centimetre result is exact, but the source dimension prevents mix-ups when a height chart, product listing, drawing or site note still uses imperial units.

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
Enter the whole-foot part of the height, product dimension, cut length or room measurement.
Inches
10 in
Enter the remaining inches. Decimal inches are accepted, and values above 12 are converted through total inches.
Optional allowance or tolerance
0 cm
Use only for a separate planning buffer such as clearance, shoe/hat allowance, cut tolerance or installation margin.

Embeddable calculator

Embed this calculator

Copy a clean iframe version with the required CalculationTime attribution link built in.

Formula

Total inches = feet × 12 + inches. Centimetres = total inches × 2.54. Metres = centimetres ÷ 100. Planning centimetres = centimetres + optional allowance.

Worked example

For 5 ft 10 in, total inches = 5 × 12 + 10 = 70 in. Centimetres = 70 × 2.54 = 177.8 cm. Metres = 177.8 ÷ 100 = 1.778 m. With a 2 cm allowance, the planning length is 179.8 cm.

Professional note

Master’s Tip: keep the original feet-and-inches measurement on the printed record. The centimetre result is exact, but the source dimension prevents mix-ups when a height chart, product listing, drawing or site note still uses imperial units.

Regional and unit assumptions

Standard or basis: the page uses the international inch relationship, where 1 inch equals exactly 2.54 centimetres and 1 foot equals exactly 12 inches. It is a length conversion, not a sizing, medical, compliance or material-ordering rule.

Assumptions and limitations

Methodology & Accuracy

How this calculator is checked

CalculationTime pages are built around visible arithmetic: the formula, assumptions, worked example and practical limitations are shown so the result can be checked rather than simply trusted.

Formula used

Total inches = feet × 12 + inches. Centimetres = total inches × 2.54. Metres = centimetres ÷ 100. Planning centimetres = centimetres + optional allowance.

Standard or basis

Standard or basis: the page uses the international inch relationship, where 1 inch equals exactly 2.54 centimetres and 1 foot equals exactly 12 inches. It is a length conversion, not a sizing, medical, compliance or material-ordering rule.

Where a calculator follows a named legal, trade or industry standard, that standard is cited visibly. Otherwise the page uses transparent general arithmetic and states its limits.

Master's Tip

Master’s Tip: keep the original feet-and-inches measurement on the printed record. The centimetre result is exact, but the source dimension prevents mix-ups when a height chart, product listing, drawing or site note still uses imperial units.

Related calculators

These cards are resolved from calculator data, category context and live-route status so the page links to useful next steps without hand-built link clutter.

ConversionsFeet and Inches to Metres and Centimetres CalculatorConvert height, product dimensions or building measurements from feet and inches into metres and centimetres using the exact international inch definition and a printable measurement record.Open calculatorConversionsInches to Centimetres CalculatorConvert inches into centimetres and metres using the exact international inch definition.Open calculatorConversionsCentimetres to Feet and Inches CalculatorConvert centimetres to feet and inches for height records, product dimensions, cut notes and classroom worksheets.Open calculatorMeasurement & ConversionMeters to Feet and Inches CalculatorConvert meters into feet and inches, decimal feet, total inches and centimeters with the exact meter-to-inch basis and printable height or measurement record visible.Open calculatorConversionsMetres and Centimetres to Feet and Inches CalculatorConvert metric lengths from metres and centimetres into feet and inches using the exact international inch definition.Open calculatorConversionsFeet to Centimetres CalculatorConvert decimal feet into centimetres, metres and inches using the exact international-foot definition.Open calculator

Questions

How do I convert feet and inches to centimetres?

Multiply feet by 12, add the remaining inches, then multiply total inches by 2.54. That gives centimetres.

What is 5 feet 10 inches in centimetres?

5 feet 10 inches is 70 total inches. 70 × 2.54 = 177.8 centimetres.

Is 1 inch exactly 2.54 centimetres?

Yes. The international inch is exactly 2.54 centimetres, so inch-to-centimetre conversion is exact before display rounding.

Can I enter more than 12 inches?

Yes. The calculator uses total inches, so 5 ft 14 in is treated as 74 total inches before converting to centimetres.

What should I print for a feet-and-inches-to-centimetres record?

Print the original feet, inches, total inches, centimetres, metres, any separate allowance, formula, assumptions, page date and notes about what the measurement is for.

Calculation note

Feet-and-inches readings remain common for human height, product dimensions, workshop notes and older plans, while centimetres are standard in many metric records. The safest conversion keeps the imperial source, total inches and centimetre result together instead of replacing one context with another.

The exact conversion runs through total inches

Mixed feet-and-inches measurements are easiest to audit when they are first reduced to total inches. Once the total inch count is known, multiplying by 2.54 gives the centimetre value without an approximate factor.

Centimetres are useful but source units still matter

A centimetre result is easy to compare with metric charts, forms and product specifications. Keeping the original feet and inches beside it helps later readers see whether a number was measured, converted or rounded.

Allowances belong outside the conversion

Clearance, footwear, packaging, cutting tolerance or installation margin can be useful, but those are planning decisions. The printed report separates the exact conversion from the optional allowance so the arithmetic remains clean.

Sources and further readingNIST Handbook 44 Appendix C — General Tables of Units of MeasurementBIPM SI Brochure