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Inch Converter

Convert inches to centimetres, millimetres, feet, yards, or metres, and back again.

Formula shown0 inputs definedUpdated Nov 2025By CalcuTotal TeamFree, no sign-up

Quick Summary

Use this when you need:

Flip cabinet or woodworking plans from inches into millimetres
Check luggage or packaging specs listed in inches against centimetre limits
Compare measurements between inch-based drawings and metre-based site plans

You’ll get:Length

How this is calculated

Formula:

length_target = length_source

In plain language:

Meters are the base. Inches become meters via 1 in = 0.0254 m, then rescale to centimetres, millimetres, feet, yards, or metres as needed.

The formula is always visible so you can verify the math and explain your numbers to anyone who asks.

What these terms mean

Length

Length used in the calculation.

When to use this calculator

Flip cabinet or woodworking plans from inches into millimetres
Check luggage or packaging specs listed in inches against centimetre limits
Compare measurements between inch-based drawings and metre-based site plans

Last updated: November 28, 2025

Inch converter explained

Need to flip inch measurements into metric or other imperial units? This calculator keeps metres as the base so every inch entry can display in millimetres, centimetres, metres, feet, or yards without extra math.

How the conversion works

The inch is defined as 25.4 millimetres. Conversions flow through metres:

1\,\text{in} = 0.0254\,\text{m}

Inches → centimetres: multiply by $2.54$ .
Inches → millimetres: multiply by $25.4$ .
Inches → feet: divide by $12$ .
Inches → yards: divide by $36$ .

Units and conversions

Unit	Symbol	Relation
Millimetre	mm	$1\,\text{mm} = 0.001\,\text{m}$
Centimetre	cm	$1\,\text{cm} = 0.01\,\text{m}$
Metre	m	base
Inch	in	$1\,\text{in} = 0.0254\,\text{m}$
Foot	ft	$1\,\text{ft} = 0.3048\,\text{m}$
Yard	yd	$1\,\text{yd} = 0.9144\,\text{m}$

Worked examples

Shelf depth in inches to centimetres
$12\,\text{in} \times 2.54 = 30.48\,\text{cm}$ ; also $12 \div 12 = 1\,\text{ft}$ .
Millimetres back to inches
$25.4\,\text{mm} \div 25.4 = 1\,\text{in}$ .
Large object to yards
$50\,\text{in} \div 36 = 1.3889\,\text{yd}$ .

Tips and pitfalls

Keep three to four decimals in metres before converting back to inches to protect tight tolerances.
For woodworking, work in millimetres internally and convert to inches only for the cut sheet headings.
When mixing feet and inches, convert both to inches first, do the math, then format back.

References and further reading

Frequently Asked Questions

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Calculator info

Version:: v1.0.0
Last reviewed:: Nov 28, 2025
Sensitivity:: low

Last updated: November 28, 2025

Inch converter explained

How the conversion works

The inch is defined as 25.4 millimetres. Conversions flow through metres:

1\,\text{in} = 0.0254\,\text{m}

Inches → centimetres: multiply by $2.54$ .
Inches → millimetres: multiply by $25.4$ .
Inches → feet: divide by $12$ .
Inches → yards: divide by $36$ .

Units and conversions

Unit	Symbol	Relation
Millimetre	mm	$1\,\text{mm} = 0.001\,\text{m}$
Centimetre	cm	$1\,\text{cm} = 0.01\,\text{m}$
Metre	m	base
Inch	in	$1\,\text{in} = 0.0254\,\text{m}$
Foot	ft	$1\,\text{ft} = 0.3048\,\text{m}$
Yard	yd	$1\,\text{yd} = 0.9144\,\text{m}$

Worked examples

Shelf depth in inches to centimetres
$12\,\text{in} \times 2.54 = 30.48\,\text{cm}$ ; also $12 \div 12 = 1\,\text{ft}$ .
Millimetres back to inches
$25.4\,\text{mm} \div 25.4 = 1\,\text{in}$ .
Large object to yards
$50\,\text{in} \div 36 = 1.3889\,\text{yd}$ .

Tips and pitfalls

Keep three to four decimals in metres before converting back to inches to protect tight tolerances.
For woodworking, work in millimetres internally and convert to inches only for the cut sheet headings.
When mixing feet and inches, convert both to inches first, do the math, then format back.

Quick Summary

Calculator Tool

How this is calculated

What these terms mean

Length

When to use this calculator

Inch converter explained

How the conversion works

Units and conversions

Worked examples

Tips and pitfalls

References and further reading

Frequently Asked Questions

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Was this calculator helpful?

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Calculator info

Inch converter explained

How the conversion works

Units and conversions

Worked examples

Tips and pitfalls

References and further reading

Frequently Asked Questions

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Imperial to Metric Converter

Feet and Inches Calculator

in to cm Converter

Acreage Calculator

Angstrom to nm converter

Centimeter Calculator

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