Converters

Inch Converter

Convert inches, centimeters, millimeters, and feet in one precise unit tool.

Best for: Product dimensions, Workshop and woodworking cuts

Quick answer

Convert inches, centimeters, millimeters, and feet in one place. Enter a value, choose the source and target units, and get the converted measurement immediately.

Overview

This tool is built for exact unit changes between the four most common length formats tied to inches. It handles both directions in the same interface, so you can move from imperial to metric or back again without changing tools. Use it when you need measurements for product listings, workshop cuts, room layouts, drawings, screen sizes, or packaging dimensions. The results are straightforward and the unit pair can be changed whenever the reference point changes. Because the converter includes feet as well as inch-based and metric units, it works well for mixed specification sheets where numbers are written in different systems. That makes it easier to compare dimensions without doing the math by hand.

Use cases

  • Product dimensionsConvert supplier specs from inches into centimeters or millimeters for catalog entries, labels, and fit checks.
  • Workshop and woodworking cutsSwitch between feet, inches, and millimeters when marking boards, trims, or machine settings.
  • Room and furniture planningCompare furniture sizes and clearances written in different unit systems before placing an order.
  • Drawing and print measurementsMove between imperial and metric dimensions when preparing layouts, mockups, or technical sheets.

How it works

  1. 1

    Type the length value you want to convert.

  2. 2

    Select the unit you have and the unit you need.

  3. 3

    Read the result, then switch the direction if you want the reverse value.

Examples

Monitor size conversion

Input: 27 inches to cm

Output: 68.58 centimeters

Useful when a screen size is listed in imperial units but your document uses metric.

Trim board length

Input: 8.5 feet to inches

Output: 102 inches

Handy for cutting material to an exact length from a plan written in feet.

Small part conversion

Input: 18 mm to inches

Output: 0.7087 inches

Suitable for hardware or replacement parts measured in millimeters.

FAQ

Can I convert between any two supported units directly?

Yes. Choose the starting unit and the target unit from inches, centimeters, millimeters, or feet.

Why does a conversion sometimes show several decimal places?

Some unit pairs do not convert to a whole number, so the result may keep decimals to preserve precision.

What should I check if the result looks wrong?

Make sure the value and the unit direction are both correct. A common mistake is entering the right number with the wrong starting unit.

Does the tool treat feet as decimal feet or feet-and-inches notation?

It converts decimal numeric values. If you have a mixed format like 5 ft 7 in, convert the parts separately first.