Inches to Centimetres

Convert inches to centimetres instantly, right here.

Maintained by Roshan.

Use Inches to Centimetres

Converts inches to centimetres in this tab, with nothing sent anywhere.

Inches

Runs entirely on your deviceThe conversion happens in this browser tab. Nothing you type is uploaded, logged or stored, which is worth knowing for anything you would not paste into a search box.

Centimetres

Type or paste, then run.

The result will appear here.

A 27-inch monitor has a 68.58 cm diagonal. That number does not give its width or height, which also depend on aspect ratio and bezel size; use the manufacturer's dimensions when checking whether it fits a desk.

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About Inches to Centimetres

Inches describe screens, tyres, paper and countless product dimensions, but a metric form, a European supplier or a science task needs centimetres. Converting inches to centimetres turns those imperial figures into the metric unit most of the world builds and measures in. One inch is exactly 2.54 centimetres, a definition rather than an approximation, so the conversion is precise: a 15-inch laptop is 38.1 cm wide. Furniture and appliance listings from US sites quote inches, so converting to centimetres is what lets you check whether a piece will actually fit the metric space you measured at home. Tyre and wheel sizes given in inches convert to centimetres when you are checking clearances or ordering from a metric parts catalogue. Convert a mixed inch fraction to a decimal before entering it, so 2 1/2 inches is entered as 2.5.

Using Inches to Centimetres

Type a number of in. You can paste a value with its unit; the tool reads the number.
The exact factor is applied and the result is shown as cm, updating live as you type.
Copy the answer, or switch to the reverse converter to go from cm back to in.

Where inches to centimetres helps

A screen size in metric

A 27-inch monitor is about 68.6 cm across the diagonal.

Both directions

Need the opposite? The cm-to-in converter is linked below and uses the exact inverse factor.

Read a fraction before entering a decimal

A 7.5 inch measurement converts to 19.05 cm. If a drawing says 7 1/2 inches, enter 7.5, not 7.12. Fractions on a tape measure represent divisions of an inch; multiplying the correctly interpreted measurement by 2.54 preserves that scale.

Before you use the result

The result is rounded for readability, so a value converted and then converted back may differ in the last decimal place. The underlying factor is exact.
Units in your input are ignored - only the number is read - so make sure the figure you type is really in in.

Questions about Inches to Centimetres

Is an inch exactly 2.54 cm?

Yes - the inch is defined as exactly 2.54 centimetres, so inches-to-centimetres is an exact conversion, not an estimate.

Is my data uploaded?

No. Inches to Centimetres does the arithmetic in this browser tab; the value is calculated on your device and is not sent to a server.