Practical measurement guide
Inch to MM Chart
Find common inch values converted to millimeters using the exact 25.4 factor.
Inch to MM Chart provides server-rendered reference rows and links to calculators for custom measurements.
in
Decimals and fractions work, for example 1.5, 1/2, or 1 1/2.
cm
Try a value
Fractions
10 in = 25.4 cm
10 in × 2.54 = 25.4 cm
Decimal inches10 in
Feet + inches0 ft 10 in
Nearest 1/16 inch10"
How to use this chart
Use the table for quick lookup, then use the converter when you need a custom value or more decimal precision.
Reference rows
| Input | Output | Note |
|---|---|---|
| 1 inch | 25.4 mm | Exact inch definition |
| 1 foot | 0.3048 m | Exact foot definition |
| 1 meter | 100 cm | Metric scaling |
CSV and filtering note
The table is server-rendered for crawling and accessibility. If filtering or CSV export is added later, it should not create indexable query-parameter pages.
Related measurement tools
Frequently asked questions
Are chart values exact?
Metric-to-metric values are exact; imperial-to-metric values use the official length definitions and may be rounded for display.
Should I use a chart or calculator?
Use the chart for common values and the calculator for custom measurements.
Do charts create indexed filter pages?
No. Filtering must not create indexable query-parameter URLs.