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| Millimetres | Inches | Rainfall context |
|---|---|---|
| 1 mm | 0.04 in | Light drizzle |
| 10 mm | 0.39 in | Moderate day's rain |
| 25 mm | 0.98 in | Heavy rain (about an inch) |
| 50 mm | 1.97 in | Very heavy / flood risk |
| 100 mm | 3.94 in | Extreme downpour |
Rainfall is commonly measured in millimeters worldwide, while inches are used in countries like the United States. Converting between these units helps compare rainfall data across different regions.
Rainfall and precipitation totals are measured in millimetres across most of the world and in inches in the United States, so converting between them is a constant need when comparing weather data, climate figures, or gardening and farming guidance across regions. The conversion is a simple fixed division because both measure the same depth of water. Knowing that 25 millimetres is almost exactly one inch is a handy anchor. This tool converts millimetres to inches instantly and gives context on what each total means in real weather terms.
To convert millimeters to inches, divide by 25.4. This tool performs the calculation instantly for quick and accurate results.