Inches per year to millimeters per year
Type a value in ipy to get it in mm/yr instantly.
254mm/yr
That's 51× as fast as poor resistance — nothing on our list beats it. A 10 mm wall would last about 0.03937 years at that rate.
What it means
How fast is it going?
These are uniform corrosion rates. Pitting attacks one spot far faster than the average, so a good overall rate can still perforate a pipe.
The math
How to convert ipy to mm/yr
To convert inches per year to millimeters per year, multiply by 25.4.
Example: 10 ipy × 25.4 = 254 mm/yr.
In the other direction, 1 mm/yr = 0.0393701 ipy.
Every unit
Your rate in every unit
Tables
ipy to mm/yr conversion table
| ipy | mm/yr |
|---|---|
| 0.01 ipy | 0.254 mm/yr |
| 0.05 ipy | 1.27 mm/yr |
| 0.1 ipy | 2.54 mm/yr |
| 0.25 ipy | 6.35 mm/yr |
| 0.5 ipy | 12.7 mm/yr |
| 1 ipy | 25.4 mm/yr |
| 2 ipy | 50.8 mm/yr |
| 5 ipy | 127 mm/yr |
| 10 ipy | 254 mm/yr |
| 25 ipy | 635 mm/yr |
| 50 ipy | 1,270 mm/yr |
mm/yr to ipy conversion table
| mm/yr | ipy |
|---|---|
| 0.01 mm/yr | 0.000393701 ipy |
| 0.05 mm/yr | 0.0019685 ipy |
| 0.1 mm/yr | 0.00393701 ipy |
| 0.25 mm/yr | 0.00984252 ipy |
| 0.5 mm/yr | 0.019685 ipy |
| 1 mm/yr | 0.0393701 ipy |
| 2 mm/yr | 0.0787402 ipy |
| 5 mm/yr | 0.19685 ipy |
| 10 mm/yr | 0.393701 ipy |
| 25 mm/yr | 0.984252 ipy |
| 50 mm/yr | 1.9685 ipy |
Quick answers
Quick answers
- How many mm/yr is 1 ipy?
- 1 ipy is 25.4 mm/yr.
- How many mm/yr is 10 ipy?
- 10 ipy is 254 mm/yr.
The units
About these units
Inches per year (ipy)
For severe attack, where a wall disappears in months.
Millimeters per year (mm/yr)
The international standard for corrosion rate.
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