Tire Size Calculator
Decode P-metric tire codes and calculate overall diameter, sidewall height, and circumference in inches.
Tire Size Calculator
Results
Overall Diameter
27.00"
Sidewall Height
5.50"
Section Width
8.46"
Circumference
84.8"
Circumference (ft)
7.07 ft
Sidewall (mm)
139.8 mm
215/65R16 → 27.00" diameter × 8.46" wide
How to Read a Tire Code
| Part | Example | Meaning |
|---|---|---|
| P | P215/65R16 | Passenger tire (LT = light truck) |
| 215 | P215/65R16 | Section width in millimeters |
| 65 | P215/65R16 | Aspect ratio: sidewall is 65% of width |
| R | P215/65R16 | Radial construction |
| 16 | P215/65R16 | Rim diameter in inches |