Tire Size Calculator

Calculate tire dimensions and comparison

Mode

Tire 1 (P-metric)

Width (mm)

Aspect Ratio

Rim (in)

Tire: P225/65R17

How It Works

Convert tire size codes and calculate overall tire dimensions.

A tire size calculator converts between metric tire codes (e.g., P225/65R17) and overall tire dimensions. It calculates sidewall height, overall diameter, circumference, and revolutions per mile or kilometer. Understanding tire dimensions helps when replacing tires with an alternative size, checking speedometer accuracy, or selecting tires for custom wheel applications.

Results

Enter values to see results

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Quick Tips

• Results update automatically as you type
• Use Tab to navigate between fields
• Press Enter to calculate

Frequently Asked Questions

How does the Tire Size Calculator work?

Simply enter your values into the input fields above. The Tire Size Calculator uses standard formulas to compute results instantly as you type or click.

Is the Tire Size Calculator free?

Yes, this calculator is completely free to use. No registration, no hidden fees, no limits.

How accurate are the results?

Results are computed using industry-standard mathematical formulas. For critical decisions, we recommend consulting a professional.

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