All Tire Calculators

Convert tire pressure between PSI and Kilopascals.

Compare P-Metric tire dimensions side-by-side.

Calculate speedo error from tire size changes.

Convert tire pressure units: PSI and kPa.

Convert between wheel offset and backspace.

See how tire size changes impact effective gear ratio.

Calculate engine RPM at speed based on tire size & gear ratios.

Analyze diameter differences for staggered tire setups.

Calculate total tire height from P-Metric specs.

Check if a tire width is suitable for a given rim width.

Find the aspect ratio for a target tire diameter.

Find max load capacity from load index number.

Find max speed capability from a tire's speed rating letter.

Explore tire options for different wheel sizes.

Assess if a tire is stretched or pinched on a rim.

Estimate a tire's effective radius under load.

Determine tire age from the DOT date code.

Convert tire load range to ply rating and max PSI.

Compare spare tire diameter with primary tires for safety.

Understand Treadwear, Traction, and Temperature ratings.

Estimate inner/outer clearance changes for new setups.

Estimate tire contact patch area from load and pressure.

Calculate tire sidewall height from P-Metric specs.

Calculate tire revolutions per mile and kilometer.

Estimate the internal air volume of a tire.

Calculate total tire diameter from P-Metric specs.

Understand camber and its effects on wear and handling.

Understand caster and its influence on steering stability.

Learn how toe-in/toe-out affects tire wear and stability.

Understand what a tire's UTQG treadwear rating signifies.

Understand a tire's UTQG temperature grade (A, B, or C).

Estimate remaining tread depth and prorated value of a tire.