Batch Tire Size Calculator
Process many tire sizes at once. Paste a list and get diameter, width, sidewall, revs and percent difference for every size in one table.
Process multiple candidate sizes.
Batch Tire Size Calculator: Tire Size Inputs
Compare two tire sizes here. Use the formulas and reference tables below for this tool's specific calculation.
How Batch Tire Size Calculator Works?
The Batch Tire Size Calculator works by reading a pasted list of sizes, validating each line and running the same calculations on every valid line. The tool uses 4 steps.
Paste the list
Paste sizes one per line, or a CSV column, for example 50 sizes from a supplier export.
Set the reference
Pick one size as the reference for percent difference, for example 205/55R16.
Validate and calculate
The calculator normalizes each line, skips invalid lines with an error note, and computes every dimension.
Export the results
Download the results as CSV for a spreadsheet or copy the table.
Batch Tire Size Calculator Formula
The Batch Tire Size Calculator applies the same formula set to every row i: OD_i, C_i, RPM_i and Δ%_i against the reference.
OD_i = 2 × W_i × AR_i ÷ 100 + Rim_i × 25.4RPM_i = 1,609,344 ÷ (π × OD_i)Δ%_i = (OD_i − OD_ref) ÷ OD_ref × 100n_valid = n_total − n_errors- i
- Row number
- OD_ref
- Reference diameter (mm)
- n_errors
- Lines that failed validation
Worked example
A pasted list of 8 sizes on 16-inch rims, checked against 205/55R16, returns 8 valid rows. The tallest size, 215/60R16, sits at +5.14%, and the closest size, 225/50R16, sits at −0.08%.
Batch Tire Size Calculator Conversion Table
The Batch Tire Size Calculator conversion table shows a sample batch of 8 pasted sizes processed against a 205/55R16 reference.
| Input | Diameter (mm) | Diameter (in) | Revs per mile | Δ vs reference |
|---|---|---|---|---|
| 205/55R16 | 631.9 mm | 24.88 in | 811 | +0.00% |
| 215/55R16 | 642.9 mm | 25.31 in | 797 | +1.74% |
| 225/50R16 | 631.4 mm | 24.86 in | 811 | -0.08% |
| 205/60R16 | 652.4 mm | 25.69 in | 785 | +3.24% |
| 215/60R16 | 664.4 mm | 26.16 in | 771 | +5.14% |
| 225/55R16 | 653.9 mm | 25.74 in | 783 | +3.48% |
| 195/65R16 | 659.9 mm | 25.98 in | 776 | +4.43% |
| 235/50R16 | 641.4 mm | 25.25 in | 799 | +1.50% |
What is Batch Tire Size Calculator?
A Batch Tire Size Calculator is a tool that calculates dimensions for a whole list of tire sizes in one run. Inventory lists, supplier catalogs and fleet records hold dozens or hundreds of sizes.
The batch run uses the same validation rules as the Tire Size Input Validator, so a bad line never produces a wrong number.
CSV export puts the results straight into a spreadsheet for sorting and filtering.
What are the uses of Batch Tire Size Calculator?
There are 4 main uses of the Batch Tire Size Calculator, including inventory enrichment and fleet audits.
Inventory enrichment
Add diameter and revs columns to a stock list.
Fleet audits
Check every vehicle's fitted size against its spec.
Catalog building
Generate dimension data for a product catalog.
Data cleanup
Find malformed sizes in a database.