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Tire Manufacture Date Calculator

Decode the last 4 digits of the DOT code (week + year) on your tire sidewall to find the production date (year, week, approximate month), the tire's age, and the 10-year replacement guideline.

Input

Enter the last 4 digits of the "DOT" code stamped on the tire sidewall (2-digit week + last 2 digits of the year). Example: 2319 means it was made in week 23 of 2023. The month derived from the week is only an approximation.

Result

Production date

Week 23, 2,019

(around month 6)

Production year

2,019

Age (approx.)

approx. 7 yr

Replacement guide (10 years)

2,029

Reading details

Production weekWeek 23
Production year2,019
Approximate production montharound month 6
Age (approx.)approx. 7 yr
Suggested replacement year2,029

* The production month is an approximation derived from the production week. Replacement timing varies by manufacturer and usage, so we recommend a final inspection at a dealer or repair shop.

How it works

  • The DOT code is stamped on the tire sidewall, and its last 4 digits show the production date. The first 2 digits are the production week and the last 2 are the last two digits of the production year. For example, "2319" means the tire was made in week 23 of 2023.
  • The "around month X" value derived from the production week is only an approximation. It uses a simple calculation (week 1 = early January, about 4 weeks per month), so it may differ slightly from the actual production month.
  • The age is the reference year you enter minus the production year. It is useful when buying used tires or before reusing winter tires that have been in storage.
  • Tire rubber deteriorates over time even when the tire is not driven. A common rule of thumb treats 10 years from production as one replacement guideline, but the actual lifespan varies greatly with usage, storage conditions, and remaining tread.
  • Tires made from 2000 onward use the 4-digit format as standard. Some older tires use a 3-digit format, which this tool's 4-digit assumption may not read correctly.
  • The production date and replacement guideline shown here are reference values only. For the actual decision to replace, have the tire inspected at a dealer or repair shop, taking cracking and tread condition into account.