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Tire Date Code Decoder

How old is my tire?

Type the date code from the side of a tire and see when it was made and how old it is.

One Click Answers · Tire Date Code Decoder
oneclickanswers.com/tire-date-code-decoder · Printed
About this tool & how to use it

What it does

Reads the four-digit date code at the end of a tire's DOT code and tells you the week and year it was made and how old it is today. It gives no replacement age.

How to use it

  1. Find the DOT code on the sidewall of the tire. The date is the last four digits.
  2. Type the four digits (or the whole DOT code) into the box.
  3. Read the week and year made, the approximate date of that week and the age today.

The four digits at the end of the DOT code on the tire's sidewall: two for the week and two for the year.

One click answer

Your answer will appear here.

Fill in the form and your answer appears here as you type.

Assumptions

  • This page gives no age at which a tire should be replaced. For that, use the tire maker's guidance, your vehicle's owner's manual or a tire professional.
  • The week date is approximate (weeks counted from 1 January).
  • A code that is not a real week (01 to 53) or that falls after today is refused.

Printed from oneclickanswers.com. Results are estimates based on what was entered; see the assumptions above.

How it works

The last four digits of the DOT code are the week and the year the tire was made. In 2423, 24 is the week and 23 is the year 2023.

The week is placed by counting 7-day weeks from 1 January: week 24 starts 23 weeks after 1 January 2023, which is 11 June 2023. That date is approximate, because makers do not publish one calendar for it.

The age is the number of whole months from that date to today, shown as years and months: 11 June 2023 to 4 October 2026 is 3 years and 3 months.

Assumptions

  • This page gives no age at which a tire should be replaced. For that, use the tire maker's guidance, your vehicle's owner's manual or a tire professional.
  • The week date is approximate (weeks counted from 1 January).
  • A code that is not a real week (01 to 53) or that falls after today is refused.

Example

Input: 2423, on 4 October 2026

Result: Made in week 24 of 2023, about 3 years and 3 months old. Week 24 of 2023 starts about Sunday, June 11, 2023.

Questions

Where is the date code on a tire?

It is the last four digits of the DOT code printed on the sidewall. The first two digits are the week and the last two are the year.

What does 2423 mean?

Week 24 of 2023: the tire was made in about the middle of June 2023.

When should a tire be replaced?

This page does not say. It reports the age only. Use the tire maker's guidance, your owner's manual or a tire professional.

Last reviewed 2026-10-04.

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