Embed this calculator

The Tire Size Calculator is free to embed on a shop page, forum post or fitment write-up. It runs in the reader's browser. No accounts, no tracking of your visitors, and the same arithmetic as the tool on this site.

Copy the code

Paste this where you want the calculator to appear:

Copy code

Raise height if the compare toggle is open on a narrow screen. Keeping the link back to Tire Size Calculator is appreciated. It is how a new calculator earns a link.

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Who this is for

Shop and dealership sites add it to a fitment or financing page so shoppers can check diameter and speedometer difference without leaving. Forum moderators drop it into a sticky thread instead of re-explaining the same plus-sizing math every week. Fitment and off-road write-ups embed it next to a build log so readers can check a size before asking in the comments.

How it works

The iframe loads the same calculator that runs on this site's homepage: enter a stock size and a new size, and it returns the diameter difference, sidewall height, and the resulting speedometer error in plain percentages. Everything runs client-side in the reader's browser; the embed makes no calls back to Tire Size Calculator, so it adds no tracking and no dependency beyond the page loading.

Customizing it

The snippet above uses sensible defaults. To change size, adjust width and height on the iframe; the calculator itself reflows to fit the frame. If your page has a hard max-width, remove the inline style attribute and set the width in your own stylesheet instead.