Convert metric sizes like 275/60R20 to flotation such as 35x12.50R20 and back. See the exact equivalent and nearest catalog match — free, private, in-browser.
Enter values to see results
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Paste 275/60R20 and get the flotation-style equivalent (overall height × width × rim), or start from 35x12.50R20 and land on a metric designation. You do not have to reverse the diameter formula by hand on a parts-counter napkin before you shop either catalog.
The converter shows a direct equivalent from the math, then the nearest common catalog size — flotation from a fixed list, metric from standard widths and aspects, preferring the same rim diameter. Deltas for diameter and width versus that nearest size tell you how close the “rounding” really is.
Leave target on auto to flip to the other format, or force metric or flotation when you already know which catalog you are shopping. Same rim is preferred in the nearest-match score so you do not get a 17 when you typed a 20.
No account and no upload. The equivalent is geometry from the size code, not a live inventory check. Close the tab and the input is gone. Load index and speed rating still have to match the vehicle — this page does not convert those.
Metric (225/75R16) or flotation (31x10.50R15) both work. Copy width, aspect or overall height, and rim carefully.
Auto converts to the opposite format. Force a target when you are matching a specific catalog language.
Exact is the geometry. Nearest is a shoppable size from the built-in lists, with diameter and width deltas so you can see the compromise.
Conversion does not change load index or speed symbol. Check the sidewall and the placard before you buy.
Straight answers on privacy, limits, and how the workspace behaves.
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