Tire Size Calculator FREE
Only calculator that will let you compare metric tire (tyre) sizes with Imperial (US) tire sizes, automatically converts mm into inches.
Includes three modes-Comparison between two tire (tyre) sizes, either can be metric or imperial.-Convert Metric to Imperial or Imperial to Metric-Suggest a list of tire (tire) sizes that match your original car tire size.
Compares tire (tyre) circumference (rolling distance), Height, Sidewall Height/profile, Ride Height Gain, Thread Width, Rim Diameter, Suitable Rim Width, Revolutions per Km, Speed Comparison at 100kmph and 60mph and displays the result in mm, inches, and percentages.
To maintain accurate reading of speedometer and proper function of vehicle, one must always use tyres (tires) that have overall circumference within 3% that of factory fitted tyres (tires). If you are currently in the market for new tyres (tires), this is a must have calculator. It is very important to know what tyre (tire) size, or range of tyre (tire) sizes are suitable for your vehicle. Always follow your car manufacturer recommendations.
Category : Tools
Reviews (30)
I thought it can convert imperial to metric motorcycle sizes. Instead it does something else. Interesting but not what I need. Also in motorcycle tyre with there is no 170mm which is standard for new BMW GS motorcycles. When comparing imperial sizes let say 4.00-18 you can't select "-" as a value for height.
Car and truck tire size is perfect, but for recommendations i wish they would fix the motorcycle tire sizes choice, bikes have 180 and 190 in tire size which we cannot select.
This is exactly what I was looking for. Buying tires can be pricey, so knowing whether or not a certain tire will work is great when you find a deal.
Apart from a single typo, this app is extremely accurate, and very useful. Thanks for this fantastic resource. 👍
Not calculated accurately cause increased in tyre width effect the circumference of the wheel, as circumference are affected only by increasing in rim size and tyre profile only. Tyre width are 90 degrees horizontal to tyre profile, so this cannot effect the circumference, I think some calculations are wrong
Exactly what I was looking for. Suggests alternate tire sizes for vehicles. Immensely helpful in my line of work.
Very helpful my truck did not have the original wheels and tires now I know what sizes will work and keep me within legal speed limits, Recommend this app.
Very Nice App. Very helpful for those also who doesn't have any basic idea of tires sizes and all.... Thank you.
This app is so good helps me with my job everyday only thing it needs in my eyes is the max min rim widths that the tyre can legally go on otherwise it's the best app in its class
Fast and easy to use. Useful features. No garbage.
I use this daily in our business to upsize or calculate alternate sizes..perfect👍
The one stop app to getting the correct tire size you need. Many thanks to the Devs.
What this app needs to be complete is a front/rear profile representation like Fresh Rocket's Tire Size Calculator app has.
It's very helpful for me to compare tyre size. Recommended.
Please make it easyer to use only the tires that actually exist !!! Thanks
When you change rim size on this app it changes over all tire size
Nice to have when looking for alternate tire sizes.
fantastic and accurate yet simple and lucid
Cool ap and actually useful. Rare in a world full of lik hok fakebook
I work in the tire business and this is an excellent tool to have at your disposal
How do you say that there isn't a size 170 motorcycle tire? Of course there is it's on my bike. I am looking at it. 170/80 15 fix it.
The best free tire calculator! hands down!
This is the best tire size calculator I've used so far
Very useful and very easy to use
very nice application & user friendly..💛
This app is great, just what I was looking for. Very easy to use.
I would like to ask: in tires suggest, what is -0.5% and 0.5% stand for?
It's not working
Great app i use it all the time
16.5 would be awesome. I imagine it could be difucult since 16.5 measurenents are like "16.5x9.5" only 2 numbers. Ultimately tho this is one of the best apps out there i been using it for years it was literally the first app i ever downloaded and still in my opinion one of the most usefull along with the tide chart app. Get that 16.5 in there and ill pay for pro