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Tire Tread Wear Calculator

Estimate your tyre wear rate from two tread measurements or a known rate, then the distance and months left before the 2/32 in (1.6 mm) legal limit.

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Tire Tread Wear Calculator works straight from this page — free, instant, nothing to install. Its place is under Maintenance & tyres; Tire Pressure Temperature Guide and Tire Size Calculator answer the questions closest to this one.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What is Tire Tread Wear Calculator?

Estimate your tyre wear rate from two tread measurements or a known rate, then the distance and months left before the 2/32 in (1.6 mm) legal limit.

When would I actually use this?

Between garage visits: checking a tyre size is an allowed substitute, working out when the next service is due, and knowing what a wear threshold means.

What is the most common mistake?

Changing tyre size without keeping the rolling circumference. More than a couple of percent off and the speedometer, the odometer and the driver aids all read wrong.

How is Tire Tread Wear Calculator different from Tire Pressure Temperature Guide?

They sit next to each other but answer different questions: Tire Pressure Temperature Guide is the one to open when you need it to adjust cold tire pressure for a change in ambient temperature using the ideal-gas law. Pick whichever matches what you're starting from — both are free.

Is there a tool for the next step?

Tire Size Calculator is the closest one after this: Decode a tire code like 205/55 R16 into overall diameter, circumference and revolutions per kilometre.

Where do the figures come from?

Tyre dimensions follow the ISO marking, so the geometry is exact. Service intervals and legal wear limits are set by the manufacturer and by national law and differ between them.

Further reading

All guides →
ExplainerTyre Tread Depth: the Legal Limit Is Not the Safe LimitThe legal minimum exists to define an offence, not to describe a safe tyre. Tread does one job — getting water out of the contact patch — so its effect is near zero in the dry and decisive in the wet. Here is what the numbers say, and how to measure your own.ExplainerWhat Tire Pressure Should I Use? Placard vs Max PressureUse the vehicle placard pressure, not the number on the tire. Learn why the sidewall figure is a maximum, why pressure is set cold, and how temperature moves it.ExplainerHow to Read Tire Size: What 205/55 R16 Actually MeansThe numbers on your tire sidewall decode into width, aspect ratio and rim diameter. Learn to read 205/55 R16 and work out the real overall diameter.GuideTowing Capacity: the Limit That Stops You FirstThere is no single towing capacity. There are four or five separate limits, and the one that binds is rarely the tow rating on the brochure — it is usually the vehicle's own weight budget, quietly consumed by the people sitting in it.ExplainerStopping Distance Is Mostly Not BrakingTotal stopping distance is two distances added together, and they follow different laws — one grows with speed, the other with speed squared. That single fact explains why doubling your speed roughly triples the distance.ExplainerHeadlight Aim and How Far You Can Actually SeeA dipped beam is aimed downward by a fraction of a degree, so its reach on flat road is a single division. Do it and you find that at motorway speed the beam is shorter than the stopping distance — and that a loaded boot can throw the whole calculation away.