What have my running shoes cost per kilometre?
Divide what you paid by how far you have run, and see what each kilometre actually cost.
Real maths • Your answers stay on your device
What you'll need
- What the shoes cost
- How far you have run in them
Why bother working this out
Comparing running shoes by purchase price alone is genuinely misleading, because a cheaper pair worn for 200 km and a pricier pair worn for 1,000 km have completely different actual costs per kilometre. Dividing price by distance run is the only way to put two pairs on the same footing.
Expressing the same figure as a cost per race distance is what makes it click. Race distances — parkrun, 10K, half marathon, marathon — are standard, official lengths, so restating the same division against them turns an abstract rate into a number tied to something concrete you might actually run.
Your number appears here.
Answer the questions and press Show me my weird number. Everything is worked out on your own device.
Making sense of the number
Cost per kilometre only ever falls as you run further in the same pair, since the purchase price is fixed while the distance dividing it keeps growing. In the worked example above, $220 shoes sit at $0.37/km after 600 km; the same shoes after 1,200 km would be down to about $0.18/km — the number is most meaningful compared across your own shoes' distance, not as a one-off verdict at a single point in their life.
More on this in how to read an estimate without mistaking it for a measurement.
How we work this out
A single division, then a set of race distances so the number means something. If you run in miles, the headline follows your unit and the race distances are still shown in their official metric lengths.
Step by step
- Convert your distance to kilometres if needed.
- Divide the purchase price by the distance to get cost per kilometre.
- Multiply by 5, 10, 21.0975 and 42.195 for the standard race distances.
Worked example
Say:$220 shoes, 600 km run in them. Cost per kilometre is $220 ÷ 600 ≈ $0.37. Over a 42.195 km marathon distance, that comes to roughly $15.47 of shoe per marathon run.
What this does not claim
- We do not assume a replacement mileage. There is no universal number of kilometres a running shoe should last, and inventing one would change your result for no good reason.
- Price is what you paid. Resale value, warranty replacements and the second pair you bought on sale are not included.
- Half marathon and marathon distances are the official World Athletics lengths.
For how figures like these get chosen in general, seehow a lifetime estimate is actually builtand how we choose assumptions and sources.
Sources
This calculator uses no external reference values. Every number comes from your own answers, plus standard calendar and unit arithmetic — a mean year of 365.2425 days, and twelve months in a year.