Prorated Tire Warranty Calculator
Apply a prorated treadwear warranty schedule. Calculate the credit for unused miles and what you pay toward a replacement tire.
Apply a specified warranty schedule.
Prorated Tire Warranty Calculator: Tire Size Inputs
Compare two tire sizes here. Use the formulas and reference tables below for this tool's specific calculation.
How Prorated Tire Warranty Calculator Works?
The Prorated Tire Warranty Calculator works by multiplying the original tire price by the share of warranty miles not yet used. The tool uses 4 steps.
Enter warranty miles
Type the warranty, for example 60,000 mi (96,561 km).
Enter miles used
Type the miles on the tire at the claim, for example 40,000 mi.
Enter prices
Type the original price ($200) and today's replacement price ($220).
Read the credit
The calculator returns a 33.3% credit of $66.67 and $153.33 to pay for the replacement before fees.
Prorated Tire Warranty Calculator Formula
The Prorated Tire Warranty Calculator formula is Credit = Price_original × (Warranty miles − Miles used) ÷ Warranty miles.
U = (M_w − M_used) ÷ M_wC = P_orig × UPay = P_new − C + fees- M_w
- Warranty miles
- M_used
- Miles at claim
- P_orig, P_new
- Original price and current replacement price
Worked example
A $200 tire with a 60,000 mi warranty wears out at 50,000 mi. The credit is 200 × 10,000 ÷ 60,000 = $33.33. A $220 replacement costs $186.67 before mounting and tax.
Prorated Tire Warranty Calculator Conversion Table
The Prorated Tire Warranty Calculator conversion table applies a 60,000 mi proration schedule at 6 claim points.
| Miles used | Unused share | Credit | Pay on a $220 replacement |
|---|---|---|---|
| 10,000 mi (16,093 km) | 83.3% | $166.67 | $53.33 |
| 20,000 mi (32,187 km) | 66.7% | $133.33 | $86.67 |
| 30,000 mi (48,280 km) | 50.0% | $100.00 | $120.00 |
| 40,000 mi (64,374 km) | 33.3% | $66.67 | $153.33 |
| 50,000 mi (80,467 km) | 16.7% | $33.33 | $186.67 |
| 55,000 mi (88,514 km) | 8.3% | $16.67 | $203.33 |
What is Prorated Tire Warranty Calculator?
A Prorated Tire Warranty Calculator is a tool that computes the credit a treadwear warranty gives toward a replacement tire. Credit shrinks in proportion to the miles used.
Some warranties prorate by tread depth instead of miles. The calculator accepts tread-based schedules by entering usable 32nds instead of miles.
Credit applies to the tire only. Mounting, balancing, disposal and tax remain payable.
What are the uses of Prorated Tire Warranty Calculator?
There are 4 main uses of the Prorated Tire Warranty Calculator, including claim value checks and claim timing.
Claim value checks
Know the credit before visiting a dealer.
Claim timing
Decide whether a claim is worth the visit.
Replacement budgeting
Plan the out-of-pocket cost of a claim.
Warranty value
Compare credits under 2 warranties.
Related Cost & Ownership Tools
View All 134 Subtools →Compare individual tire prices.
Calculate costs for a specified quantity.
Include mounting, balancing, and entered fees.
Compare costs after applicable rebates.
Use purchase cost and entered service life.
Compare distance-based ownership costs.