Tire Size Calculator
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Tire size calculator: compare specs, speedometer error and plus size options
- Downloads
- 204+
- on Google Play
- Price
- Free
- No in-app purchases
- Updated
- Sep 26
- 2026 · v1.2.4
Screenshots
About Tire Size Calculator
▶ Compare two tire sizes at a glance. Enter both specs and see the difference in diameter, circumference, sidewall and ride height, with a to-scale overlay so the size change is obvious.
▶ Check your speedometer. See how a new tire shifts your real speed versus the reading, plus an odometer-error percentage — the numbers that matter after an upsize.
▶ Find plus sizes. Enter a target and get alternate sizes within a few percent of the original diameter, grouped by rim so you can plan a clean plus-one or plus-two.
▶ Decode the markings. Load-index and speed-rating tables turn the numbers on the sidewall into kg and km/h, with P, LT and XL explained.
▶ Save your vehicles and share a result card. Works offline, no account needed.
Results are for reference only. Fitment and clearance depend on your vehicle — always confirm with your owner's manual or a tire professional.
▶ Check your speedometer. See how a new tire shifts your real speed versus the reading, plus an odometer-error percentage — the numbers that matter after an upsize.
▶ Find plus sizes. Enter a target and get alternate sizes within a few percent of the original diameter, grouped by rim so you can plan a clean plus-one or plus-two.
▶ Decode the markings. Load-index and speed-rating tables turn the numbers on the sidewall into kg and km/h, with P, LT and XL explained.
▶ Save your vehicles and share a result card. Works offline, no account needed.
Results are for reference only. Fitment and clearance depend on your vehicle — always confirm with your owner's manual or a tire professional.
What’s new
Version 1.2.4 · Updated September 26, 2026
New Wheel tab: rim width and ET offset for the old and new wheel, outer and inner edge change, backspacing and a to-scale drawing. Tap a suggested size to compare it. Round mph steps in inch mode. Privacy policy and privacy choices in the menu. Cleaner icons and haptics.
Alternatives to Tire Size Calculator
Looking for apps like Tire Size Calculator? Here are 6 similar Android apps on Google Play. All of them are free to download.
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PD Meter: Pupillary Distance
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| App | Rating | Price | Installs | Last updated | Compare |
|---|---|---|---|---|---|
| Tire Size Calculator | – | Free | 100+ | Sep 26, 2026 | |
| PD Meter: Pupillary Distance | – | Free | 5,000+ | Oct 1, 2026 | Compare |
| Meteor Shower Calendar Tonight | – | Free | 500+ | Aug 29, 2026 | Compare |
| TV Antenna Pointer & Towers | – | Free | 5,000+ | Oct 7, 2026 | Compare |
| Speaker & Subwoofer Sound Test | – | Free | 100+ | Sep 25, 2026 | Compare |
| Long Exposure Slow Shutter Cam | – | Free | 100+ | Aug 16, 2026 | Compare |
| Roof Pitch Gauge: Angle & x:12 | – | Free | 10+ | – | Compare |
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