Not usable at all
Are you joking? The app requires entry of decimal point, but the given keyboard only allows a comma.
I bought a 10 speed
Gear Calculator worked fine with my 6 speed, now I’m waiting for it to support my 10 speed

Calculate a car's theoretical speed in any gear based on engine RPM, transmission, differential ratios, and tire size. It can also determine travel distance per engine revolution and estimate top speed for each gear. Supports both metric and imperial units.
1.3
January 3, 2026
- Updated for the newest devices. - Minor bugs fixed.
Gear Calculator Plus is used to calculate a car's theoretical speed for each gear based on engine RPM, transmission and differential ratios, and tire size. It can also calculate travel distance per engine revolution and estimate top speed for each gear.
Gear Calculator Plus is a paid app priced at $2.99. There are no in-app purchases or advertisements.
No, Gear Calculator Plus does not contain advertisements. It is a paid application.
Gear Calculator Plus is a universal app and supports both iPhone and iPad devices. It is compatible with iOS devices.
Gear Calculator Plus has an age rating of 4+, making it suitable for a wide range of users.
The latest version of Gear Calculator Plus is 1.3, which was last updated on January 3, 2026. This indicates a history of updates for the application.
Gear Calculator Plus can calculate speeds for overdrive gears, but it notes that these may be unreal speeds. This is because actual top speed in overdrive is often limited by the vehicle's power or aerodynamic drag.
Yes, Gear Calculator Plus offers a selection between Metric and Imperial units, allowing users to choose their preferred measurement system for calculations.