Gear Ratio Calculator
Calculate a top speed at a given engine speed at different transmission gearing. You may find it useful for calculating theoretical top speeds in mile and half mile racing such as the Texas Mile.
Inputs
- Engine RPM - engine RPM that you will be shifting at or your cruising engine speed
- Rear Diff Ratio - gearing ratio of your rear differential
- Tire Height (in.) - tire height in inches
| Engine RPM | Rear Diff Ratio | Tire Height (in.) |
|---|---|---|
| Gear Ratio | MPH | |
|---|---|---|
| 1st Gear | ||
| 2nd Gear | ||
| 3rd Gear | ||
| 4th Gear | ||
| 5th Gear | ||
| 6th Gear |