This calculator gives a cost per 0.01 improvement in et on the quarter mile based on the cost for increasing the horsepower of the engine.
| variable | description |
| elapsed time | your current elapsed time on the 1/4 mile |
| weight | total weight of vehicle and driver, ready to run |
| additional hp | the additional flywheel horsepower from the engine |
| cost | the cost of the additional horsepower |
| new elapsed time | the new elapsed time on the 1/4 mile |
| difference | the difference in seconds between your current et and new et |
| cost per 0.01 et | the cost per 0.01 improvement in et on the 1/4 mile |
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