If a vehicle has a known crank or wheel horsepower rating, is there a method that can reasonably estimate what the other horsepower value should be? If so, what is that method?

For example, if a vehicle has 300 wheel horsepower, is there a way to estimate its crank horsepower? And vice versa?

Note/Disclaimer: Accurately measuring horsepower on a car is difficult. A car on one dynamometer could produce one value, but on a different dynamometer, could produce a slightly different value. Different dynos can employ different means of measuring the power a car is producing. In addition, the weather and other atmospheric conditions can effect the amount of power a car is capable of delivering. For those interested in performance mods, the key metric to pay attention to is the amount of power gain across the RPM range of your vehicle.