#### alvin l nunley

##### Site Supporter

there's a formula here for calculating air density.

I made a very simple dyno sheet for calculating HP. You put in your torque and rpm numbers and it calculates the horsepower. Also there's a chart. Shows horsepower and torque.

At the URL above, there is a formula for calculating air density that I can't make hide nor hair of. My math skills are limited. The formula is a graphic and will not transfer to here.

I have the air density calculation in cell A5. The barometric pressure number is in cell E3. The temperature is in cell G3. The temperature converted to Celsius is in cell E74.

If anybody can help me with this I sure would appreciate it.