I don't have to worry about P and K, so I forget those, but I think the N ranges around 1.25 to 2 per cent.

I mulch mow and use coffee grounds on my lawn. I also sometimes hit the lawn with a high N fertilizer in late fall.

Where are you and what kind of grass do you have?

What works for me may not work for you.

Like bpgreen says, what kind of grass you have makes a big difference. I supplement my fertilizing regimen with some coffee grounds every month, but the coffee grounds alone don't provide enough N for my bermuda to be really happy :)

Here you go...

Here is a link that might be useful: NPK of stuff

I'm not an offianodo, so what the heck is "NPK" ?

I don't know what an offianodo is, but NPK stands for Nitrogen Phosphorous, Potassium (or Potash), the three elements that have their percentages listed on the sides of fertiliaer bags.