Cheat sheets for percentage horsepower

[unipres]

As I understand it, you get percentage horsepower on a PA-28 140 by looking at temperature, altitude and RPM and looking at some complicated graphs which isn't so convenient in the air.

Is there a handy shortcut for this, like a phone app or just some rough rule of thumb to follow to get the right throttle settings to match up with POH expected fuel burn etc...?

Just curious,

Thanks!

 

[Ray93J]

 

[steveR]

 

[steveR]

 

[Canuck]

 

[Canuck]

 

[Warriorgreg]

 

[TEG916]

 

[Aussiecat]

 

[cappy48]