Climbs
In some Cessna models you have a table where you get Time ,Fuel and Distance to climb to the altitude you aim for.
I used to fly some models where there aren't tables, what i was taught and used afterwards was Climb at Vy and usually it will give you an average of 500 fpm, then you can calculate the time , knowing your speed (Vy) you get your distance, i used to add 1 USG/hour to the maximum fuel burn figures you get from the tables to calculate the fuel burn on the climb, if you have already flown te model you can adjust the ROC if you know is well below or well above 500 fpm.
There is a rule of thumb which i can't remember for the fuel burn dependant on the Horsepower your engine is rated, aparently it works good , i have never used it though.