A while ago I made an excel sheet to calculate feeding amounts. I made a web version to share so anyone can use it :) It's especially useful for puppies since they grow so quickly it's hard to keep up with how much to feed them on a weekly basis.
Just enter your dog's weight (either in pounds OR in kg, not both) and the kcal/cup of the food you are feeding.
In the green area it tells you how much to feed your dog (use the info. from one column only). I rounded it to the nearest 1/4 cup to simplify measuring but if you want a more accurate number it's below in the purple shaded area.
*NOTE* This assumes your dog has a normal activity level and is at a healthy weight. Feeding amounts should always be adjusted depending on your dog's needs and body condition (under/overweight if applicable). If your dog gets treats in addition to kibble subtract 1/4 cup from the daily total.
If your dog is outside of the "Medium" range (either very small or very large) then the "Alternate calculations" section (on the right) is likely to be more accurate.
This calculator is made using the Resting Energy Requirements (RER) formula for caloric needs in dogs. I confirmed with my vet this is the correct formula to be using to calculate feeding amounts.
Let me know if it's working properly!