Purina ONE Feeding Chart: How Much to Feed Your Dog

By the PawMathCalc Team · Updated October 26, 2026

Short answer: a 50 lb spayed or neutered adult dog needs about 1,164 kcal a day, which is about 3.0 cups of Purina ONE Chicken Rice (383 kcal per cup). Across the 15 Purina ONE dry foods below, calories range from 326 to 438 kcal per cup, so the right amount can differ by 34% between two bags of the same brand.

How much Purina ONE to feed: cups per day by weight

The table shows the daily amount for a healthy spayed or neutered adult dog at an ideal weight, for 10 lb, 30 lb, 50 lb, 70 lb. Split it into meals. Puppy foods show a dash: growing animals need 2 to 3 times more per pound, so use the calculator below with the right life stage.

Food	kcal per cup	kcal per kg	10 lb	30 lb	50 lb	70 lb
Chicken Rice	383	n/a	0.91	2.1	3.0	3.9
Digestive Health	384	n/a	0.91	2.1	3.0	3.9
Healthy Weight	326	n/a	1.1	2.4	3.6	4.6
Joint Health	356	n/a	0.98	2.2	3.3	4.2
Lamb Rice	369	n/a	0.94	2.2	3.2	4.1
Large Breed	358	n/a	0.97	2.2	3.3	4.2
Plus Whole Body Support Chicken	438	n/a	0.79	1.8	2.7	3.4
Small Bites Beef Rice	393	n/a	0.89	2.0	3.0	3.8
Small Breed Dog Food	426	n/a	0.82	1.9	2.7	3.5
True Instinct High Protein Real Beef Salmon	391	n/a	0.89	2.0	3.0	3.8
True Instinct High Protein Real Salmon Tuna	338	n/a	1.0	2.3	3.4	4.4
True Instinct High Protein Real Turkey Venison	365	n/a	0.95	2.2	3.2	4.1
Vibrant Maturity Senior	352	n/a	0.99	2.3	3.3	4.3
Healthy Puppy Food	374	n/a	-	-	-	-
Large Breed Puppy Food	353	n/a	-	-	-	-

Why the bag's chart may say something else

Feeding charts on bags are written for an average dog and often assume more activity than a typical indoor pet gets. Use the table as a starting point, weigh your dog every 2 to 4 weeks, and change the amount by about 10% if the weight moves. Intact, very active or working dogs need more; dogs that gain weight easily need less.

Calories per cup in this range

	kcal per cup
Median of 15 foods	369
Lowest: Purina ONE Healthy Weight	326
Highest: Purina ONE Plus Whole Body Support Chicken	438

Switching between two foods of the same brand can change calories a lot. Always recalculate the cups when you change food, and mix the new food in over 7 to 10 days.

Your own dog's weight, age and activity are in the calculator below: pick the food in the "find your food" box and it fills in the calories. All brands side by side: dog food calories per cup chart.

Sources: calorie content (metabolizable energy, as fed) copied from each manufacturer's own product page on October 26, 2026; each food name links to its page. Cups per day: RER = 70 × (kg)^0.75, × 1.6 for a spayed or neutered adult dog or × 1.2 for a spayed or neutered adult cat (WSAVA style energy factors). Formulas change: check the bag you buy.

Try the dog food calculator

Enter your own numbers below, or open the full dog food calculator with the formula and more examples.

This guide is general information, not veterinary advice. Your pet may differ: ask your vet. Terms

Frequently asked questions

How many cups of Purina ONE Chicken Rice should I feed my dog?

For a spayed or neutered adult at an ideal weight: about 0.91 cups a day at 10 lb, about 2.1 cups a day at 30 lb, about 3.0 cups a day at 50 lb, about 3.9 cups a day at 70 lb. Adjust by weight changes.

How many calories are in a cup of Purina ONE?

Between 326 and 438 kcal per cup across the 15 dry formulas listed, with a median of 369. Check the exact number on your bag.

Why does my dog need less than the bag says?

Bag charts are written for an average dog and often assume more activity. Spayed, neutered and indoor pets usually need less; weigh your dog and adjust.