How much to feed a Mastiff
A Mastiff usually weighs 120–230 lb. Here’s how much food that is per day, plus a calculator for your own food.
Typical weight
- males
- 160–230 lb
- females
- 120–170 lb
The AKC recommends scheduled meals rather than free-feeding, to avoid excessive weight gain.
Feeding chart by weight
Example: dry food with 380 kcal/cup, wet food with 30 kcal/oz.
| Weight | kcal/day | Dry | Wet |
|---|---|---|---|
| 120 lb | 2,244 | 5⅞ cups | 74.8 oz |
| 155 lb | 2,719 | 7⅛ cups | 90.6 oz |
| 195 lb | 3,230 | 8½ cups | 107.7 oz |
| 230 lb | 3,656 | 9⅝ cups | 121.9 oz |
For spayed or neutered dogs with normal activity. Intact dogs need about 12% more. The amounts only apply to food with exactly these calories; use the calculator below for yours.
Calculate with your food
How much does your dog weigh?
Decimals help, e.g. 22.5. No pet scale? Weigh yourself, then again holding your pet.
A starting point – the scale has the final say. If your dog is ill, talk to your vet.
Mastiff puppies
A Mastiff grows to about 175 lb. At 4 months, a puppy weighs about 73.6 lb on the growth curve in the FEDIAF guidelines and needs about 7¼ cups of dry food with 380 kcal/cup a day. For your puppy, calculate with its own age and weight.
Questions
How much should a Mastiff eat per day?
A Mastiff weighing 175 lb, spayed or neutered with normal activity, needs about 2,978 kcal a day. That’s about 7⅞ cups of dry food or 99.3 oz of wet food with the calories from the chart. Use the calculator above for your food.
How much does a Mastiff weigh?
According to AKC, adult males weigh 160–230 lb and females 120–170 lb.
My dog weighs more than this. Is that too much?
Not necessarily. The range is for typical dogs; large or muscular dogs can weigh more. Your dog’s shape tells you more than the number: you should feel the ribs and see a waist from above. If in doubt, ask your vet.
Sources
Last checked: October 2026