How many calories does a neutered adult Tosa need?

At 149.9 lb, the verified feeding table lists 2652 kcal per day for a Tosa (resting energy 1658 kcal times a factor of 1.6).

How many calories does an intact adult Tosa need?

At 149.9 lb, the verified feeding table lists 2984 kcal per day for a Tosa (resting energy 1658 kcal times a factor of 1.8).

How many calories does a Tosa puppy under 4 months need?

At 149.9 lb, the verified feeding table lists 4973 kcal per day for a Tosa (resting energy 1658 kcal times a factor of 3).

How many calories does the weight-loss row list for a Tosa?

At 149.9 lb, the verified feeding table lists 1658 kcal per day for a Tosa (resting energy 1658 kcal times a factor of 1).

Feeding calculator

How much to feed a Tosa

A 150 lb Tosa is the starting weight on this calculator, taken from the verified adult range (100–200 lb).

Last reviewed November 1, 2026.

Tosa dog — Photo: Pleple2000 · CC BY-SA 3.0 · Wikimedia Commons

Daily portion

Dog food calculator: 2388 kcal; 6.82 cups · 819 g · 2 meals
Merck chart, Adult, neutered: 2653 kcal; Resting energy 1658 kcal × 1.6, before the calculator's activity and size adjustment.

Lifespan10–12 years

Weight100–200 lb

SizeGiant

GroupFoundation Stock Service

Resting energy at that weight is about 1658 kcal per day. The Merck neutered-adult factor of 1.6 puts maintenance near 2653 kcal before activity is added. The dog food calculator on this page uses that same resting-energy formula, then applies the activity and size adjustments from the main dog food calculator.

Reading the portions

Compared with other single-size giant breeds, that neutered-adult portion is 464 kcal higher than the 2189 kcal for an average giant breed at 116 lb.

Portions are a starting estimate. Tosa individuals can vary by body condition, neuter status, and how much they work. Adjust the bowl from what you see on the ribs, not from the table alone.

Feeding table from the verified weight chart

RER=70*kg^0.75; MER=RER*factor. Starting estimate only; individuals vary up to 50%; adjust by body condition

Tosa adults maintenance energy

Swipe sideways to read every column.

Weight	RER	Adult, neutered	Adult, intact	Puppy under 4 months	Puppy 4 months and older	Weight loss
99.9 lb (45.3 kg)	1222 kcal	1956 kcal	2200 kcal	3667 kcal	2445 kcal	1222 kcal
125 lb (56.7 kg)	1446 kcal	2314 kcal	2604 kcal	4339 kcal	2893 kcal	1446 kcal
149.9 lb (68 kg)Current weight	1658 kcal	2652 kcal	2984 kcal	4973 kcal	3315 kcal	1658 kcal
175 lb (79.4 kg)	1862 kcal	2979 kcal	3351 kcal	5586 kcal	3724 kcal	1862 kcal
200 lb (90.7 kg)	2057 kcal	3292 kcal	3703 kcal	6172 kcal	4115 kcal	2057 kcal