How Much Water Should a 120 lb Dog Drink a Day?

120 fl oz/day

120 lb dog · ≈ 15.0 cups · 3.55 litres per day

Daily water for a 120 lb dog

Situation	fl oz	Cups	Litres
Typical day	120	15.0	3.55
Low (wet food diet)	60	7.5	1.77
Hot day / active	180	22.5	5.32
Upper normal limit	240	30.0	7.10

Rule of thumb only; wet food supplies part of the water. Puppies need water available at all times.

How much water should a 120 lb dog drink?

About 120 fl oz (15.0 cups, 3.5 L) a day – the common rule of 1 oz per lb of body weight. Hot weather, exercise, nursing and dry food raise it.

When is drinking too much a concern?

Consistently more than about 240 oz (2 oz/lb) a day can signal diabetes, kidney disease or Cushing’s – see your vet.