Daily Water Need
120 gal/day
Per Animal
12.0 gal
Monthly
3,600 gal
Tank Size
250 gal
Daily Water Requirement
120 gal
12.0 gal per animal
Weekly
840 gal
Monthly
3,600 gal
Tank Size
250 gal
Monthly Cost
$18
Inputs
Result
Base rate: 1,200 / 100 × 1.0 = 12 gal/cow/day. No heat or lactation adjustments. Total: 12 × 10 = 120 gal/day. Tank: 120 × 2 = 240, rounded up to 250 gal.
Inputs
Result
Base: 1,400 / 100 × 1.5 = 21 gal. Hot: 21 × 1.3 = 27.3 gal. Lactation: 27.3 × 2.0 = 54.6 gal, capped at 35 gal/day. Total: 35 × 20 = 700 gal/day. Tank: 700 × 2 = 1,400 gal.
Inputs
Result
Base: midpoint of 5–10 = 7.5 gal. Hot: 7.5 × 1.5 = 11.25 gal. Heavy work: 11.25 × 1.5 = 16.875 gal. Total: 16.875 × 4 = 67.5, rounded to 68 gal/day. Tank: 68 × 2 = 136, rounded to 150 gal.
A beef cow drinks roughly 1 gallon per 100 lbs of body weight per day under mild conditions. A typical 1,200 lb cow needs about 12 gallons daily. Hot weather increases intake by 50%, and lactating cows need an additional 50% on top of that.
| Condition | 1,000 lb Cow | 1,200 lb Cow | 1,400 lb Cow |
|---|---|---|---|
| Mild, dry | 10 gal | 12 gal | 14 gal |
| Hot weather | 15 gal | 18 gal | 21 gal |
| Lactating (mild) | 15 gal | 18 gal | 21 gal |
| Lactating + hot | 22.5 gal | 27 gal | 31.5 gal |
Dairy cows need significantly more water than beef cattle — about 1.5 gallons per 100 lbs of body weight daily. A 1,400 lb dairy cow drinks 21 gallons at baseline. During peak lactation in hot weather, intake can reach 35 gallons per day.
| Production Stage | Mild Weather | Hot Weather |
|---|---|---|
| Dry cow (1,400 lbs) | 21 gal | 27 gal |
| Early lactation | 35 gal | 35 gal (capped) |
| Peak lactation | 35 gal | 35 gal (capped) |
An average horse drinks 5–10 gallons per day. Hot weather increases this by 50%, and horses doing heavy work need an additional 50%. A working horse in summer can drink 11–15 gallons daily. Always provide free-choice water access.
| Condition | Low Estimate | High Estimate | Average |
|---|---|---|---|
| Idle, mild weather | 5 gal | 10 gal | 7.5 gal |
| Idle, hot weather | 7.5 gal | 15 gal | 11.3 gal |
| Heavy work, mild | 7.5 gal | 15 gal | 11.3 gal |
| Heavy work, hot | 11.3 gal | 22.5 gal | 16.9 gal |
A good rule of thumb is to size your tank for at least 2 days of supply. For 10 beef cattle in mild weather, that means a 250-gallon tank minimum. Hot weather or lactation can double the requirement. Always round up to the nearest standard tank size.
| Herd Size (Beef) | Mild Daily | Hot Daily | Recommended Tank |
|---|---|---|---|
| 5 head | 60 gal | 90 gal | 200 gal |
| 10 head | 120 gal | 180 gal | 400 gal |
| 25 head | 300 gal | 450 gal | 1,000 gal |
| 50 head | 600 gal | 900 gal | 2,000 gal |
Heat stress dramatically increases water intake across all species. Cattle and horses drink 30–50% more in temperatures above 80°F. Pigs can double their water consumption in heat because they use water for wallowing to cool down since they cannot sweat.
| Species | Mild Intake | Hot Weather | Increase |
|---|---|---|---|
| Beef cow (1,200 lbs) | 12 gal | 18 gal | +50% |
| Dairy cow (1,400 lbs) | 21 gal | 27 gal | +30% |
| Horse | 7.5 gal | 11.3 gal | +50% |
| Pig | 4 gal | 8 gal | +100% |
| Sheep/Goat | 2 gal | 3 gal | +50% |
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Last Updated: Mar 9, 2026
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