Livestock Water Requirement Calculator & Daily Water for the Herd
Waters cattle
Get your animals' daily drinking-water needs — by species, milk yield and weather — with herd totals and a storage-tank recommendation so stock never runs short.
Hot weather sharply raises water intake — provide clean water free-choice at all times.
Each dairy cow needs about 84 litres a day in warm (25–32°c) weather (more with higher milk yield). Your 10 animals drink 840 L/day — about 25,200 L a month.
Next: size storage for at least a 2-day reserve (~1,700 L) so a pump failure or supply break doesn't leave stock short. Keep troughs clean and shaded; dirty or hot water cuts intake — and intake drives milk yield and growth.
Thumb-rule intakes — actual needs vary with diet (dry feed raises it), body size, lactation and humidity.
Livestock water — key facts
- Dairy cow
- ≈ 40 L + 3 L per L milk
- Buffalo
- ≈ 45 L + 3.5 L per L milk
- Goat / sheep
- 4–5 L/day
- Pig / horse
- ≈ 18 / 40 L/day
- Poultry
- ≈ 0.2–0.25 L/bird/day
- Hot weather
- +40–50% intake
- Storage
- ≥ 2-day reserve
- Privacy
- Runs in your browser; nothing uploaded
Water is the cheapest input — and the most limiting
Of everything you give an animal, water has the biggest, fastest effect on production — and it's the easiest to get wrong. A milking cow needs its maintenance water plus about three litres for every litre of milk, because milk is mostly water; restrict it and yield drops the same day. This tool adds the maintenance need, the milk-driven need and a heat factor for the weather to give a realistic per-animal and whole-herd figure.
From the daily total it also sizes storage — at least a two-day reserve so a pump breakdown or supply cut doesn't leave stock thirsty. The golden rule is simple: clean, cool water available free-choice at all times. Dry rations and hot weather push needs up, so plan generously, keep troughs clean and shaded, and make sure every animal can reach water easily. Pair this with the Livestock Feed tool to plan the full daily ration.
Plan daily water
Know exactly how much your herd drinks per day, adjusted for milk and heat.
Size storage
Get a tank recommendation with a safe reserve against supply failures.
Protect production
Ensure enough water so milk yield and growth aren't quietly limited.
Any species
Cattle, buffalo, goats, sheep, pigs, horses and poultry all covered.
Frequently Asked Questions
How much water does a dairy cow drink per day?+
A milking cow needs roughly its maintenance water (about 40 litres) plus around 3 litres for every litre of milk — so a cow giving 10 litres of milk drinks about 70 litres a day in mild weather, and more in heat. This tool computes it for your animal, yield and climate.
How much water do different animals need?+
Rough daily figures in mild weather: dairy cow 60–80 L, buffalo 65–90 L, dry cow/bullock ~40 L, calf ~15 L, goat/sheep 4–5 L, pig ~18 L, horse ~40 L, and poultry about 0.2–0.25 L per bird. Hot weather can raise these by 40–50%.
Why does milk yield raise water needs?+
Milk is nearly 87% water, and producing it demands a lot of drinking water — about 3 litres per litre of cow milk (more for buffalo). High yielders therefore need much more water, and restricting water directly cuts milk, so always provide it free-choice.
How does hot weather affect water intake?+
Heat sharply increases drinking — animals lose water cooling themselves, so intake can rise 40–50% above mild-weather levels in very hot conditions. The tool applies a heat factor (cool ×1.0, warm ×1.2, hot ×1.4) so your estimate reflects the season.
How big a water tank do I need?+
Size storage for at least a two-day reserve so a pump or supply failure doesn't leave stock short. The tool multiplies the herd's daily use by two and rounds up — for a herd drinking 700 L/day that's about a 1,400 L tank. Larger buffers are wise in remote or hot areas.
Should animals have water all the time?+
Yes — clean drinking water should be available free-choice at all times. Animals drink in many small bouts, especially after feeding and milking, and any restriction cuts feed intake, milk and growth. Rationing water is one of the most costly mistakes in livestock keeping.
Does feed type change water needs?+
Yes — dry feed (hay, concentrate, dry season grazing) raises drinking-water needs, while lush green fodder and silage supply some water and lower it. Salt and high-protein diets also increase intake. The figures here are general; adjust upward on dry rations.
How much water for poultry?+
Layers drink about 0.2–0.25 litres per bird per day and broilers a little less on average, roughly double their feed intake by weight — and much more in heat. For 100 layers that's around 25 litres a day; the tool scales it to your flock.
Why is clean, cool water important?+
Dirty, warm or salty water cuts intake, and lower intake means less milk, slower growth and heat-stress risk. Keep troughs clean and shaded, refresh water regularly, and site drinkers so every animal can reach them easily.
Are these figures exact for my animals?+
They're sound thumb-rule estimates. Actual needs vary with body size, breed, lactation stage, diet, water quality and humidity, so treat the result as a planning guide and always offer more than the minimum.