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Enter your sheep weight in kilograms, pick the climate from cool to hot, and pick dry or lactating. The calculator starts from 0.06 litres per kilogram, which puts an 80 kg ewe at 4.8 litres in mild weather, inside the published gestating ewe range of 4.0 to 6.5 litres, then scales for heat and for lactation. It returns daily water in litres and gallons plus a weekly total. Worked example: an 80 kg dry ewe in mild weather needs 4.8 litres a day, which is 1.27 gallons and 33.6 litres a week. A second example: the same ewe lactating in hot weather needs 10.37 litres a day, which is 2.74 gallons and 72.59 litres a week. These are planning estimates, not veterinary advice.
Sheep water intake is usually quoted per head per day rather than per kilogram, but the two agree: an 80 kg gestating ewe averages about 5.25 litres a day, which is about 0.066 litres per kilogram. This sheep water intake calculator uses 0.06 litres per kilogram as its base, then multiplies by a climate factor and by 1.6 for lactating ewes. Worked example: an 80 kg dry ewe in mild weather needs 4.8 litres a day. A second example: the same ewe lactating in hot weather needs 10.37 litres a day, close to the published lactating ewe typical figure of 10 litres. Use this chart for scale: a 40 kg lamb needs about 2.4 litres, an 80 kg ewe about 4.8 litres, and a 100 kg ram about 6.0 litres, before climate and lactation adjustments.
Different classes drink very different amounts. Published stock tables give weaners 2 to 4 litres per head per day, adult dry sheep on grassland 2 to 6 litres, adult dry sheep on saltbush 4 to 12 litres, ewes with lambs 4 to 10 litres, and rams 4 to 10 litres. Extension tables agree: a feeder lamb of 27 to 50 kg averages 4.4 litres, a gestating meat ewe of 80 kg averages 5.25 litres, and a lactating meat ewe with lambs averages 10 litres. For a mixed flock, calculate each class separately and add the totals, rather than applying one average to the whole flock.
Sheep drink about 40 percent more in summer than in winter, and up to 80 percent more in extreme hot conditions. This calculator uses a 1.35 climate factor for hot weather, with cool weather at 0.9. Salty diets push intake higher still: sheep drink 50 to 80 percent more when their water contains over 2000 parts per million of total dissolved salts, and saltbush grazing can double drinking compared with grassland. In a heatwave, check water points twice daily, because sheep will crowd a single trough and weaker animals can miss out.
Grazing sheep get much of their water from feed, especially on lush pasture, so in cool seasons they may drink surprisingly little from troughs without being short of water. Dry feed reverses this: ewes on dry feed need the full trough figure, and high salt or high protein diets raise drinking further. Water quality matters: salinity up to about 7800 microsiemens per centimetre is generally tolerated, but water at 4000 to 10000 parts per million of dissolved salts can cause problems until animals adjust, and evaporation can concentrate salts in dams over summer. Test water if sheep show reluctance to drink, and allow about 25 percent extra for dam evaporation losses when planning storage.
Sheep dehydration signs include dullness, dry mouth, sunken eyes, dark urine, hard droppings, reduced feed intake, and a drop in milk yield for lactating ewes. Restricting water for more than 12 hours can cut milk yield, so lactating ewes must never be short. For flock planning, multiply the per head figure by head count: 1000 ewes at 6 litres per head need 6000 litres a day, plus rams and lambs on top. Size dams, tanks and troughs for the summer peak, keep a reserve for evaporation and fouling, and remember that a water budget is just as critical as a feed budget.
About 3 to 12 litres per head per day, depending on class, feed and weather. An 80 kg dry ewe in mild weather needs about 4.8 litres, and a lactating ewe about 10 litres.
About 4.8 litres a day when dry in mild weather, and about 10.37 litres a day when lactating in hot weather, using the 0.06 litres per kilogram base.
About 9.0 to 10.5 litres a day for a lactating meat ewe with lambs, averaging about 10 litres. This calculator applies a 1.6 factor for lactation.
Yes. Sheep drink about 40 percent more in summer than in winter, and up to 80 percent more in extreme heat. This calculator uses a 1.35 factor for hot weather.
About 4 to 12 litres per head per day, roughly double the grassland figure, because salty feed needs extra water to flush the salt load from the body.
Weaners drink about 2 to 4 litres per head per day, and a feeder lamb of 27 to 50 kg averages about 4.4 litres a day in published extension tables.
Dullness, dry mouth, sunken eyes, dark urine, hard droppings, reduced feed intake, and lower milk yield in ewes. A full day of barely drinking needs prompt attention.