Water Medication Calculator & Dose the Drinking Water
Doses broilers
Dose medicine through the drinking water correctly — from animal numbers, body weight and the mg/kg dose, the product to add per day, the concentration and the course total.
Enter your flock & dose
Next: always follow the label dose and the meat/egg withdrawal period before sending animals or produce to market. Mix the medicine fresh each day in clean water, and make sure the birds actually drink it — many keepers withhold water for 1–2 hours first so the flock drinks the medicated water promptly.
Always follow the product label and meat/egg withdrawal times; this is a planning aid, not veterinary advice. Confirm the dose with your vet.
Water medication — key facts
- Drug/day
- animals × weight × dose
- Product/day
- drug ÷ strength
- Concentration
- drug ÷ day's water
- Dose by
- body weight, not by water
- Mix
- fresh every day
- Broiler water
- ≈ 1.5–2× feed intake
- Always
- observe the withdrawal period
- Privacy
- Runs in your browser; nothing uploaded
Get the dose right, every day of the course
Medicating through drinking water is the practical way to treat a whole flock, but it's easy to get wrong: dose by guesswork and you either under-treat (which fails and breeds resistance) or over-treat (which wastes drug and risks residues). The accurate method is to fix the dose by body weight — total drug = animals × weight × mg/kg — then spread that through the day's water so the concentration lands in the safe, palatable range.
This tool does exactly that, giving the product to add per day, the concentration in mg/L, and the totals for the whole course, for powders or liquids. Mix fresh daily, make the medicated water the only supply during dosing, complete the full course, and — critically — observe the label's meat/egg/milk withdrawal period. This is a dosing aid, not veterinary advice: always follow the product label and your vet. Pair it with the Poultry Brooding and Feed Conversion tools.
Dose accurately
Body-weight dosing delivers the right mg/kg, not a rough guess.
Check the strength
Concentration in mg/L to verify it's safe and palatable.
Buy for the course
Per-day and whole-course product totals to plan the treatment.
Powder or liquid
Works for water-soluble powders and liquid formulations.
Frequently Asked Questions
How do I calculate water medication dose?+
Work out the total active drug needed per day from body weight: total drug (mg) = number of animals × average weight (kg) × dose (mg/kg/day). Then divide by the product's strength (mg active per gram or ml) to get the product to add, and by the day's water to get the concentration. This tool does all three.
Should I dose by body weight or by water?+
By body weight is the accurate way — it delivers the right mg/kg regardless of how much the birds drink. The tool starts from total body weight to fix the drug dose, then spreads it through the day's expected water so the concentration is right. Always check it against the product label.
How much water do poultry and livestock drink?+
It varies with size, temperature and feed: broilers drink roughly 1.5–2× their feed intake (a fraction of a litre to ~0.3 L/bird/day as they grow), layers a bit more; a dairy cow 40–100+ L/day. Use a realistic per-animal intake for the season — birds drink much more in heat.
What is the concentration in mg/L?+
It's the active drug per litre of medicated water (total drug ÷ total daily water). It must fall within the range the product is safe and palatable at — too strong and animals refuse to drink; too weak and it's ineffective. The tool reports it so you can check it against the label.
How do I make sure the animals get the dose?+
Use only the medicated water as the day's supply (don't leave plain water available), mix it fresh each day, and for short-acting drugs consider withholding water briefly beforehand so animals drink the medicated water promptly. Clean lines and ensure all animals have access.
How much product do I need for the whole course?+
Multiply the daily product by the number of days in the course. The tool gives the per-day product and the course total (and the total water), so you can buy enough and plan the treatment from day one. Always complete the full course as prescribed.
Powder or liquid — does it matter?+
Only for the units: powders are dosed by their active strength in mg per gram, liquids in mg per millilitre. Set the product form and its strength and the tool returns the amount in grams or millilitres. Dissolve powders fully and use a stock solution with a dosing pump where available.
Is this veterinary advice?+
No — it's a dosing aid to help you measure correctly. Always follow the product label and your veterinarian's prescription for the drug, dose, duration and the meat/egg withdrawal period. Never exceed the label dose or under-dose (which breeds resistance).
What about the withdrawal period?+
Medicated animals must not be slaughtered, and their eggs/milk not sold, until the label's withdrawal period after the last dose has passed, so residues clear. This tool plans the dose; record your last treatment date and observe the withdrawal time strictly to keep produce safe and legal.
Can I use a stock solution and a dosing pump?+
Yes — make a concentrated stock solution and set the dosing pump (e.g. 1%) so the line delivers the right field concentration. Compute the daily product here, dissolve it into the stock tank volume your pump ratio implies, and verify the final in-line concentration matches the target mg/L.