Water Medication Calculator & Dose the Drinking Water

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.

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.

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.

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.

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.

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.

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.

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).

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.

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.