Dog Melatonin Dosage Calculator

Enter Calculation

Dog's Weight (kg)

Doses Per Day 1 time/day 2 times/day 3 times/day

Results

Melatonin Per Dose

3

mg per dose

Doses per day	3
Maximum daily total	9 mg

This is a general estimate only. Melatonin dosing for dogs varies by product, purpose, and individual health. Always consult your veterinarian before giving your dog any supplement, and avoid products containing xylitol, which is toxic to dogs.

What is the Dog Melatonin Dosage Calculator?

This tool gives a quick, weight-based estimate of how much melatonin a dog may be given per dose, along with the maximum daily total when given up to three times a day. Melatonin is sometimes used in dogs to help with anxiety, restlessness, sleep problems, and certain coat conditions. Dosing is approximate and should always be confirmed with a veterinarian, since the right amount depends on the product, the reason for use, and your dog's overall health.

How to use it

Enter your dog's weight in kilograms and choose how many times per day you plan to give a dose (1, 2, or 3). The calculator returns the milligrams per dose and the maximum daily total. Round to the nearest tablet size your product offers, and never give a product that contains xylitol — it is toxic to dogs.

The formula explained

A common rule of thumb groups dogs into weight bands: under 10 kg gets about 1 mg, 10 to under 25 kg gets about 3 mg, and 25 kg or more gets about 6 mg per dose. Melatonin can typically be given up to three times daily, so the maximum daily total is the per-dose amount multiplied by the number of doses.

$$\begin{gathered} \text{Max Daily Dose} = D \times \text{Doses/Day} \\[1.5em] \text{where}\quad D = \begin{cases} 1\,\text{mg}, & \text{Weight} < 10\,\text{kg} \\ 3\,\text{mg}, & 10 \le \text{Weight} < 25\,\text{kg} \\ 6\,\text{mg}, & \text{Weight} \ge 25\,\text{kg} \end{cases} \end{gathered}$$

Dose increases in steps: 1 mg under 10 kg, 3 mg for 10–25 kg, 6 mg over 25 kg.

Worked example

A 20 kg dog falls in the 10–25 kg band, so the dose is 3 mg. Given 3 times per day, the maximum daily total is \(3 \times 3 = 9\,\text{mg}\).

FAQ

Is melatonin safe for dogs? It is generally considered low-risk when dosed appropriately, but you should always check with your vet first, especially if your dog is pregnant, very young, or on other medication.

What products should I avoid? Avoid any melatonin gummy or tablet containing xylitol, chocolate, or other additives that are toxic to dogs.

How often can I give it? Many sources suggest up to three times a day, but the safe frequency depends on the product and your vet's advice.