Hydrogen Peroxide Dose for Dogs Calculator

Enter Calculation

Dog's Weight

Weight Unit Kilograms (kg) Pounds (lb)

Dose Rate (mL per kg) Standard guidance: 1-2 mL per kg of 3% hydrogen peroxide.

Results

Recommended 3% Hydrogen Peroxide Dose

10

mL (about 2 teaspoons)

Dose range (1–2 mL/kg)	10 – 20 mL
Weight used	10 kg
Approx. teaspoons	2 tsp

⚠️ Always call your veterinarian or a pet poison hotline first. Only induce vomiting if advised. Never give peroxide for caustic, petroleum, or sharp ingestions, or if the dog is unconscious. Use 3% hydrogen peroxide only — never higher concentrations. Do not repeat more than once.

What This Calculator Does

This tool estimates how much 3% hydrogen peroxide may be used to induce vomiting in a dog that has swallowed something potentially harmful. The standard veterinary guideline is roughly 1 to 2 mL of 3% hydrogen peroxide per kilogram of body weight, with a hard maximum of about 45 mL regardless of size. Enter your dog's weight, pick a dose rate, and the calculator returns the volume in millilitres and approximate teaspoons (1 tsp \(\approx\) 5 mL).

The calculator converts a dog's body weight into a 3% hydrogen peroxide dose.

Critical Safety Note

Always contact your veterinarian or a pet poison control hotline before inducing vomiting. Do NOT induce vomiting if your dog has swallowed a caustic substance (acids, alkalis, bleach), a petroleum product, a sharp object, or if the dog is unconscious, seizing, struggling to breathe, or already vomiting. Use only 3% hydrogen peroxide — stronger concentrations are dangerous. Never repeat more than once.

Always contact your veterinarian or poison control before inducing vomiting.

How to Use It

1. Enter the dog's weight and choose kilograms or pounds. 2. Choose a dose rate between 1 and 2 mL/kg (1 mL/kg is a common conservative starting point). 3. Read the recommended dose and the full 1–2 mL/kg range. Administer with a syringe (no needle), then walk the dog gently; vomiting usually occurs within 10–15 minutes.

The Formula Explained

Dose (mL) = Weight (kg) × rate, where rate is between 1 and 2 mL/kg, and the result is capped at 45 mL. If you enter pounds, the calculator first converts using kg = lb × 0.4536.

$$\text{Dose (mL)} = \min\left(\text{Weight (kg)} \times \text{Rate},\ 45\right)$$

$$\text{kg} = \text{lb} \times 0.4536$$

Dose scales with weight at 1–2 mL/kg but is capped at a 45 mL maximum.

Worked Example

A 10 kg dog at 1 mL/kg needs 10 mL of 3% hydrogen peroxide, which is about 2 teaspoons. The valid range (1–2 mL/kg) would be 10–20 mL. A 30 kg dog at 2 mL/kg would calculate to 60 mL, but this exceeds the 45 mL maximum, so the dose is capped at 45 mL.

$$10 \times 1 = 10\ \text{mL}$$

$$\min\left(30 \times 2,\ 45\right) = \min\left(60,\ 45\right) = 45\ \text{mL}$$

FAQ

Can I use 6% or food-grade peroxide? No. Only 3% hydrogen peroxide is appropriate; higher strengths can cause serious internal injury.

What if it doesn't work? Do not give a second dose without veterinary direction. Repeated doses can severely irritate the stomach.

Does this work for cats? No — hydrogen peroxide is not recommended for cats. This tool is for dogs only, and always under veterinary guidance.