Senior Dog Fit

Fish Oil for Dogs — How Many Capsules a Day?

Count capsules by combined EPA+DHA content, not total fish oil weight — a 1000 mg fish oil capsule might only contain 300 mg of actual EPA+DHA, with the rest other fatty acids and filler oil. Enter your dog's weight and the EPA and DHA amounts from your capsule's label below.

As an Amazon Associate we earn from qualifying purchases.

Both numbers are on the supplement facts panel, usually listed separately even though the front label shows one combined "fish oil" or "omega-3" number.

Where these numbers come from

The 100-220 mg/kg/day range is the practical floor and top of the published EPA+DHA dosage range for dogs (Roush et al. 2010, JAVMA; Fritsch et al. 2010, JVIM), checked 2026-08-15. See theomega-3 dose calculator for the full range and the safety ceiling. Split large capsule counts across meals rather than giving them all at once, and check with your vet before starting if your dog is on blood thinners or has a clotting disorder.

Related tools

A fish oil with EPA and DHA labeled per capsule

Softgels with EPA and DHA listed separately per capsule are what this calculator's inputs are asking for.

Fish oil softgels for dogs (EPA+DHA labeled) on Amazon