🗓️ Flea & Tick Prevention Schedule Calculator

Enter your last treatment date and your product's re-application interval to see your upcoming due dates. This tool does not recommend or calculate dosing — always follow product label instructions.

Last treatment date

Re-application interval (days)

How the due dates are generated

The tool does date arithmetic and nothing else: it takes your last treatment date, adds the interval, and keeps adding it to give the next four due dates, numbered #2 to #5.

due #2 = last treatment + interval days
due #n = due #(n-1) + interval days     (four dates ahead)

With 1 April and a 30-day interval you get 1 May, 31 May, 30 June and 30 July. That drift is the point: a 30-day product is not a monthly one. Dates are in UTC, so a clock change cannot shift one.

Setting the interval

Take the number off the label. Spot-ons and most chews run 30 days, some oral products cover 12 weeks (84 days), and a collar quoted in months converts at about 240 days for 8 months.
The date box defaults to today - change it to the day you treated.
A blank interval falls back to 30 days silently, so check the badge reads what you meant.
Treat every pet in the house together. Fleas live in carpet as much as on the animal.

This schedules dates only - it does no dosing and holds no product data. Dose to your pet's current weight, on the label your vet gave you, and never split a dog pipette or put a dog product on a cat: permethrin, common in canine spot-ons, is seriously toxic to cats. An over-dose, the wrong species' product, or tremors, drooling or unsteadiness after treatment means phoning your vet or an animal poison line immediately. That is an emergency call, not something a calculator settles.

Frequently asked questions

When is my dog's next flea treatment due?

Interval days after the last dose. Enter 30 and you get four dates at once, which is easier to put in a calendar than remembering monthly.

What if I am late with a dose?

Give it when you notice and re-enter that date so the later ones shift with it. Do not double up to make good a missed dose; check the label, and ask your vet if a long gap left a tick season uncovered.

Do I need flea treatment in winter?

In heated homes fleas breed year round and ticks stay active in mild spells, so most vets advise treating right through the year at the same interval.