Animal Vaccine Schedule Calculator
Keeping animals current on vaccinations requires tracking initial dose dates and calculating when boosters are due. This calculator takes the date of the first or most recent vaccination and computes the dates for subsequent doses based on the booster interval you specify. You can calculate up to three upcoming dose dates. Intervals for common vaccines: DA2PP puppy series every 21-28 days; annual boosters every 365 days; 3-year rabies every 1095 days; feline FVRCP initial series every 21-28 days. All vaccination schedules should be confirmed with your licensed veterinarian, as local laws, animal age, prior vaccine history, and risk factors influence the appropriate protocol.
Vaccine schedule formula
Dose n due date = Last dose date + (n x Booster interval days)
For puppy or kitten series: start at 6-8 weeks of age, add the interval for each subsequent dose until the series is complete (typically at 16-20 weeks for dogs). For annual boosters, enter the last vaccine date and an interval of 365 days to find the next due date.
AAHA and AAFP vaccination guidelines summary
- Puppies: DA2PP every 3-4 weeks from 6-8 weeks to 16 weeks of age; rabies at 12-16 weeks; boosters at 1 year then every 1-3 years.
- Kittens: FVRCP every 3-4 weeks from 6-8 weeks to 16 weeks; rabies at 12 weeks or older; FeLV for cats with outdoor access.
- Adult dogs: annual to triennial DA2PP (follow vaccine label DOI); rabies per state law (annual or triennial).
- Cattle: BRD complex pre-breeding or pre-weaning; clostridial (7-way) annually; leptospirosis annually.
- Horses: EEE/WEE/WNV/tetanus annually; rabies annually in endemic areas; influenza/herpesvirus based on risk.
Animal vaccine schedule calculator: frequently asked questions
When should puppies start their vaccination series?
AAHA guidelines recommend the core puppy vaccine series beginning at 6-8 weeks of age. The distemper/parvovirus combination (DA2PP) is given every 3-4 weeks until 16 weeks of age. Rabies is given at 12-16 weeks (per local law). After the initial series, boosters are given at 1 year and then every 1-3 years depending on the vaccine.
What are core vaccines for dogs?
AAHA defines core vaccines for dogs as: canine distemper virus, canine adenovirus-2 (hepatitis), canine parvovirus, and rabies. These are recommended for all dogs regardless of lifestyle. Non-core vaccines (Bordetella, leptospirosis, Lyme, canine influenza) are based on risk assessment by the veterinarian.
What are core vaccines for cats?
AAFP defines core vaccines for cats as: feline panleukopenia (FPV), feline herpesvirus-1 (FHV-1), feline calicivirus (FCV), and rabies. The FVRCP combination covers FPV, FHV-1, and FCV. Non-core vaccines include FeLV (for outdoor cats), FIV, and Chlamydophila felis.
What vaccines do cattle require?
Core cattle vaccines vary by production system and region. Common vaccines include IBR/BVD/PI3/BRSV (respiratory disease complex), leptospirosis, clostridial diseases (7-way blackleg), and brucellosis vaccination for heifers in some states. Consult your herd veterinarian for a herd health program.
How long does vaccine immunity last?
Duration of immunity varies by vaccine type, antigen, and species. Live attenuated vaccines (like MLV DA2PP) can provide 3 or more years of immunity after the initial series. Killed vaccines often require annual boosters. Rabies vaccines are legally required annually or every 3 years depending on state law and vaccine label.
Official sources
- American Animal Hospital Association (AAHA) Canine Vaccination Guidelines: AAHA Homepage.
- USDA Animal and Plant Health Inspection Service: APHIS Homepage.
Reviewed by the CalculatorHub team, edited by James Graham, 15 June 2026. See our methodology.