Pet Calorie Calculator
Calculates daily caloric needs using the
Resting Energy Requirement (RER)
formula vets use:
RER = 70 × (body weight in kg)0.75.
That baseline gets multiplied by a life-stage factor for your
pet's actual maintenance calorie count.
Resting (RER)
895 cal
Daily target (MER)
1,074 cal
Formula: RER = 70 × (kg)0.75, MER = RER × life-stage factor (AAHA / WSAVA references). Real caloric needs vary by breed, body condition, and individual metabolism — adjust by ±15% based on Body Condition Score every 2-4 weeks.
Why food-bag charts overfeed
Most kibble feeding charts are calibrated for active, intact adult pets — but most U.S. pets are neutered indoor adults who need 20-30% fewer calories than the bag recommends. That explains the most common reason pets gain weight even when owners "feed the right amount."
Use this calculator's target, weigh portions for 2-4 weeks, then re-check Body Condition Score. If ribs are getting harder to feel: drop calories by 10%. If ribs are getting more prominent: increase by 10%. Repeat until stable at ideal BCS (4-5/9).
Continue reading
Get care for your pet in Florida, New York, or Virginia
$64.99 video visit with a licensed vet — same-day prescriptions and RexVetRx delivery in the states we serve.
Florida Online Vet
Licensed FL vet by video — $64.99 visits, RexVetRx delivery.
New York Online Vet
Licensed NY vet by video — for all 5 boroughs and upstate.
Virginia Online Vet
Licensed VA vet by video — Hampton Roads, NoVA, Richmond.
Family Plan — $120 one-time
4 visits + unlimited messaging for every pet in your home.
Browse more RexVet guides
Reviewed by Dr. Tiffany Delacruz, DVM — written for pet parents in Florida, New York, and Virginia.
Online Vet (Overview)
How an online vet visit works and what we treat.
Online Vet by City
FL, NY, and VA city-level vet care landers (89 cities).
Online Pet Prescriptions
Same-day Rx, delivery, and local-pharmacy pickup.
Pet Medications A–Z
Reference guide to common dog & cat medications.
Medication Dosage by Weight
Dosage guides for top drugs across 6 dog and 4 cat weight classes.
Breed Health Guides
Diagnosed conditions in 21 dog and 10 cat breeds.
Symptoms by Breed
Symptom guides for top dog breeds.
Symptoms by City
Dog & cat symptom guides for 24 top FL/NY/VA cities.
Symptoms by State
FL/NY/VA-specific symptom guides — climate triggers, common causes, telehealth fit.
Breeds by State
Top 10 dog breeds × FL/NY/VA — state-specific health risks and care plans.
Breeds by City
Hyper-local breed care guides for the top FL/NY/VA cities — same-day delivery in your ZIP.
Cat Breeds by City
Feline breed-specific care guides for FL/NY/VA cities — no carrier stress.
Conditions by State
Chronic condition management for FL/NY/VA pets — arthritis, allergies, kidney, diabetes, anxiety, and more.
Conditions by City
Hyper-local chronic condition guides for the top FL/NY/VA cities — same-day delivery in your ZIP.
2026 Pet Care Costs
What pet care actually costs, by procedure & state.
Pet Insurance Compared
Compare top plans alongside RexVet's flat pricing.
Online vs In-Person Cost
Real cost comparison for 10 common vet scenarios across FL/NY/VA.
Online Vet Near Me
How licensed-by-state telehealth actually works for FL, NY, VA pet parents.
Online Vet for Dogs
Licensed video visits, prescriptions, and chronic care for dogs.
Online Vet for Cats
Carrier-free feline care with licensed cat-savvy veterinarians.
Pet Health Library
Vet-authored guides on seasonal pet hazards, anxiety, and emergencies.
Pet Health Glossary
Plain-English definitions for 32 common vet medicine terms.
Pet Emergencies
Toxic foods, plants, heatstroke, fireworks anxiety — what to do right now + Pet Poison Helpline numbers.
Pet Emergencies by City
Immediate-action guides for poisoning, trauma, bloat, urinary blockage, breathing distress — FL/NY/VA cities.
Vet-Built Tools & Calculators
Dog age, pet weight, vaccine schedule, and calorie calculators — all vet-reviewed.
Online Vet by State
Where RexVet is licensed across all 50 U.S. states — served, roadmap, watchlist.