About CritterCalcs
CritterCalcs provides free, vet-reviewed calculator tools for dog and cat owners. Every tool is built on published veterinary science, tested against known values, and reviewed by a practising veterinarian before publication.
Who builds CritterCalcs
CritterCalcs is developed by Dan Dadovic, a Commercial Director and PhD candidate in IT Sciences based in Northumberland, UK. Dan applies rigorous data validation and testing methodologies from his academic research background to build precision calculator tools. His focus is on translating complex veterinary formulas and protocols into accessible, accurate tools that pet owners can use confidently.
Dan does not have a veterinary qualification. That is why every medical, toxicity, and health-related calculator on CritterCalcs undergoes clinical review by a qualified veterinarian before publication. The calculator development process prioritises accuracy and transparency: every formula cites its source, every dosage range references a published veterinary formulary, and every toxicity threshold traces back to established veterinary toxicology data.
Our veterinary reviewer
All medical, toxicity, and health-related content on CritterCalcs is reviewed by %%PARTNER_NAME%%, %%QUALIFICATION%%, a practising veterinarian. The clinical review process covers formula accuracy, dosage ranges, toxicity thresholds, contraindications, and the medical advice presented alongside calculator results.
Pages requiring veterinary review are flagged in our content system and cannot be published without clinical sign-off. This includes all medication dosage calculators, toxicity assessment tools, and health condition calculators. Nutrition and general-purpose tools are also reviewed, though they carry a lower clinical risk profile.
What CritterCalcs covers
CritterCalcs currently offers 12 free tools across two pillars: dogs and cats. The tools span medication dosing, toxicity assessment, nutrition and food portions, growth prediction, weight management, age conversion, pregnancy tracking, exercise guidance, vaccination scheduling, and body condition scoring.
Each calculator is built on a specific published veterinary source. Medication dosages reference Plumb's Veterinary Drug Handbook and the BSAVA Small Animal Formulary. Toxicity thresholds cite the Merck Veterinary Manual and ASPCA Animal Poison Control data. Breed databases reference AKC and Kennel Club breed standards, with growth curve data from WALTHAM Petcare Science Institute published studies.
What CritterCalcs cannot do
CritterCalcs is not a substitute for veterinary advice. The tools provide estimates and general guidance based on published veterinary data, but every animal is an individual. Factors such as breed variation, existing health conditions, concurrent medications, body composition, and metabolic differences mean that calculator outputs should always be discussed with your veterinarian.
Medication dosage calculators show standard dose ranges from published formularies. Your veterinarian may prescribe a different dose based on your pet's specific clinical situation. Toxicity calculators provide risk assessments based on published thresholds, but individual sensitivity varies. If your pet has ingested something potentially toxic, contact your veterinarian or emergency animal poison helpline directly — do not rely solely on a calculator result.
Growth predictions, nutrition calculations, and weight management guidance are based on breed-average data and published formulas. They provide useful starting points but require adjustment based on your pet's individual response, which your veterinarian can assess through regular check-ups.
How we build our tools
Every calculator follows a documented development process. The formula is identified from a published veterinary source, implemented in code, and tested against known values from that source. Worked examples are verified by running the actual inputs through the calculator and confirming all intermediate and final values match the narrative.
The breed database contains 200+ dog breeds and 50+ cat breeds, each with weight ranges, height ranges, life expectancy data, and activity baselines sourced from AKC, Kennel Club, CFA, and TICA breed standards. The medication database covers commonly prescribed drugs for both dogs and cats, with separate entries reflecting the significant metabolic differences between species.
For a detailed explanation of our editorial and development process, including how sources are selected and verified, see our methodology page.
Contact
For questions, corrections, or feedback about CritterCalcs, reach out through the feedback form on any page or email hello@crittercalcs.com. Corrections to medical or scientific content are prioritised and reviewed within 48 hours.
For data subject requests under GDPR, see our privacy policy for contact details and the process for exercising your rights.