Donaldson R F Cockatiel Age Calculator
Enter your cockatiel’s age (or date of birth) to see roughly how far through a reported lifespan it is. We do not convert to human years. Nothing leaves your browser.
More pets: all pet age calculators.
How this works
Quick answer
The two sources we read disagree: 10 to 14 years (VCA) against up to 25 with proper care (PetMD). A cockatiel of 10 is somewhere between 40% and 100% of the way through.
How the result is calculated, step by step
- We turn your cockatiel’s date of birth or age into years and months.
- We divide the age by the two figures we read: 25 years (PetMD, ‘up to’) and 10 years (the low end of VCA’s range).
- The result is a share of a typical lifespan, not a life stage.
Example: a cockatiel of 10 years. 10 ÷ 25 is 40% and 10 ÷ 10 is 100%, so it is roughly 40% to 100% of the way through a reported lifespan. The range is wide because the sources are.
Where the numbers come from, and what they assume
- The two sources differ by a factor of two. VCA’s figure is a range with a stated maximum; PetMD’s is an ‘up to’ figure with proper care.
Why we do not show human years. We do not show human years or life stages for cockatiels. The sources we read gave no conversion and no stage ages, and their lifespans differ widely.
How much you can trust each result
| Result | Confidence label | Based on |
|---|---|---|
| Human-equivalent age | Not shown | Not shown: see the explanation above. |
| Life stage | Not shown | We found no life-stage ages for cockatiels in two independent sources, so we show none. |
| Share of a typical lifespan | Popular rule of thumb — rough idea only | Typical lifespan: 10 to 14 years (maximum 24) or up to 25 with proper care. 10 to 14 years (maximum 24 years). (VCA Animal Hospitals: Cockatiels, general information) Up to 25 years with proper care. (PetMD: Cockatiel care sheet) |
- Scientific formula: a formula fitted to research data that we read in the original paper.
- Peer-reviewed scientific article: a peer-reviewed article in the scientific or veterinary literature that we read, but not an official guideline issued by a veterinary or animal-welfare body.
- Veterinary life-stage guideline: stages or lifespans published by a veterinary body or animal-welfare organisation whose page we read.
- Popular rule of thumb — rough idea only: a rule that appears only in secondary sources (care websites, articles). We read at least two, show the result as a range, list what we read below, and found no primary scientific basis for it.
Limits
- Diet, housing, exercise and vet care all matter. Ask a vet who treats birds about anything that worries you.
- Breed or type, size, health, genetics and environment all change how an animal ages. None of them is in the calculation.
- The maximum age this page accepts (40 years) is only a sanity check, not a claim about how long cockatiels live.
Sources and date checked
Everything below was opened and read on 27 September 2026. If a page has changed since, the numbers here may be out of date.
- VCA Animal Hospitals: Cockatiels, general information — what we read: Lifespan ‘10 to 14 years (maximum 24 years)’. (checked 27 September 2026)
- PetMD: Cockatiel care sheet — what we read: ‘Up to 25 years with proper care’. No life stages. (checked 27 September 2026)
Other pets: dog, cat, horse, rabbit, guinea pig, hamster, budgerigar, cockatiel, tortoise and turtle. For dates and people, try the Age Calculator.