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Parrot Weight Calculator

PetSmall Pets, Birds and Fish
Earlier weighing
Weight in grams —
Against species range
—
Typical adult range
—
Share of range midpoint
—
Change since earlier weighing
—

Weigh your parrot in grams at the same time each morning, before food, and compare the number with its species band. A cockatiel at 92 g sits inside the usual 80–100 g range at 102% of the midpoint. A drop of 10% or more between weighings matters more than any single reading.

About this tool

Birds hide illness well, and a falling weight is often the first sign anyone notices. This calculator takes a reading from a gram scale or a kitchen scale in ounces or pounds, converts it to grams, and places it against the typical adult range for the species you pick: budgerigar, cockatiel, conures, greys, Amazons, eclectus, cockatoos, macaws and others. It also reports the weight as a share of the range midpoint and, if you add an earlier weighing, the percentage change between the two. The ranges are broad population figures; an individual bird with a large frame can be healthy above them, so your own bird's baseline over weeks is the better reference.

How to use it

  1. Pick the species

    Choose the closest match from the list of 15 common pet parrots.

  2. Enter the weight and unit

    Type the scale reading and pick g, oz or lb in the unit box inside the field.

  3. Add an earlier weighing

    Switch Earlier weighing to Compare and enter the previous reading in the same unit to see the percentage change.

  4. Read the result

    The grams figure, the range status and the working appear as you type.

Examples

African grey weighed at 1 lb

Species
Congo African grey
Current weight
1
Unit
lb
Earlier weighing
No comparison

Result Weight in grams: 453.6
Against species range: Within typical range
Typical adult range: 400–600 g
Share of range midpoint: 90.7%
Change since earlier weighing: No earlier weighing

  1. Weight in grams = 1 lb × 453.59237 = 453.6 g
  2. Congo African grey typical adult range: 400–600 g (midpoint 500 g)
  3. Share of midpoint = 453.6 ÷ 500 × 100 = 90.7%

A kitchen scale reading of exactly one pound is 453.6 g, comfortably inside the 400–600 g band usually quoted for Congo greys.

Cockatiel, 100 g last month, 90 g today

Species
Cockatiel
Current weight
90
Unit
g
Earlier weighing
Compare
Earlier weight (same unit)
100

Result Weight in grams: 90
Against species range: Within typical range
Typical adult range: 80–100 g
Share of range midpoint: 100%
Change since earlier weighing: -10.0%

  1. Cockatiel typical adult range: 80–100 g (midpoint 90 g)
  2. Share of midpoint = 90 ÷ 90 × 100 = 100%
  3. Change = (90 − 100) ÷ 100 × 100 = -10%

Still inside the 80–100 g band, but a 10% drop in a month is worth a call to an avian vet.

How it is calculated

grams = reading × unit factor; share = grams ÷ ((low + high) ÷ 2) × 100; change = (now − before) ÷ before × 100

unit factor
1 for g, 28.349523125 for oz, 453.59237 for lb (NIST)
low, high
typical adult weight range for the species, in grams
now, before
current and earlier weighing in grams

The reading is converted to grams with the exact NIST factors for the avoirdupois ounce and pound. The status compares grams with the species band: below the low end, inside it, or above the high end. The midpoint share shows how far a bird sits from the centre of the band, and the change figure uses the earlier weighing as its base, so a fall from 100 g to 90 g is −10%.

When not to use it

  • Chicks and juveniles still growing follow their own curves, not adult ranges.
  • Hybrids and uncommon subspecies may not match any listed band.
  • A sick bird needs an avian vet, not a range check.

Common mistakes

  • Weighing after a meal or a drink, which can add several grams to a small bird.
  • Mixing units between the two weighings in the comparison.
  • Judging a bird by one reading instead of the trend across weeks.

Frequently asked questions

How often should a parrot be weighed?

Many avian vets suggest weekly weighings for a healthy adult and daily ones during illness, moulting or breeding. Use the same scale, at the same time of day, ideally in the morning before the first meal, so the readings are comparable.

What kind of scale works for a parrot?

A digital kitchen or postal scale that reads in 1 g steps is enough for most species. For budgies and parrotlets, where 3 g is about 10% of body weight, a scale with 0.1 g resolution is better. Put a perch or a small box on the scale and tare it first.

How much weight loss is a concern?

A loss of about 10% of body weight is widely treated as a reason to see an avian vet, and faster loss over days is more urgent than slow drift. The tool warns when the comparison shows a fall of 10% or more.

My bird is above the range. Is it overweight?

Not necessarily. Ranges are population figures and big-framed individuals sit above them. Look at the keel bone: if it is hard to feel under the breast muscle and fat rolls appear, the bird may be overweight. A vet can score body condition properly.

Why do the ranges differ between books and websites?

Different sources sample different populations, and many species have subspecies of different sizes. The bands here are typical figures for common pet lines, rounded to tidy numbers, and should be read as a guide rather than a diagnosis.

Does the conversion from ounces change the answer much?

No. The ounce and pound factors are exact by definition: 1 oz is 28.349523125 g and 1 lb is 453.59237 g. Small differences come only from the scale's own resolution, which is usually coarser in ounces.