How many chickens would balance your weight?
An average broiler chicken weighs about 2 kg at slaughter. A 75 kg adult equals roughly 37 chickens on the scale.
Why modern chickens are so big
The chickens you eat today are virtually unrecognisable from their wild ancestors. Red junglefowl, the species all domestic chickens descend from, weighs about 700 g and takes a year to reach adult weight. A modern broiler chicken weighs 2 kg at six weeks old — and is genetically engineered (through selective breeding rather than direct DNA editing) to put on weight so fast it can\'t support itself by adult size. Heritage breeds like the Brahma or Jersey Giant grow more slowly and reach larger ultimate sizes, but commercial agriculture optimised aggressively for speed.
| Type | Weight | Use |
|---|---|---|
| Red junglefowl (wild ancestor) | 0.5–0.9 kg | Original species |
| Cornish Cross broiler | 2.0–2.5 kg at 6 weeks | Commercial meat |
| Leghorn laying hen | 1.5–2.0 kg | Egg production |
| Rhode Island Red | 2.5–3.5 kg | Dual purpose |
| Brahma | 4.5–5.5 kg | Heritage / show |
| Jersey Giant | 5.5–6.0 kg | Heritage meat |
Chickens by the numbers
- 25 billion live chickens exist at any given moment — over three per human on Earth.
- 70 billion are slaughtered each year globally for meat. The global chicken population has tripled in living memory.
- The combined biomass of all chickens is roughly 50 million tonnes — more than the biomass of all wild birds combined.
- The world\'s oldest chicken on record (Matilda, a Red Pyle) lived to 16 years old.
Chicken vs human weight
The average human weighs roughly the same as 37 chickens. A herd of 37 chickens following you down the street would create an audio experience you don\'t soon forget. (For the record, "rooster" is the term for a male chicken; "hen" for a female; "chick" for a young bird; and "broiler" for a young bird raised specifically for meat.)
Try other animal weight calculators
See your weight in cats, corgis, elephants, or find your animal weight twin.