Quick answer
King Cobras typically weigh around about 9 kg, with length and height varying by sex and population. Size influences diet (Carnivore (mainly other snakes)), home range, and predator risk.
Key takeaway
King Cobras typically weigh around about 9 kg, with length and height varying by sex and population. Size influences diet (Carnivore (mainly other snakes)), home range, and predator risk.
Typical King Cobra size
Adults are often described at about 9 kg. Guides may list head-body length separately from tail; museum skins and live weights do not always match.
Males, females, and growth
Many species show sexual dimorphism. Juveniles reach adult mass over months to years; nutrition in Forests, mangroves, grasslands of Asia affects final size within genetic limits.
Why king cobra size matters
Body size shapes diet (Carnivore (mainly other snakes)), territory size, predator risk, and rough longevity patterns around ~20 years.
Measuring king cobras
Live weights are hard to take; researchers use morphometrics, cameras, or carcass data. Treat tourist guesses cautiously.
Behavior
The king cobra is intelligent and alert for a snake. When threatened it can raise up to a third of its body off the ground, spread its narrow hood, and emit a low growl-like hiss. Despite its fearsome reputation, it is generally shy and prefers to flee rather than confront people.
Diet and venom
Its scientific name, Ophiophagus, means "snake-eater," and the king cobra feeds mainly on other snakes, including venomous species. Its venom is a powerful neurotoxin delivered in large quantities; a single bite can deliver enough to be fatal to a human within hours if untreated.
Sources
King Cobra FAQs
How big is a king cobra?
King Cobras typically weigh around about 9 kg, with length and height varying by sex and population. Size influences diet (Carnivore (mainly other snakes)), home range, and predator risk.
What is the scientific name of the king cobra?
Ophiophagus hannah — used in research and conservation listings for king cobras.
What do king cobras eat?
King Cobras eat mainly other snakes, with seasonal and regional variation in Forests, mangroves, grasslands of Asia.
Where do king cobras live?
They are associated with Forests, mangroves, grasslands of Asia. Local presence depends on food, cover, and human land use.
What is the conservation status of king cobras?
Listed in our guides as Vulnerable. Check the IUCN Red List and national assessments for the latest formal category.