How Big, Fast and Strong Is a Komodo Dragon?

Key Takeaways

Komodo dragons reach about 3 m long, the largest of any living lizard.

Typical wild adults weigh 70-90 kg, with a verified maximum near 166 kg.

They can sprint roughly 20 km/h in short bursts to ambush prey.

Their kill strategy relies on venom and slicing teeth, not crushing bite force.

Wild lifespan is around 30 years; some in care have lived into their fifties.

The short answer

A Komodo dragon is the largest living lizard on Earth, reaching about 3 metres (10 feet) in length, weighing up to 166 kilograms at the documented extreme, sprinting around 20 km/h in short bursts, and bringing down prey with a venomous bite rather than brute force alone. Below, each of those numbers in context - and you can find the full profile in our Komodo dragon species guide.

How big is a Komodo dragon?

Wild adults commonly run between 2 and 3 metres long. The largest verified specimen measured roughly 3.13 metres. That makes the Komodo the undisputed heavyweight of the world's lizards - longer and far bulkier than any other living monitor.

How much does one weigh?

Most wild adults weigh around 70-90 kg. The heaviest reliably recorded individual reached about 166 kg, though figures that high are exceptional and often include a dragon that has just gorged on a large meal. A Komodo can swallow a remarkable share of its own body weight at a single sitting.

How fast is a Komodo dragon?

Despite their bulk, dragons can briefly run at around 20 km/h (about 13 mph). They are ambush specialists, not endurance runners - the speed is for the sudden lunge that catches a Timor deer or wild boar off guard, not a long chase.

How strong is its bite?

Here the dragon plays a clever game. Its skull is relatively lightly built, so it does not rely on crushing force the way a crocodile does. Instead, serrated backward-curving teeth open deep, ragged wounds, and venom glands in the lower jaw flood those wounds with toxins that stop blood from clotting and drop the victim's blood pressure. Prey that escapes the initial bite can still weaken and die, allowing the dragon - guided by its scent-tracking tongue - to follow and finish the job.

How long do they live?

Wild Komodo dragons are thought to live around 30 years, and individuals in managed care have reached their fifties.

Power, but not invincibility

For all its size and weaponry, the Komodo dragon is one of the most range-restricted large predators alive, confined to a few Indonesian islands and listed as Endangered. Being big has not made it safe. Readers who want to help can support habitat protection across the dragon's island range.

Read the full Komodo dragon wildlife guide for the facts, IUCN status and conservation context — or donate to WARN to help fund the local partners protecting this species.

Frequently Asked Questions

What is the biggest Komodo dragon ever recorded?

The largest reliably verified individual measured about 3.13 metres and weighed around 166 kg, though most wild adults are smaller, around 2-3 metres and 70-90 kg.

Can a human outrun a Komodo dragon?

Over distance, yes - dragons can sprint near 20 km/h only briefly. Their danger comes from ambush, so the safest approach is keeping well back and following trained guides, which is required throughout their range.

Is a Komodo dragon stronger than a crocodile?

A crocodile has a far more powerful crushing bite. The Komodo instead relies on slicing teeth and venom that causes bleeding and shock, so its lethality comes from chemistry and persistence rather than raw jaw strength.