---
title: "grizzly bear vs koala — size, speed and bite force"
description: "grizzly bear and koala compared on mass, length, speed, bite force and lifespan — every measure side by side, with why the numbers cannot settle an encounter."
url: https://atoneplace.net/animal-vs/grizzly-bear-vs-koala/
site: "At One Place"
---

# grizzly bear vs koala

**grizzly bear vs koala: grizzly bear leads on 3 of 3 measures**

Measured comparison — not a prediction

The inland North American brown bear, smaller than coastal populations because it eats less salmon. A eucalyptus specialist that sleeps up to 20 hours a day because the diet yields so little energy. On the measurements below, grizzly bear leads on more of them — but they do not all point the same way, and the ones that disagree are the interesting part.

## The measurements

|  | grizzly bear | koala |
| --- | --- | --- |
| Mass | 130–360 kg | 4–15 kg |
| Length | 1.7–2.4 m | 0.6–0.85 m |
| Height | 0.9–1.1 m | — |
| Top speed | 56 km/h | — |
| Bite force | 975 psi | — |
| Lifespan | 20–35 yr | 10–20 yr |

## Where each one leads

- Mass: grizzly bear is 30× heavier.
- Length: grizzly bear is 2.7× longer.
- Lifespan: grizzly bear is 1.7× a longer life.

## What this does and does not tell you

These are measured averages with real ranges behind them, and every figure links to its own page. What they cannot do is settle an encounter. Outcomes between animals turn on circumstance — who initiates, whether either is hungry, defending young, injured or cornered, and what the terrain favours. Size and bite force are not decisive on their own, and most of these pairs never meet in the wild in any case, because their ranges do not overlap.

> Every figure here is an average with a substantial spread. Individual animals vary enormously — a large individual of the smaller species routinely exceeds a small individual of the larger one.

## Common questions

### Is a grizzly bear bigger than a koala?

grizzly bear is heavier — 130–360 kg against 4–15 kg.

### Who would win, a grizzly bear or a koala?

That is not something measurements can settle. The comparison above shows which animal leads on each measure, but an actual encounter depends on circumstance, motivation, health and terrain — and most pairs like this never meet in the wild.

## Related pages

- [How much does a grizzly bear weigh?](https://atoneplace.net/weight/grizzly-bear/)
- [How much does a koala weigh?](https://atoneplace.net/weight/koala/)
- [jaguar vs koala](https://atoneplace.net/animal-vs/jaguar-vs-koala/)
- [cheetah vs grizzly bear](https://atoneplace.net/animal-vs/cheetah-vs-grizzly-bear/)
- [cheetah vs koala](https://atoneplace.net/animal-vs/cheetah-vs-koala/)
- [cougar vs grizzly bear](https://atoneplace.net/animal-vs/cougar-vs-grizzly-bear/)
- [cougar vs koala](https://atoneplace.net/animal-vs/cougar-vs-koala/)
- [domestic cat vs grizzly bear](https://atoneplace.net/animal-vs/domestic-cat-vs-grizzly-bear/)
- [domestic cat vs koala](https://atoneplace.net/animal-vs/domestic-cat-vs-koala/)
- [grizzly bear vs lion](https://atoneplace.net/animal-vs/grizzly-bear-vs-lion/)
- [grizzly bear vs tiger](https://atoneplace.net/animal-vs/grizzly-bear-vs-tiger/)
- [grizzly bear vs leopard](https://atoneplace.net/animal-vs/grizzly-bear-vs-leopard/)
- [grizzly bear vs jaguar](https://atoneplace.net/animal-vs/grizzly-bear-vs-jaguar/)
- [grizzly bear vs snow leopard](https://atoneplace.net/animal-vs/grizzly-bear-vs-snow-leopard/)

## Sources

- Smithsonian National Museum of Natural History — Smithsonian Institution (https://naturalhistory.si.edu/)
- Wikidata — Wikimedia Foundation (https://www.wikidata.org/) [CC0 1.0]