---
title: "American alligator vs grizzly bear — size, weight and speed co"
description: "Grizzly bear is somewhat greater than American alligator on weight — about 1.2×. Compared on 4 measured properties, with the full range and a source for each."
url: https://atoneplace.net/vs/american-alligator-vs-grizzly-bear/
site: "At One Place"
---

# American alligator vs Grizzly bear

**American alligator vs grizzly bear: Grizzly bear is larger on weight**

Grizzly bear is somewhat greater than American alligator on weight — about 1.2×.

An American alligator and a grizzly bear can be compared on 4 measures. The figures below are typical adult or full-size values, with the larger of the two in bold.

## Side by side

*Larger value in bold. Ranges reflect genuine variation, not uncertainty.*

|  | American alligator | Grizzly bear |
| --- | --- | --- |
| Weight | 70–500 kg | 130–360 kg |
| Length | 2.6–4.6 m | 1.7–2.4 m |
| Typical lifespan | 35–70 yr | 20–35 yr |
| Bite force | 1,000–2,980 psi | 975 psi |

## What the numbers say

- Grizzly bear is somewhat greater than American alligator on weight — about 1.2×.
- American alligator is 1.7× grizzly bear on length.
- American alligator is 2× grizzly bear on typical lifespan.
- American alligator is 2.2× grizzly bear on bite force.

*Weight compared.*

- Grizzly bear: 130–360 kg
- American alligator: 70–500 kg

## American alligator

A broad-snouted crocodilian of the US Southeast, recovered from near-extinction to over a million animals.

## Grizzly bear

The inland North American brown bear, smaller than coastal populations because it eats less salmon.

> This is a comparison of published measurements, nothing more. It describes how two things differ on measures that have been recorded; it does not predict how they would fare against each other in any situation.

## Common questions

### Which is bigger, American alligator or grizzly bear?

Grizzly bear is somewhat greater than American alligator on weight — about 1.2×. Both figures are typical values; the full range for each is in the table above.

### How do American alligators and grizzly bears compare on length?

American alligator: 2.6–4.6 m. Grizzly bear: 1.7–2.4 m. American alligator is 1.7× grizzly bear on length.

### How do American alligators and grizzly bears compare on typical lifespan?

American alligator: 35–70 yr. Grizzly bear: 20–35 yr. American alligator is 2× grizzly bear on typical lifespan.

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## Sources

- Smithsonian National Museum of Natural History — Smithsonian Institution (https://naturalhistory.si.edu/)
- Typical range compiled from manufacturer specifications — At One Place (/about/)