---
title: "How much does a American lobster weigh?"
description: "An American lobster weighs 0.45–20 kg (0.992–44.1 lb). How that compares to other things, and where the number comes from."
url: https://atoneplace.net/weight/american-lobster/
site: "At One Place"
---

# How much does a American lobster weigh?

**Typical weight: 0.45–20 kg**

That is 0.992–44.1 lb.

The heaviest known crustacean; the record animal weighed 20 kg.

> Market lobsters are around 0.5-1 kg; the record, caught in 1977, weighed 20.1 kg.

## How that compares

*American lobster against things of a similar mass.*

- Platypus: 0.7–2.4 kg
- Electric kettle: 0.7–2.2 kg
- Mallard: 0.7–1.6 kg
- Trumpet: 0.9–1.4 kg
- Backpack: 0.25–2.6 kg
- American lobster: 0.45–20 kg
- Peregrine falcon: 0.33–1.5 kg
- Hair dryer: 0.35–1.1 kg

## More about an American lobster

- [How long does a American lobster last?](https://atoneplace.net/how-long/american-lobster/) — 30–100 yr

## Common questions

### How much does an American lobster weigh?

An American lobster weighs 0.45–20 kg (0.992–44.1 lb). Market lobsters are around 0.5-1 kg; the record, caught in 1977, weighed 20.1 kg.

## Related pages

- [How long does a American lobster last?](https://atoneplace.net/how-long/american-lobster/)
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- [How much does a walrus weigh?](https://atoneplace.net/weight/walrus/)
- [How much does a emperor penguin weigh?](https://atoneplace.net/weight/emperor-penguin/)

## Sources

- National Oceanic and Atmospheric Administration — NOAA (https://www.noaa.gov/) [Public domain (US Government)]