---
title: 'The World''s Heaviest Weight'
source: 'https://youtube.com/watch?v=3HQkVfZ4DNY'
video_id: '3HQkVfZ4DNY'
date: 2026-08-27
duration_sec: 60
channel: 'Veritasium'
---

# The World's Heaviest Weight

> Source: [The World's Heaviest Weight](https://youtube.com/watch?v=3HQkVfZ4DNY)

## Summary

This video showcases the world's heaviest weight, a machine with 20 calibrated 50,000 lb masses totaling over 50,000 lbs. It explains how these weights are used to calibrate force transducers in a lab upstairs, using a hydraulic ram and lifting frame to suspend the weights and measure force precisely.

### Key Points

- **Massive Weight System** [00:02] — The machine holds 20 calibrated 50,000 lb weights, totaling 50,036.27 lbs, which cumulatively exert 4.45 MN of force.
- **Calibration Purpose** [00:16] — The weights are used to calibrate four sensors (force transducers) located in the lab upstairs.
- **Operation Mechanism** [00:31] — A hydraulic ram in the attic raises a green lifting frame, which contacts the red loading frame and lifts the weights, allowing precise calibration of the force sensor.

## Transcript

50,036.27 lbs of mass. >> Approximately, yeah. There are 20 50 50,000 lb increments in this machine. 20 * 50 = 1 million lbs. Cumulatively, that's 4.45 MN. These are
calibrated. >> The machine works like this. Below ground are the 20 carefully calibrated masses. Their weight is used to calibrate four sensors, also called force transducers, in the lab upstairs.
compression head right here. >> Then a hydraulic ram in the attic starts to raise the green lifting frame. And once the force transducer contacts the red loading frame, well then it starts lifting the weights downstairs. And as
the lifting [music] frame continues to rise, more and more of the 50,000 lb weights become suspended by the force sensor. And since the weights create an from the force transducer [music] can be precisely calibrated.