The Physics of . . . Pocket Change

What we really need to solve the problem of loose and useless lucre is a new coin

By Alan Burdick
Oct 1, 2003 5:00 AMJun 28, 2023 7:12 PM

Newsletter

Sign up for our email newsletter for the latest science news
 

Americans have had it with loose change. It bursts pockets, fills piggy banks, spills from the little change bowl by the front door. By one estimate, $10.5 billion in coins just sits around in people's homes gathering dust. What with fancy purses and expensive pocketbooks, "power wrappers," and automated coin sifters, it's fair to say that a decent chunk of that do-nothing change is spent simply trying to organize it.

Loose pocket change is a heavy, hidden burden. One dollar in various denominations can weigh more than three leather wallets. Photograph by Nick Veasey

Jeffrey Shallit has a suggestion. A mathematician at the University of Waterloo in Ontario, Shallit recently analyzed the average handful of change and has devised a clever way to reduce its size. Getting rid of the 1-cent coin, a plot advocated by numerous antipennyists, would certainly help, he says. But Shallit's own scheme for reducing loose change involves the creation of an entirely new coin. What the United States needs, he says, is an 18-cent piece.

0 free articles left
Want More? Get unlimited access for as low as $1.99/month

Already a subscriber?

Register or Log In

0 free articlesSubscribe
Discover Magazine Logo
Want more?

Keep reading for as low as $1.99!

Subscribe

Already a subscriber?

Register or Log In

Stay Curious

Sign up for our weekly newsletter and unlock one more article for free.

 

View our Privacy Policy


Want more?
Keep reading for as low as $1.99!


Log In or Register

Already a subscriber?
Find my Subscription

More From Discover
Stay Curious
Join
Our List

Sign up for our weekly science updates.

 
Subscribe
To The Magazine

Save up to 40% off the cover price when you subscribe to Discover magazine.

Copyright © 2025 LabX Media Group