Coincalc.com – The Coin Jar Calculator
Ever wonder how much that coin jar you’ve been keeping since third grade is really worth? Don’t have the patience to count it out for yourself? The Coin Jar Calculator is the web tool for you. Users enter in the basic details about the jar, and after some speedy calculations, the site gives a rough estimate of the value of money inside the jar.
Users are only required to enter in the weight of the jar, then grab a handful of coins and list how many pennies, dimes, quarters, and nickels are in that representative fistful. According to the comments, some users find the service eerily accurate, others way off.