For modern U.S. quarters like you find in change, none. They don't contain any silver - they're made of copper and nickel.
For quarters dated 1964 and earlier, each one contains 5.625 gm of pure silver, almost exactly 1/5 of an ounce. So 5 old quarters contain a total of 1 oz of silver.
Almost exactly 5 1/2 uncirculated quarters. 5.53 to be exact. circulated coins will be slightly lighter due to metal loss although this is generally minuscule.
The quarters, half-dollar and dime are struck in 90 percent silver, generally referred to as "coin silver."The silver proof quarters weigh 0.180845 oz - multiply that by the current silver price to get the value for that coin.
14oz
15 Lbs is 1200 quarters (or $300). 1 quarter weighs .20 oz (assuming these are all new quarters) If there are 16 oz in 1 pound, then there are 240 oz in 15 pounds. 240 oz divided by .20 oz is 1200. 1200 quarters is $300.
it takes nearly 3 - 90% silver half dollars to make an oz of silver IF IF IF the coins are not worn down.. the least worn are the franklin and Kennedy halves the most worn are the walking liberties halves.. it can take up to 6 of them[WL's] if they are really.really worn to make an oz of silver! be careful as Midas Resources,Ted Anderson,and Alex jones claim 2 half dollars equal 1 oz of silver, which is not correct.
7.15 oz.
US quarters weigh 6.25 grams and of that there is 0.18084 oz of silver.
Four 40% Eisenhower dollars= a little more than 1 & 1/4 oz of silver.
four
Almost exactly 5 1/2 uncirculated quarters. 5.53 to be exact. circulated coins will be slightly lighter due to metal loss although this is generally minuscule.
5
The quarters, half-dollar and dime are struck in 90 percent silver, generally referred to as "coin silver."The silver proof quarters weigh 0.180845 oz - multiply that by the current silver price to get the value for that coin.
12
There's many out there but the most popular are probably the 1-oz American Silver Eagle or 1-oz Canadian Maple..I believe those have a $5 face value though but I may be mistaken. Of course, 90% junk silver quarters are great too but you need to have 4 of those to make a $1 face value.
14oz
15 Lbs is 1200 quarters (or $300). 1 quarter weighs .20 oz (assuming these are all new quarters) If there are 16 oz in 1 pound, then there are 240 oz in 15 pounds. 240 oz divided by .20 oz is 1200. 1200 quarters is $300.
Silver half dollars have about 0.362 Troy oz. of silver in them, so 3 of them would be 1.086 Troy oz.