The following table contains the actual gold contents of several modern US coins in Troy ounces.
Coin Type
$1 Liberty, Princess & Indian
1849-1889
$2.50 Liberty & Indian
1840-1907
$5.00 Liberty & Indian
1866-1929
$10.00 Liberty & Indian
1866-1933
$20.00 Liberty & St. Gaudens
1877-1933
AGW
.0483
.1209
.2419
.14792
.9675
Example calculation:
Assume the spot price of gold is $612.00 per troy ounce. You have 1 Indian $1.00, 3 Indian $2.50 , 4 Liberty $10.00, 5 Liberty $20.00 and 1 St Gaudens $20.00..