According to my County Extension bulletin, 1/2 pound of seed planted in 100 feet of row will yield 40 pounds of peas in the hull in 65 days. According to Wikipedia, a bushel will weigh approximately 25 pounds.

So...60 to 65 feet of row should yield one bushel of peas in the shell. From that, according to Wikipedia, you should get 8 quarts of shelled peas.

Thanks Donna, I am doing Square Foot Gardening and I have a bed that is 4 by 8 feet. The packet says plant seeds 3 inches apart, so since I don't have to abide by row spacing, I should be able to plant 16 - 8 foot rows spaced three inches apart. 16 times 3=48 inches or 4 feet. 16 8 foot rows is a total of 128 feet of peas. According to your numbers I should have plenty if I plant this entire bed full of peas. Let me know your thoughts anyone.

You bet. That is precisely how I plant too. You will be truly amazed at how much food you will harvest from those "small" beds. I can usually get 2 to 3 plantings in the summer too.

So once you pick the initial harvest of the peas, you just pull them up and plant again? Or do you keep them planted and wait for them to produce more peas?

They will usually continually to ripen for 2 to 3 weeks after the initial picking. After that their productiveness diminishes dramatically. I just pull the plants and put in more. (here in Mississippi). Butterbeans, on the other hand, produce all summer long.