How much maple sap does it take to make a gallon of maple syrup?

The answer depends on how sweet the maple sap is. The sweeter the sap, the less it takes to make one gallon of syrup. However, a good rule of thumb is 40:1. It takes approximately 40 gallons of maple sap to produce one gallon of maple syrup. 

Appears in: Maple Sugaring FAQs