Maple Syrup Yield Calculator

The standard formula uses the Rule of 86: divide 86 by the sugar percentage of your sap to get the sap-to-syrup ratio. For example, Sugar Maple sap at 3.5% sugar gives a ratio of about 24.6:1 — meaning you need roughly 24.6 gallons of sap to make 1 gallon of syrup. This calculator applies that formula automatically based on your selected tree type.

Sugar Maple (Acer saccharum) produces the highest yield because its sap typically contains about 3.5% sugar — the highest of common tappable maples. Red Maple averages 2.5%, Silver Maple around 2.0%, and Box Elder roughly 1.5%. Higher sugar content means a lower sap-to-syrup ratio and more syrup per gallon of sap collected.

The ratio tells you how many gallons of raw sap you need to boil down to produce a single gallon of finished maple syrup. A ratio of 40:1 means 40 gallons of sap yields 1 gallon of syrup. The ratio varies because finished syrup must reach a sugar concentration of exactly 66%, regardless of the starting sugar level in the sap.

Sugar content in maple sap is largely determined by genetics and growing conditions. Sugar Maples have evolved to store more sucrose in their wood over winter, which transfers into the sap during the spring thaw. Other species like Silver Maple or Box Elder store less sugar, resulting in lower sugar concentrations and a higher volume of sap needed per gallon of syrup.

Yes — select 'Custom Sugar Content' from the tree type dropdown and enter your measured sugar percentage. Many producers use a refractometer or hydrometer to measure Brix (% sugar) directly from their sap, which gives a more accurate yield estimate than relying on species averages.

A healthy tapped Sugar Maple typically yields 10–20 gallons of sap per tap per season, translating to roughly 0.4–0.8 gallons of finished syrup per tap. Sap flow is highly dependent on weather — optimal conditions are freezing nights (below 32°F) followed by warm days (above 40°F), which usually occurs in late winter to early spring.

Common retail bottle sizes include 8 oz, 12 oz, and 16 oz for personal use, and 32 oz or 64 oz (quart and half-gallon) for larger batches. The USDA grades maple syrup in containers from 50 mL up to 5 gallons. Enter any jar size in fluid ounces into this calculator to see exactly how many containers your batch will fill.

The theoretical yield is determined entirely by sugar content — you're simply concentrating the sugar to 66% by evaporating water. However, practical yield can be slightly lower due to foam skimming, filter losses, and residue left in pans. As a rule of thumb, expect real-world yields to be about 5–10% lower than the calculated maximum.