A gallon of pure maple syrup weighs approximately 11 to 11.5 pounds (5 to 5.2 kg).

Pure maple syrup is denser than water, so a gallon weighs more than 8.34 lbs (water's weight). The exact weight varies slightly based on sugar concentration (typically 66-67% sugar content) and temperature. Commercial grading standards ensure consistency, but minor fluctuations can occur due to processing or storage conditions.

Why Maple Syrup Weighs More Than Water

• Sugar density: Maple syrup contains ~66% sugar, making it 1.3-1.4x heavier than water per gallon.
• Temperature impact: Cooler syrup is thicker and may weigh slightly more; warming reduces viscosity but not significantly.
• Grade differences: Darker syrups (e.g., Grade A Dark) have marginally higher sugar content, adding minimal weight.

Weight Comparison: Maple Syrup vs. Other Liquids (Per Gallon)

How to Measure Maple Syrup Accurately

1. Use a kitchen scale: Place the container on the scale, tare to zero, then pour syrup to measure precise weight.
2. Check temperature: Syrup at 60°F (15°C) is densest; warmer syrup may read slightly lighter.
3. Account for containers: Glass jugs add ~1-2 lbs; plastic jugs add ~0.5 lbs. Subtract container weight for net syrup weight.
4. Convert volumes: 1 gallon = 128 fl oz = 3.8 liters. Use these for recipe scaling.

Common Maple Syrup Quantities and Weights

• 1 quart (32 fl oz): ~2.75-3 lbs (1.2-1.4 kg)
• 1 pint (16 fl oz): ~1.4-1.5 lbs (0.6-0.7 kg)
• 1 cup (8 fl oz): ~0.7-0.8 lbs (0.3-0.4 kg)
• 1 tablespoon: ~0.04-0.05 lbs (18-22 g)

Factors That Can Alter Weight

• Moisture content: Higher water content (e.g., early-season syrup) may reduce weight by ~5-10%.
• Additives: Commercial syrups with preservatives or thickeners may vary slightly.
• Processing method: Reverse-osmosis syrup (water removed) is denser than traditionally boiled syrup.
• Storage time: Crystallization over time can increase perceived weight due to sugar settling.