How Much Is 1 Cup Of Maple Syrup In Grams? | Weight Guide

One cup of maple syrup typically weighs between 320 and 340 grams, though the exact amount depends on its density and sugar content.

You’re doubling a pancake recipe and the ingredients list calls for one cup of maple syrup, but your kitchen scale only reads grams. Or maybe you’re trying to standardize a batch of granola and need the weight to stay consistent. Either way, the simple answer feels like it should be one number.

The reality is a little looser. Maple syrup’s weight per cup varies because its density isn’t fixed. The range most often cited by baking sources — roughly 320 to 340 grams per cup — is a practical starting point, though the specific number depends on the syrup’s sugar concentration.

What Determines The Weight Of A Cup Of Maple Syrup

Maple syrup is mostly sugar and water, and the ratio between them determines how heavy a given volume is. U.S. Grade A maple syrup must have a solids content — measured as Brix — between 66% and 68.9% by weight. That range is narrow, but it’s enough to shift the gram count per cup.

A syrup at 66% Brix is slightly less dense than one at 68.9% Brix. Over the volume of a full cup, that difference can account for roughly 10 to 20 grams of variation. The USDA grade a brix standards don’t give a direct cup-to-gram conversion, but they set the boundaries that every commercial syrup must hit.

Water has a density of 1 gram per milliliter. Maple syrup’s density is higher — typically around 1.37 grams per milliliter, though it can range from about 1.1 to 1.4 g/mL depending on the dissolved sugar. That means a cup of maple syrup (240 mL) will weigh noticeably more than a cup of water (which weighs 240 grams).

Why The Cup-To-Gram Range Matters For Bakers

If you’re measuring by volume and your recipe was developed by weight, using the wrong gram value can throw off the sugar-to-liquid ratio. Maple syrup contributes both sweetness and moisture, so a 20-gram swing per cup isn’t trivial in a small batch.

Most home recipes assume a cup weight somewhere in the middle of the range. Commercial bakeries and product developers tend to weigh their syrup rather than rely on a volume assumption, precisely because the density varies between brands and even between batches from the same producer.

Here’s how the common conversions stack up across popular baking references:

• 320 grams per cup: Cited by several recipe conversion sites and close to what you’d get from syrup near the lower end of the Brix range.
• 322 grams per cup: Nearly identical to the 320 figure — small rounding differences across sources.
• 340 grams per cup: A higher estimate that appears in some baking conversion charts, likely reflecting syrup at the upper Brix limit or a denser batch.
• 156 grams per half cup: Proportionally consistent with the 320-gram full-cup figure, useful when halving a recipe.
• 50 grams per quarter cup: A smaller-scale conversion from an industry source, fitting the same density range.

None of these are wrong — they’re just anchored to different syrup densities. If your recipe doesn’t specify a weight, starting at 320 grams per cup is a safe baseline, then adjust by feel for sweetness and texture.

How Official Standards Shape The Number

The legal framework for maple syrup density provides the real reason the range exists. State and federal regulations require that maple syrup fall within a specific Brix window — typically 66% to 68.9% at 68°F — before it can be sold as Grade A. Below 66% Brix, the syrup risks fermenting because there isn’t enough dissolved sugar to act as a natural preservative. Above 68.9% Brix, the sugar concentration may cause crystallization over time.

These boundaries create a natural spread in density. A syrup at 66% Brix and one at 68.9% Brix are both legal Grade A products, but they don’t weigh the same per cup. Maine’s maple syrup Brix standards codify a similar range, ensuring that the density stays within safe preservation limits without fixing an exact weight.

For the consumer, this means two bottles of Grade A maple syrup from different producers — or even different seasons from the same producer — may yield slightly different gram counts per cup. That’s normal and expected, not a quality concern.

How To Get The Most Accurate Weight At Home

If you need precision for a recipe, volume-based cup measures are not the most reliable tool for maple syrup. The syrup’s viscosity makes it prone to air pockets, and the meniscus at the top of the measuring cup can shift the actual volume by a few milliliters.

1. Use a kitchen scale. Pour syrup directly into a bowl on the scale, tare the scale between additions, and record the gram weight. This bypasses volume variability entirely.
2. If only volume is available, use the middle figure. Start with 320 grams per cup (240 mL) as your default. For most home cooking, the difference between 320 grams and 340 grams is unlikely to ruin a recipe, but it can shift texture in delicate baked goods.
3. Check the Brix if you have access to it. Commercial syrup sometimes lists its Brix on the label. At 66% Brix, expect a lighter cup. At 68.9%, expect a heavier one.

Consider the recipe’s role. If maple syrup is a minor ingredient — a tablespoon or two — the gram variation is negligible. If it’s a major component, like in a syrup-based glaze or a single-serve custard, the weight matters more.

How Maple Syrup Compares To Other Liquid Ingredients

A quick weight comparison helps put the maple syrup range into context against other common kitchen liquids. The differences are large enough that substituting one for another by volume instead of weight can change a recipe’s outcome.

Maple syrup is heavier than water and milk because of its dissolved sugar solids, but it can be slightly lighter or heavier than honey depending on the exact Brix. The takeaway for cooking is simple: weigh sticky sweeteners whenever possible, and if you must use volume, know that different syrups and syrups from different batches won’t always be interchangeable gram-for-gram.

The Bottom Line

One cup of maple syrup weighs between 320 and 340 grams, with 320 grams being the most common estimate used by baking resources. The variation comes from the legal Brix range of 66% to 68.9% — syrup at the high end of that range is denser and heavier per cup than syrup at the low end. For most recipes, the difference is small enough to ignore; for precision-sensitive baking, a scale is your best tool.

If you’re tracking sugar intake or adjusting a recipe for blood sugar management, a registered dietitian can help match maple syrup’s carbohydrate load — roughly 52 grams of sugar per quarter cup — to your specific daily targets, which is more reliable than guessing from volume alone.