Small oil-rich seeds often ground and used as a fiber boost or egg substitute. One US cup weighs about 150g — about 1.2× heavier than a cup of all-purpose flour.
Flax seeds is preselected below — just enter an amount.
The most commonly searched gram amounts, converted to cups automatically.
| Grams | Cups |
|---|---|
| 25g | 0.17 cups |
| 50g | 0.33 cups≈ ⅓ cup |
| 75g | 0.50 cups≈ ½ cup |
| 100g | 0.67 cups≈ ⅔ cup |
| 125g | 0.83 cups |
| 150g | 1.00 cups≈ 1 cup |
| 200g | 1.33 cups≈ 1 ⅓ cups |
| 250g | 1.67 cups≈ 1 ⅔ cups |
| 300g | 2.00 cups≈ 2 cups |
| 500g | 3.33 cups≈ 3 ⅓ cups |
| 1000g | 6.67 cups≈ 6 ⅔ cups |
Small oil-rich seeds often ground and used as a fiber boost or egg substitute. It's also commonly labeled "linseed".
Flax seeds belongs to the Nuts & Seeds group on GramToCup, alongside other ingredients measured the same way in most kitchens. It shows up most often in egg substitute in baking, smoothies, baking mix-ins. Its density of 150g per US cup is what this calculator uses to convert between grams and cups automatically — no manual lookup required.
Flax seeds is made of individual pieces that never fit together perfectly, leaving small gaps of air between them. How tightly those pieces settle — whether shaken, pressed, or left loose — changes the weight of a "full" cup.
A cup of flax seeds is about 1.2× heavier than a cup of all-purpose flour (125g/cup), even though both fill the same 1-cup measuring cup.
Common mistake: Pressing or tapping the cup to fit more in, which compacts the pieces and adds extra weight beyond what the recipe expects.
Scoop or pour flax seeds into the measuring cup and gently shake to settle, then level the top. Don't press down — it settles naturally without packing.
When a recipe needs to be exact, weigh it on a kitchen scale instead of using a measuring cup at all — it removes packing and settling from the equation entirely.
Break up any large clumps before measuring flax seeds so the pieces settle naturally instead of leaving oversized air gaps.
100g of flax seeds is approximately 0.67 cups, based on a density of 150g per US cup.
1 US cup of flax seeds weighs about 150g. Use the calculator above to convert any other amount instantly.
Yes — "linseed" is another common name for flax seeds. The density and conversion values on this page apply either way.
Because cups measure volume and grams measure weight. A cup of flax seeds is about 1.2× heavier than a cup of all-purpose flour (125g/cup) because the two ingredients have different densities — see the density explanation above for why.
Scoop or pour flax seeds into the measuring cup and gently shake to settle, then level the top. Don't press down — it settles naturally without packing.
They're in the same category, but check the density first: Almonds (whole) weighs 143g per cup versus 150g for flax seeds. Substituting by weight (grams) keeps a recipe accurate; substituting cup-for-cup can change the result if the densities differ much.