Cooking converter · USDA gram weights

Whole Flaxseed Cups to Grams

Quick answer

1 cup of whole flaxseed weighs 168 g (5.93 oz). 1 tablespoon is 10.3 g and 1 teaspoon is 3.4 g.

1 cup: 168g; 5.93 oz
1 tablespoon: 10.3g
1 teaspoon: 3.4g
100 g: 0.6cups; of a US cup

Whole flaxseed is small, slippery and hard, and it pours like grain. Ground flaxseed is a different product that packs differently, so this page only applies to the seeds as they come in the packet.

Convert any amount of whole flaxseed

Starts at 1 cup of whole flaxseed in grams (168 g); change the units to go from grams back to cups.

Amount of whole flaxseedFromTo

1 cup of whole flaxseed is 168 grams

Cups: 1
Tablespoons: 16.31
Teaspoons: 49.41
Grams: 168
Ounces: 5.93

Whole Flaxseed: cups to grams and ounces

Cups of whole flaxseed in grams and ounces
Cups	Grams	Ounces
1/4 cup	42	1.48
1/3 cup	56	1.98
1/2 cup	84	2.96
2/3 cup	112	3.95
3/4 cup	126	4.44
1 cup	168	5.93
1 1/2 cups	252	8.89
2 cups	336	11.85
3 cups	504	17.78
4 cups	672	23.7

Tablespoons and teaspoons of whole flaxseed in grams and ounces
Spoons	Grams	Ounces
1/2 tablespoon	5.2	0.18
1 tablespoon	10.3	0.36
2 tablespoons	20.6	0.73
3 tablespoons	30.9	1.09
4 tablespoons	41.2	1.45
6 tablespoons	61.8	2.18
8 tablespoons	82.4	2.91
1/4 teaspoon	0.85	0.03
1/2 teaspoon	1.7	0.06
3/4 teaspoon	2.6	0.09
1 teaspoon	3.4	0.12
2 teaspoons	6.8	0.24
3 teaspoons	10.2	0.36

Whole Flaxseed: grams and ounces to cups

For a recipe written in grams or ounces, here is how much of a US cup each weight of whole flaxseed fills.

Grams of whole flaxseed in cups, tablespoons and ounces
Grams	Cups	Tablespoons	Ounces
25 g	0.15	2.43	0.88
50 g	0.3	4.85	1.76
100 g	0.6	9.71	3.53
125 g	0.74	12.14	4.41
150 g	0.89	14.56	5.29
200 g	1.19	19.42	7.05
250 g	1.49	24.27	8.82
300 g	1.79	29.13	10.58
400 g	2.38	38.83	14.11
500 g	2.98	48.54	17.64

Ounces of whole flaxseed in grams, cups and tablespoons
Ounces (weight)	Grams	Cups	Tablespoons
1 oz	28.3	0.17	2.75
2 oz	56.7	0.34	5.5
3 oz	85	0.51	8.26
4 oz	113.4	0.67	11.01
6 oz	170.1	1.01	16.51
8 oz	226.8	1.35	22.02
12 oz	340.2	2.02	33.03
16 oz	453.6	2.7	44.04

What a cup of whole flaxseed weighs, and why it can differ

USDA’s weight for “1 cup, whole” is 168 g. Next to a cup of water, which holds about 236.6 g, that is 71% of the weight of a cup of water, so it is lighter than the same volume of water. The same cup works out at 0.71 g per millilitre.

USDA lists one cup measure for whole flaxseed (“1 cup, whole”), so this page has no second figure to compare it with; if a recipe depends on the exact amount, weigh it.

USDA lists slightly different weights for the tablespoon and the teaspoon here: 3 teaspoons come to 10.2 g and 1 tablespoon is 10.3 g. The gap is rounding in the source figures.

Counting calories instead of cups? See calories and macros in flaxseed, per 100 g and per portion.

Frequently asked questions

How many grams are in 1 cup of whole flaxseed?

USDA measures 1 cup of whole flaxseed (its portion is listed as “1 cup, whole”) at 168 g, which is 5.93 oz.

How many cups is 500 g of whole flaxseed?

500 g of whole flaxseed is 2.98 cups, using 168 g per cup of whole flaxseed. A 1 kg bag of whole flaxseed would fill 5.95 cups, and a 1 lb pack of whole flaxseed would fill 2.7.

How much does a part of a cup of whole flaxseed weigh?

Half a cup of whole flaxseed is 84 g, a third of a cup of whole flaxseed is 56 g and a quarter cup of whole flaxseed is 42 g. For small amounts, 1 tablespoon of whole flaxseed is 10.3 g (0.36 oz) and 2 tablespoons of whole flaxseed are 20.6 g.

If my recipe uses 250 ml metric cups, how much whole flaxseed is that?

A 250 ml cup is about 5.7% larger than a US cup, so a metric cup of whole flaxseed comes to about 177.5 g, going by USDA’s 168 g for a US cup of whole flaxseed. The weights on this page are for the US cup of about 237 ml.

Is it better to weigh whole flaxseed than to measure it by the cup?

For baking, yes. USDA lists one cup measure for whole flaxseed (“1 cup, whole”), so this page has no second figure to compare it with; if a recipe depends on the exact amount, weigh it. Next to water, a cup of whole flaxseed is 71% of the weight of a cup of water, so it is lighter than the same volume of water, and 168 g on a scale is 168 g however the whole flaxseed was scooped.

What weighs about the same as a cup of whole flaxseed?

Among these converters, chocolate chips (168 g per cup) and white rice flour (158 g per cup) come closest to 168 g. Same volume, different ingredient: the weights are close, but the foods are not interchangeable.

Weighed your whole flaxseed? Log it in seconds

Once the recipe is in grams, CalorTracker turns it into calories and macros: snap a photo, say what you ate or type it, and the AI estimates the nutrition for you to check. Free to start.

Start free on the web

Weights are USDA averages for the entry named below. Packing, sifting, brand and moisture change the weight of a real cup, so treat them as a good starting point, not a lab measurement.

USDA describes this entry as “Seeds, flaxseed” (FoodData Central SR Legacy 2018-04).

Source: USDA FoodData Central, FDC 169414, retrieved October 22, 2026. How we calculate.