How many grams are in a cup of flax seeds?

A cup of whole flax seeds weighs about 168 grams, which is roughly 5.93 ounces.

How many grams are in a tablespoon of flax seeds?

Since there are 16 tablespoons in a cup, one tablespoon of whole flax seeds weighs about 10.5 grams using the same 168 g/cup density.

Does ground flaxseed weigh the same as whole flaxseed per cup?

No. Grinding flaxseed into meal introduces more air between the particles, so a cup of ground flaxseed weighs less than a cup of whole seeds. This tool is for whole, unground flax seeds.

Is this the same for brown and golden flax seeds?

Yes, brown and golden flax seeds have essentially the same density, so the same 168 g/cup figure applies to both.

Is this a US cup or a metric cup?

This tool uses the US cup (236.6 ml). A metric cup (250 ml) would give a slightly higher gram result.

Flax Seeds Cups to Grams

Enter a number of cups of whole flax seeds to get the weight in grams and ounces.

Flax Seeds Converter

Amount in Cups

Result

168 g

≈ 5.93 oz

Quick Reference Table

Cups	Grams	Ounces

Values are measured by US cup (236.6 ml) using a density of 168 grams per cup of whole flax seeds. Ground flaxseed (flaxseed meal) weighs less per cup because grinding adds air between the particles.

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Summary

Whole flax seeds are small and dense, so a cup of them weighs more than many lighter seeds and grains. This tool converts any cup amount to grams and ounces using a standard density of 168 grams per cup, and includes a reference table for common measurements so you do not need to run the math yourself.

How it works

Enter the number of cups of whole flax seeds you want to convert.
The gram weight updates instantly based on a fixed density of 168 g per cup.
The ounce equivalent is shown alongside the gram result.
Use the reference table for common cup amounts without typing a value.

Use cases

Scale a smoothie or baking recipe written in cups to a kitchen scale in grams.
Convert a US recipe to metric for baking or cooking outside the US.
Check how much a serving of flax seeds weighs for a fiber or macro plan.
Portion out flax seeds by weight for batch meal prep.
Match a bulk-bin cup scoop to the gram listing on a packaged product.

Frequently Asked Questions

Last updated: 2026-09-09 · Reviewed by Nham Vu