take some other food of known weight eg sugar bag and then compare the weight with thatvia balncing or simply holding and feeling .. theres no way to be accurate
you cant.
Depends how big the grain of salt is.
Buy some scales and find out
115 grams
2 grams
4 tbsp of salt is approximately 60 grams
It weighs approximately 6 grams.
5 grams 0.5 Newtons 0.5 centigrams 0.005 kilograms
You have said yourself that is about 200 grams.
Weigh it in grams, then, as the density of table salt is about 2.17 g/cc, divide the weight by 2.17 and the answer will be the volume of salt in cc.
There will be a bit of variation in a measurement because salt crystals are not a uniform size. Now the good news, thanks to the Salt Institute, which is a non-profit trade association for the salt industry. They have the straight scoop (no pun intended) on salt. Salt weighs about 6 grams per teaspoon or about 18 grams per tablespoon. That makes your 3 tablespoons of salt weigh in at about 54 grams.
1 Teaspoon of salt is equal to about six gram of salt so 1/4 Teaspoon of salt weighs about 1-1/2 grams. To get 1 gram of sodium from table salt, you would need to ingest 2.5 grams (1 gram from sodium, 1.5 grams from chloride). A teaspoon of salt weighs approximately 6.6 grams.
You can not equate volume and weight without knowing the density of the substance being measured.A tablespoon of feathers would not weigh as much as a tablespoon of salt.