Sodium vs. Salt: How to Compare Foods and Read Labels

September 13, 2026

Published by Tranquilla Wellness · Our editorial process

Sodium and table salt are related, but they are not identical. When comparing food labels, use the nutrient and unit actually printed on the package. Comparing milligrams of sodium with grams of salt as if they were the same number will mislead you.

Understand the US sodium line

The FDA describes sodium as a mineral found in table salt and other ingredients. It gives a US label Daily Value of less than 2,300 milligrams a day. That is a population reference, not a personalized prescription. Packaged foods can contribute substantial sodium even when they do not taste particularly salty. Source: FDA, Sodium in Your Diet.

Compare a food you actually buy

Choose two soups or sauces with the same serving quantity. Imagine one contains 480 mg of sodium and another 320 mg per serving. The difference is 160 mg. If you use two servings, those totals become 960 mg and 640 mg. These invented values demonstrate the calculation; they are not claims about real brands.

Write the portion alongside the number. “320 mg” without a serving amount is not enough to repeat the comparison next week.

Read package claims carefully

The FDA distinguishes “reduced sodium” from “low sodium”: reduced describes a reduction relative to the regular product, while low has a defined absolute threshold. “No salt added” does not necessarily mean sodium-free. Read the panel instead of assuming that different claims are interchangeable.

A practical grocery note

Name the food you want to compare.
Check whether the label lists sodium or salt.
Match the serving amount and unit.
Record the quantity you expect to use.
Check whether the alternative suits your budget and preferences.

For a meal with several packaged components, write each one separately. A sauce, a filling and a topping can be easier to review as three small decisions than as one vague concern about the whole meal.

Make one change you can repeat

Try comparing your usual product with another familiar option before overhauling the entire shopping list. Keep notes on taste and convenience too. A purchase you dislike and never use is not an effective routine.

If a clinician has given you a specific sodium plan, follow that advice. Do not assume a potassium-containing salt substitute is appropriate for you, particularly when medicines or kidney problems may matter; ask a health professional.

Readers outside the US should use local labeling guidance and the units on their own products.