Home›Calculators›Health›Sodium in Salt Calculator

Sodium in Salt Calculator

Health

Convert table salt (NaCl) grams to sodium milligrams and back, and compare your intake against the recommended daily sodium limit instantly.

Reviewed by the thecalcu.com team · Last updated July 23, 2026

Convert
Amount (grams of salt)
g

Sodium

0mg

% of Daily Sodium Limit

0%

Based on the FDA/USDA recommended daily sodium limit of 2,300 mg.

What is a Sodium in Salt?

A Sodium in Salt Calculator converts between table salt (sodium chloride, NaCl) and its actual sodium content, since these two numbers are often confused but are not the same thing. Salt is a compound of sodium and chloride, and sodium makes up only about 39.34% of salt's total weight, so a gram of salt does not equal a gram of sodium. This calculator applies that exact molecular ratio to convert salt grams into sodium milligrams, or sodium milligrams back into salt grams, and shows the result against the FDA/USDA recommended daily sodium limit of 2,300 mg.

This distinction matters most when comparing nutrition labels from different countries, some list "salt," others list "sodium" directly, or when trying to understand how much of your daily sodium budget a specific amount of added salt represents. Pairing this with the Calorie Calculator or BMR Calculator gives a fuller picture of daily nutrition planning.

Why Use a Sodium in Salt Calculator?

Nutrition labels aren't consistent about whether they report "salt" or "sodium," which makes direct comparisons confusing without doing the conversion math yourself. This calculator removes that friction, enter either value and get the other instantly, along with context on how it compares to the recommended daily sodium limit.

It's especially useful for anyone managing blood pressure through diet, comparing packaged foods that use different labeling conventions, or simply trying to understand how much sodium a teaspoon of table salt actually contains.

Who Should Use This Calculator?

  • Anyone managing blood pressure or heart health who needs to track sodium intake accurately against the 2,300 mg daily limit.
  • People reading food labels from different countries that report salt content instead of sodium, or vice versa.
  • Home cooks measuring recipes who want to know the sodium impact of a given amount of added salt.
  • Dietitians and nutrition students who need a quick, precise molecular-ratio conversion rather than a rough estimate.
  • Anyone on a low-sodium diet recommended by a healthcare provider who wants to double-check packaged food sodium content.

What Insights Does the Sodium in Salt Calculator Give You?

  • Converted Amount, the result of your conversion, either sodium in milligrams (from salt) or salt in grams (from sodium); this is the number to compare against food labels or recipes.
  • % of Daily Sodium Limit, shows what percentage of the FDA/USDA recommended 2,300 mg daily sodium limit your entered amount represents, so you can immediately see whether a single food item or serving is a small or large share of your day.

How to use this Sodium in Salt calculator

  1. Choose your conversion direction, Salt (g) → Sodium (mg) or Sodium (mg) → Salt (g).
  2. Enter the Amount in the appropriate unit (grams for salt, milligrams for sodium).
  3. Review the Converted Amount shown in the result card.
  4. Check the % of Daily Sodium Limit to understand how significant that amount is relative to the 2,300 mg daily guideline.
  5. Repeat with different amounts to compare multiple foods or recipes side by side.
Show formula & methodology ↓Show less ↑

Formula & Methodology

Sodium fraction of table salt (NaCl): Na (22.99 g/mol) ÷ NaCl (58.44 g/mol) ≈ 0.3934

Salt → Sodium: Sodium (mg) = Salt (g) × 1000 × 0.3934

Sodium → Salt: Salt (g) = Sodium (mg) ÷ 0.3934 ÷ 1000

Worked example: Converting 6 grams of salt (about 1 teaspoon) to sodium:

Sodium = 6 × 1000 × 0.3934 = 2,360 mg
% of daily limit = 2,360 ÷ 2,300 × 100 ≈ 103%

This single teaspoon of salt slightly exceeds the entire FDA/USDA recommended daily sodium limit of 2,300 mg.

Frequently Asked Questions

How much sodium is in a gram of salt?
One gram of table salt (sodium chloride, NaCl) contains approximately 393.4 mg of sodium, since sodium makes up about 39.34% of salt's molecular weight. So 5 grams of salt, roughly one teaspoon, contains about 1,967 mg of sodium, close to the full daily recommended limit.
Why isn't salt the same as sodium?
Table salt is a compound made of sodium and chloride bonded together, so when you read 'salt' on a label it refers to the whole compound, not sodium alone. Nutrition labels in the US report sodium content directly, which is why converting between salt weight and sodium content is useful for label comparisons.
What is the formula used to convert salt to sodium?
The conversion uses the molecular weight ratio of sodium to sodium chloride: sodium (22.99 g/mol) divided by NaCl (58.44 g/mol), which equals approximately 0.3934. Multiply the salt weight in milligrams by this factor to get the sodium content in milligrams.
What is the recommended daily sodium limit?
The FDA and USDA Dietary Guidelines recommend limiting sodium intake to less than 2,300 mg per day for most healthy adults, which is roughly equivalent to one teaspoon (about 5.8 g) of table salt. Some health organizations, including the American Heart Association, recommend an even lower ideal limit of 1,500 mg per day for optimal heart health.
How do I convert sodium back to salt?
Divide the sodium amount in milligrams by 0.3934 to get the equivalent salt weight in milligrams, then divide by 1,000 to convert to grams. This calculator does that conversion automatically when you select 'Sodium (mg) → Salt (g)'.
Why do nutrition labels list sodium instead of salt?
US nutrition labels list sodium because it's the specific mineral the body regulates and that affects blood pressure, while 'salt' as a term can be ambiguous since foods also contain sodium from sources other than table salt, such as sodium bicarbonate or monosodium glutamate. Reporting sodium directly gives a more precise and consistent measurement across all food sources.
Is sea salt lower in sodium than table salt?
No, gram for gram, sea salt and table salt contain nearly identical amounts of sodium, since both are primarily sodium chloride. Any perceived difference usually comes from sea salt's coarser crystal size, meaning less salt fits in the same volume (like a teaspoon), not a lower sodium concentration by weight.
How much salt is in a teaspoon?
One level teaspoon of table salt weighs approximately 5.9 grams, which converts to roughly 2,325 mg of sodium, essentially the entire daily recommended sodium limit in a single teaspoon.
Does this calculator account for sodium from other sources like MSG or baking soda?
No, this calculator specifically converts between table salt (sodium chloride) and sodium content using the standard NaCl molecular ratio. Other sodium-containing compounds like monosodium glutamate (MSG) or sodium bicarbonate have different molecular weights and would require a separate conversion factor.
Why does high sodium intake matter for health?
Excess sodium intake is strongly linked to elevated blood pressure, which increases the risk of heart disease and stroke over time. Most people who exceed the recommended sodium limit do so primarily from processed and restaurant foods, not from salt added at the table.
How can I use this calculator to check a food label?
If a food label lists salt content instead of sodium (common outside the US), enter that gram amount in 'Salt → Sodium' mode to see the equivalent sodium in milligrams, then compare it against the 2,300 mg daily limit shown in the result.
Also known as
salt to sodium calculatorsodium calculatorNaCl to sodium mgtable salt sodium contentdaily sodium limit calculator