Sodium is the single most over-consumed mineral in the modern diet. The average American eats roughly 3,400 milligrams of sodium per day — nearly 50% above the strict upper limit set by the U.S. Department of Agriculture — and most of it does not come from the salt shaker at the dinner table. It comes from bread, cured meats, canned soups, deli sandwiches, frozen dinners, sauces, and restaurant meals, where salt is used as a preservative and flavor enhancer long before food reaches your plate.
This sodium calculator takes your estimated daily intake and compares it directly to the two benchmark guidelines: the USDA's 2,300 mg per day upper limit and the American Heart Association's 1,500 mg per day ideal for most adults. It also converts those numbers into grams of table salt, because "2,300 mg of sodium" is much harder to picture than "about 5.75 grams of salt" — roughly a teaspoon and a quarter.
Adjust the three inputs on the page and every figure updates instantly: your daily limit, your current salt equivalent, how far over or under you are, your weekly sodium allowance, and your intake normalized to milligrams per kilogram of body weight.
How to Use
- Enter your Current Daily Sodium Intake. If you have a 24-hour food log, add the sodium values from every packaged item and restaurant meal you ate. If you do not have a log, start with the U.S. average of about 3,400 mg/day and adjust downward if you cook most meals from scratch.
- Choose your Target Guideline. Pick 2,300 mg if you want the USDA's strict ceiling for healthy adults under 51. Pick 1,500 mg if you follow the American Heart Association's ideal target — recommended especially if you have high blood pressure, diabetes, chronic kidney disease, or are African American or over 50.
- Enter your Body Weight in pounds. This normalizes your intake to milligrams per kilogram of body weight, a useful weight-adjusted comparison. The AHA/USDA limits themselves are not scaled to body weight — they apply the same way to everyone — but the per-kg figure lets you compare yourself to people of different sizes and track changes as your weight shifts.
- Read the result card. The top line shows your daily sodium limit and its salt equivalent in grams. The middle block compares your current intake to that limit as both a milligram gap and a percentage. The bottom block scales the limit up to a full week so you can plan shopping and meal prep.
- Use the Percent of Daily Limit figure as a quick scorecard. Anything over 100% means you are eating more than your chosen guideline allows; 148% — the result for an average 3,400 mg day against the 2,300 mg limit — means you are nearly one and a half times the target.
- Re-run the number after a change. Cut one processed meal or swap a canned soup for a low-sodium version, then re-enter your estimate to see the gap close.
The Sodium-to-Salt Conversion
Food labels list sodium, not salt, which confuses a lot of people. Table salt — sodium chloride, NaCl — is about 39.3% sodium by weight. That means every 1 gram of salt contains roughly 400 mg of sodium. The conversion is therefore:
salt grams = sodium mg ÷ 400
Worked example: the USDA's 2,300 mg daily ceiling equals 2,300 ÷ 400 = 5.75 grams of salt per day. The AHA's 1,500 mg ideal equals 1,500 ÷ 400 = 3.75 grams of salt per day. A standard teaspoon of fine table salt weighs about 6 grams, so the AHA target is barely two-thirds of a teaspoon total — for the entire day, across every meal and snack.
A 3,400 mg average intake converts to 8.5 grams of salt, which is roughly 1.4 teaspoons. That does not sound like much, but spread across three restaurant meals and a handful of crackers it adds up quickly, and the excess is what drives blood pressure up over time.
Why the Two Guidelines Differ
The USDA's Dietary Guidelines for Americans set 2,300 mg per day as the upper limit for sodium intake for healthy adults. The American Heart Association goes further and recommends 1,500 mg per day as an ideal target, citing stronger blood-pressure benefits, particularly for people at risk of hypertension, heart disease, or stroke. Both numbers are widely accepted; the 1,500 mg figure is the more aggressive clinical target, while 2,300 mg is the regulatory ceiling used on nutrition labels and in public-health policy.
About 90% of U.S. adults exceed both targets. The calculator lets you choose the bar that matches your own health profile — and shows you, in plain numbers, how big the gap really is.
Examples
Example 1 — The average American. A person logs a typical day: cereal with sodium (~300 mg), a deli sandwich for lunch (~1,200 mg), a can of soup (~800 mg), chips (~200 mg), and a restaurant dinner with sauce (~900 mg). Total intake is 3,400 mg. Against the USDA 2,300 mg limit, they are 1,100 mg over, at 148% of the limit, equivalent to 8.5 grams of salt. Their weekly sodium allowance at the USDA limit is 16,100 mg (about 40.25 grams of salt), and they are blowing through it in five days.
Example 2 — The health-conscious cook. Someone who cooks from whole ingredients and uses no processed food logs 1,800 mg on an average day. Against the AHA 1,500 mg target, they are 300 mg over — only 120% of the stricter limit, but still just above it. A small swap, such as choosing no-salt-added beans and omitting added table salt, drops them to 1,400 mg and under the AHA bar.
Example 3 — Eating out heavily. A person who lunches and dinners at restaurants every day logs 5,200 mg. Against the 2,300 mg USDA ceiling, they are 2,900 mg over at 226% of the limit, equivalent to 13 grams of salt per day. Even against the looser bar, they are more than double the recommended amount — which is exactly the population for whom the AHA pushes the 1,500 mg target hardest.
FAQ
How much sodium per day should I eat?
The USDA Dietary Guidelines recommend no more than 2,300 mg of sodium per day for healthy adults. The American Heart Association recommends an even lower 1,500 mg per day for most adults, especially those with high blood pressure, diabetes, chronic kidney disease, or anyone over 50. Enter your own estimate above to see where you stand.
What is the difference between sodium and salt?
Sodium is a mineral; table salt is a crystal made of about 40% sodium and 60% chloride by weight. One gram of salt contains roughly 400 mg of sodium. To convert sodium on a nutrition label into salt, divide the milligrams of sodium by 400 to get grams of salt. The calculator does this automatically for both your daily limit and your current intake.
Is 2,300 mg of sodium a lot?
It is the strict upper limit set by the USDA for healthy adults. The average American eats about 3,400 mg per day, so most people are already 20–50% above the 2,300 mg ceiling. The AHA considers 1,500 mg per day a better long-term target for cardiovascular health.
How do I know how much sodium I am eating?
Read the Nutrition Facts panel on every packaged food and add the "sodium" milligrams per serving, multiplying by the number of servings you actually eat. For restaurant meals, use the chain's online nutrition calculator — most large chains publish sodium values per dish. A 24-hour log captured once or twice a week is usually enough to estimate your typical daily intake within a few hundred milligrams.
What foods are highest in sodium?
About 70% of sodium in the American diet comes from processed and restaurant foods, not from the salt shaker. The biggest contributors are breads and rolls, cured deli meats, pizza, canned soups and beans, sauces and dressings, savory snacks like chips and pretzels, and poultry with added brine. Choosing low-sodium or no-salt-added versions of these foods is the single most effective way to bring intake down.
What happens if I eat too much sodium?
Diets high in sodium are consistently linked to elevated blood pressure, which is a leading risk factor for heart attack, stroke, and kidney disease. Reducing sodium intake from typical levels toward the 1,500–2,300 mg range has been shown in large studies to lower blood pressure and reduce cardiovascular events, especially in people who are salt-sensitive.
How can I cut my sodium intake quickly?
Three high-impact swaps: choose no-salt-added canned beans and vegetables, replace deli meats and cured snacks with fresh unprocessed protein, and ask for sauces and dressings on the side at restaurants. Most people can drop 500–1,000 mg per day in a week without noticing a flavor difference, especially if they boost flavor with herbs, citrus, garlic, and vinegar.
What does milligrams per kilogram of body weight mean?
The calculator divides your daily sodium intake by your body weight in kilograms (pounds divided by 2.205). For the average 170 lb adult eating 3,400 mg/day, that works out to about 44 mg/kg. Populations with low blood pressure tend to stay below 50 mg/kg, while Western diets typically run 150–200 mg/kg. The AHA/USDA limits are absolute (1,500 or 2,300 mg/day) and do not scale with body size, but the per-kg figure is a useful secondary benchmark, especially if your weight changes or you are comparing yourself to someone of a different size.
Disclaimer
This sodium calculator is provided for informational purposes only and is not medical advice. It compares your estimated intake to general public-health guidelines published by the USDA and the American Heart Association; individual needs vary based on age, blood pressure, kidney function, medication, and medical history. The sodium-to-salt conversion uses the standard 400 mg sodium per 1 g salt approximation. Always discuss your sodium intake and diet with a qualified doctor or registered dietitian, especially if you have hypertension, heart disease, kidney disease, or are pregnant.