Fresh plums are among the lowest-sodium fruits you can eat — a medium raw plum has only a trace of sodium, well under 1 mg. But once plums become prunes, juice, canned fruit, plum sauce, or the famously salty pickled plum (umeboshi), the sodium picture changes dramatically. This plum sodium calculator converts any plum-based food you choose into a precise sodium estimate for your serving size, so you no longer have to guess.
Choose a product from the list, enter your serving in grams, ounces, or whole pieces, and press Calculate. The tool returns total sodium in milligrams, its percent Daily Value based on a 2,300 mg reference, the equivalent amount of table salt, and a low/moderate/high category. It is designed for people tracking sodium for blood pressure management, low-sodium or kidney-friendly diets, and anyone comparing fresh versus processed plum products.
🧂 Plum Sodium Calculator
Find out how much sodium is in fresh plums, prunes, plum juice, plum sauce, and pickled umeboshi.
How the Sodium Is Calculated
The calculator stores a reference sodium value for each plum product in milligrams per 100 grams. These values come from typical nutrition data for each product form. When you enter a serving size, the tool first converts everything to grams using these rules: 1 ounce = 28.3495 grams, and whole pieces are converted with representative weights such as 66 g for a medium fresh plum, 28 g per canned plum half, 8 g per prune, and 10 g per small pickled plum. Then it applies the formula below.
Sodium (mg) = reference sodium per 100 g × serving grams ÷ 100
Daily Value (%) = sodium ÷ 2,300 mg × 100
Salt equivalent (g) = sodium × 2.5 ÷ 1,000
The 2,300 mg figure is the FDA daily value for sodium on nutrition labels. Salt equivalence uses the fact that table salt is about 40% sodium by weight, so multiplying sodium in grams by 2.5 estimates the salt weight. This is useful when you think in teaspoons: 1 teaspoon of salt weighs about 6 g and supplies roughly 2,300 mg sodium.
Reference Sodium Values
The values below are approximate and can vary by brand, recipe, packing liquid, and plum variety. Treat them as planning estimates rather than lab-precise numbers.
| Plum product | Sodium per 100 g | Category at 100 g |
|---|---|---|
| Fresh raw plum | 0 mg | Low |
| Dried prunes | 2 mg | Low |
| Plum juice | 4 mg | Low |
| Canned plums (syrup pack) | 19 mg | Low |
| Plum sauce | ~500 mg | High |
| Pickled plum (umeboshi) | ~5,800 mg | Very high |
Notice how wide the range is: fresh plums are essentially sodium-free, while pickled plums are among the saltiest foods in any produce aisle. Canned plums, prunes, and plum juice sit at the low end but can still contribute sodium if you eat large servings.
Worked Examples
Example 1: one pickled plum. A traditional umeboshi weighs about 10 g. Using 5,800 mg per 100 g: 5,800 × 10 ÷ 100 = 580 mg sodium. That is 580 ÷ 2,300 × 100 = 25% of the daily value in a single small fruit, with a salt equivalent of 580 × 2.5 ÷ 1,000 = 1.45 g of salt.
Example 2: canned plums at breakfast. Imagine you eat 140 g of canned plums in syrup. At 19 mg per 100 g, the sodium is 19 × 140 ÷ 100 = 26.6 mg — under 1.2% of the daily value and comfortably low. The story is different if the same serving were plum sauce: 500 × 140 ÷ 100 = 700 mg, or 30% DV.
Common Mistakes to Avoid
People often confuse prunes (dried plums) with pickled plums. Prunes have only ~2 mg sodium per 100 g; umeboshi can have thousands. Another common error is entering a serving in ounces but forgetting to convert; if you use the calculator's ounce option, that conversion is done for you. Finally, do not ignore the product form: light syrup, heavy syrup, juice pack, and spiced plum sauce all differ in sodium because of added salt and seasoning.
Quick label-reading tip: On any packaged plum product, the nutrition facts label lists sodium per serving and often per 100 g. Compare those numbers with the reference table above to identify unexpected sodium sources like salt, soy sauce, or sodium benzoate.
Frequently Asked Questions
Are fresh plums safe for a low-sodium diet? Yes. Fresh plums contain virtually no sodium and are naturally low in calories, with some fiber and vitamin C. They fit easily into DASH, low-sodium, and kidney-friendly meal plans.
Why is pickled plum so high in sodium? Traditional umeboshi is preserved with heavy salt, often 15–20% of the fruit's weight. This salt draws out moisture, inhibits bacteria, and gives umeboshi its intense flavor. The same applies to some Chinese salted plums, which can be even saltier.
Can I use this calculator for Chinese plum snacks or plum candy? The calculator is designed for the six product categories listed. For other plum products, use the nutrition label: find sodium per serving and multiply by your serving size ratio.
What does "low sodium" actually mean? In the calculator, low is under 140 mg per serving, moderate is 140–400 mg, and high is over 400 mg. These thresholds follow common nutrition guidance: a food is labeled "low sodium" if it has 140 mg or less per serving.
For more on sodium and health, see the FDA Sodium and Your Health information page and the World Health Organization salt reduction fact sheet.