Whether you're tracking sodium for heart health, managing blood pressure, or following a low-sodium diet, knowing how much sodium is in your tofu is essential. Tofu is a staple plant-based protein, but its sodium content varies widely by type — from silken to extra-firm, and especially in pre-seasoned or baked varieties.
This Tofu Sodium Calculator helps you quickly estimate the sodium in any serving of tofu. Simply select the tofu type, enter your serving size, and optionally adjust for rinsing (which can reduce sodium by up to 30%). The tool also provides a breakdown of sodium per 100g and per serving, plus a comparison to daily recommended limits. Perfect for meal preppers, vegans, vegetarians, and anyone on a DASH or low-sodium diet.
🧂 Tofu Sodium Calculator
📊 Results
How to Use This Tool
Select your tofu type from the dropdown — options range from silken (very low sodium) to baked/seasoned (often high sodium). Enter your serving size in grams or ounces. If you rinse your tofu under cold water before use, select "Yes" — this can reduce sodium by roughly 30%. Click "Calculate Sodium" to see the sodium content per 100g, per serving, and as a percentage of the daily recommended limit (2,300 mg). Use the Reset button to clear results and start a new calculation.
How It Works
The calculator uses average sodium values for each tofu type based on USDA FoodData Central and common commercial products. Silken tofu typically has ~5 mg sodium per 100g, while extra-firm can have ~20 mg. Baked or seasoned tofu can exceed 350 mg per 100g due to added salt and marinades. Rinsing reduces surface sodium — studies suggest a 30% reduction is a reasonable estimate. The formula is: Sodium per serving = (Sodium per 100g × serving weight in grams) / 100. The daily limit of 2,300 mg aligns with the FDA's general recommendation for healthy adults.
Example Calculations
Example 1: 150g firm tofu, not rinsed. Sodium per 100g = 15 mg. Total = (15 × 150) / 100 = 22.5 mg. That's just 1% of the daily limit.
Example 2: 100g baked tofu, not rinsed. Sodium per 100g = 350 mg. Total = 350 mg. That's 15.2% of the daily limit.
Example 3: 200g extra-firm tofu, rinsed. Sodium per 100g = 20 × 0.7 = 14 mg. Total = (14 × 200) / 100 = 28 mg. Rinsing saved 12 mg.
Tips for Reducing Sodium in Tofu
Rinsing is the easiest way to lower sodium — a quick 30-second rinse under cold water can remove a significant portion of surface salt. For baked or seasoned tofu, look for "low sodium" or "no salt added" labels. If you're on a strict low-sodium diet (e.g., for hypertension or kidney disease), opt for silken or soft tofu and avoid pre-seasoned varieties. You can also press tofu to remove excess liquid, which may carry away some dissolved sodium.
Frequently Asked Questions
Is tofu naturally low in sodium? Plain tofu (silken, soft, firm, extra-firm) is naturally low in sodium — typically under 25 mg per 100g. The sodium comes from the coagulant (often calcium sulfate or magnesium chloride) used during processing.
Does rinsing really reduce sodium? Yes, rinsing can reduce sodium by 20–40%. The exact amount depends on the tofu's surface area and how long you rinse. Our 30% estimate is a conservative average.
How does tofu sodium compare to other protein sources? Tofu is much lower in sodium than most processed meats (e.g., bacon ~1,500 mg/100g) and many cheeses (e.g., feta ~1,100 mg/100g). It's a heart-friendly protein choice.
Can I use this calculator for other soy products? The values are specific to tofu. For tempeh or edamame, sodium levels differ — check our Tempeh Nutrition Calculator for tempeh data.
Standard Sodium Values Reference
| Tofu Type | Sodium per 100g (mg) |
|---|---|
| Silken | 5 |
| Soft | 8 |
| Medium | 12 |
| Firm | 15 |
| Extra-Firm | 20 |
| Baked/Seasoned | 350 |
Data sourced from USDA FoodData Central and common product labels. Values may vary by brand.