Calculator Inputs
Use direct sodium percentage, compound conversion, or solution concentration mode.
Example Data Table
| Scenario | Method | Key Input | Total Sodium (mg) | NaCl Equivalent (mg) | Daily Value (%) |
|---|---|---|---|---|---|
| Lab blend A | Direct percentage | 5 g sample, 1.80% sodium | 90.00 | 228.79 | 3.91 |
| Salt premix | Compound conversion | 2 g NaCl, 98% purity | 771.62 | 1,961.00 | 33.55 |
| Bicarbonate batch | Compound conversion | 1.5 g NaHCO₃, 100% purity | 410.50 | 1,043.81 | 17.85 |
| Process solution | Solution concentration | 850 mg/L, 250 mL | 212.50 | 540.17 | 9.24 |
Formula Used
1. Direct sodium percentage: Sodium (mg) = Sample mass (g) × Sodium % ÷ 100 × 1000.
2. Compound conversion: Sodium (mg) = Compound mass (g) × Purity × Sodium fraction × 1000.
3. Solution concentration: Sodium (mg) = Concentration (mg/L) × Volume (L).
4. Dilution and recovery correction: Corrected sodium = Raw sodium × Dilution factor ÷ (Recovery % ÷ 100).
5. Sodium per serving: Sodium per serving = Corrected sodium ÷ Number of servings.
6. NaCl equivalent: Salt equivalent = Sodium × 58.44277 ÷ 22.98976928.
7. Sodium mmol: mmol sodium = Sodium (mg) ÷ 22.98976928.
8. Daily value percent: %DV = Sodium per serving ÷ Daily value × 100.
9. Basis normalization: For solids, mg per 100 g = Total sodium ÷ Mass × 100. For solutions, mg per 100 mL = Total sodium ÷ Volume × 100.
How to Use This Calculator
Choose the method that matches your available chemistry data. Use direct percentage when elemental sodium is already known, compound conversion when a sodium compound mass is known, and solution mode for measured sodium concentration.
Enter the sample or batch mass for solids, or the solution volume for liquids. Add servings if you want nutrition-style per-serving output. Serving size is optional reference information for your report.
Apply a dilution factor if the lab result came from a diluted aliquot. Enter analytical recovery when you want recovery-corrected sodium values. Keep recovery at 100% for uncorrected output.
Set the daily value reference, then calculate. Review the total sodium, serving sodium, salt equivalent, mmol sodium, basis-normalized results, and the interpretation statement for quick assessment.
Frequently Asked Questions
1. What does this calculator measure?
It estimates elemental sodium in a sample, batch, or solution. It also converts sodium into salt equivalent, per-serving values, mmol, and basis-normalized results like mg per 100 g or mg per 100 mL.
2. What is the difference between sodium and salt equivalent?
Sodium is the elemental amount. Salt equivalent expresses that sodium as sodium chloride mass. The calculator uses molar-mass conversion, so the salt equivalent is about 2.542 times the sodium mass.
3. Can I use compounds other than sodium chloride?
Yes. The calculator includes sodium chloride, sodium bicarbonate, sodium carbonate, monosodium glutamate, sodium benzoate, and a custom sodium fraction option for other sodium-containing compounds.
4. Why is dilution factor included?
Dilution factor is useful for analytical work. If you measured sodium after dilution, the calculator multiplies the measured amount back to the original sample basis.
5. What does recovery correction mean?
Recovery correction adjusts sodium upward when the analytical method recovers less than 100% of the true value. Leave it at 100% if your method already reports corrected results.
6. How is daily value percentage calculated?
The calculator divides sodium per serving by the chosen daily value reference, then multiplies by 100. The default reference is 2300 mg, but you can replace it with another standard.
7. When should I use mg per 100 g?
Use mg per 100 g when comparing solid samples, powders, premixes, or food-style labels on a common basis. It gives a density-style sodium metric independent of serving count.
8. When is solution mode the best choice?
Use solution mode when sodium is reported as mg/L from an instrument or lab report. It converts concentration and volume into total sodium and also reports mg per 100 mL.