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Salt & Sodium Calculator
Convert sodium in milligrams to salt in grams (×2.5) and back, compare with the NHS limit of 6 g salt and the US limit of 2,300 mg sodium a day, and check if a food is high in salt per 100 g.
Salt & sodium calculator
US labels show sodium in milligrams; UK labels show salt in grams. Convert between them and compare with daily limits.
Salt
Sodium
Is this food high in salt?
Check the salt per 100 g on the label (UK traffic-light rules).
🟠 Medium
High: more than 1.5 g salt (0.6 g sodium) per 100 g. Low: 0.3 g salt (0.1 g sodium) or less.
✅ Rules last checked:
📚 Official sources: NHS: Salt in your diet · NHS: How to read food labels · Dietary Guidelines for Americans
We build every tool from the official rules and re-check them when they change. Always confirm with the official source before you rely on a result.
🛠️ Spotted a mistake or an out-of-date rule? Tell us
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Questions people ask
How do I convert sodium to salt?+
Multiply sodium by 2.5. For example, 400 mg sodium = 1 g salt.
How much salt is too much?+
The NHS says adults should have no more than 6 g of salt a day, about a level teaspoon, including salt already in food.