A little less guesswork.
Aquarium salt — concentration arithmetic calculator
Grams of salt per litre, chosen independently
Read the product guide and worked examples ↓
Clear amounts. Visible assumptions.
Your calculation, explained
Choose a product and enter the water you’re actually dosing.
- Check the exact product and formulation.
- Use measured water, or make an explicit estimate.
- Review the amount, source and any schedule.
Product guide · edited 28 October 2026
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What does this salt tool actually calculate?
It multiplies water volume in litres by a concentration in g/L that you have independently chosen. The result is grams. It does not recommend a treatment level or convert a spoon into a known mass.
Worked examples
These illustrations use 100 L of measured water, without a decor deduction. The hypothetical 0.2 g/L input is an arithmetic example, not a recommended concentration. Starting salt is assumed to be zero.
Amount to reach chosen concentration from zero
| Stage | Amount or action for 100 L |
|---|---|
| Amount to reach chosen concentration from zero | 20 g |
Example only. Your calculation above uses your own inputs. Small amounts and powder fractions still need equipment that can measure them reliably.
Before you measure
Use only where the starting water has no salt. Existing salt, evaporation and repeat treatment are outside this simple calculation. The software limit is not a livestock safety range.
Product-specific checks from the calculation record
- This tool multiplies an independently chosen concentration by water volume. It does not recommend a concentration or establish livestock suitability.
Does a worked example recommend that concentration?
No. The example is hypothetical arithmetic only. Product suitability and a target concentration must come from a separate applicable instruction.