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ppm / ppb Calculator
Trace concentrations by exact mass fraction — or the dilute-aqueous mg/L shortcut, clearly labeled as such.
Calculator
Results update as you type. Every step of the working is shown below.
Examples:
Result
Enter values above — the answer appears here instantly, with full working.
Formula used
ppm = (m_solute / m_solution) × 10⁶ ≈ mg/L for dilute aqueous solutions
Every result substitutes your values into this relation step by step above.
Assumptions
- Exact mode: solute and solution masses in the SAME unit.
- mg/L mode assumes density ≈ 1 g/mL (dilute aqueous) — flagged in results.