Free tools
Small tools. No sign-up.
Three calculators we kept reaching for at the bench. Open the page, get your number, close the tab.
Results are indicative and for educational use. Verify against your institution's protocols and the manufacturer's SDS before any real-world use. Not valid as a regulatory label. Terms of use.
Dilution calculator
Uses C₁·V₁ = C₂·V₂. Leave one field empty and we'll fill it in.
Result: V1 = 10.000
ppm ↔ mg/L converter
In water (density 1), 1 ppm ≈ 1 mg/L. Change the density for other solvents.
100 ppm100.00 mg/L
Compatibility checker
Pick two substances and see whether they can safely touch.
Do not mix