Probably Stolen Water Purity Calculator
Enter two measured volumes and purity percentages. The result is volume-weighted arithmetic purity — useful for labelling math after you test, not a substitute for filtration or the Water Purifier.
Blended purity (%) = (volume A × purity A + volume B × purity B) ÷ (volume A + volume B). Keep units consistent, retest in-game, then label the measured grade.
What the arithmetic assumes
Volumes add directly and the entered purity percentages are conserved. The calculator does not model reactions, pouring loss, filter residue floors, machine caps or hotfix-specific purifier budgets.
Contaminant volume is estimated as total volume × (1 − blended purity ÷ 100). Use the same unit for both volumes (ml works well).
Use it with the water guide
- 01
Test both source batches
Enter the measured purity, not the printed label claim.
- 02
Blend only after you understand contaminants
Adding cleaner water dilutes contaminants; it does not remove the same impurities a filter or purifier targets.
- 03
Retest and label the finished container
Follow the water purification guide for tool choice and the 1.0.0.2 purifier changes.
Sources & version notes
Arithmetic identity used by public Probably Stolen water calculators. This page does not claim an independent in-game mixture test.
- ProbablyStolenDB water purity calculator ↗
Documents the same volume-weighted purity formula and contaminant estimate.
- ProbablyStolen.store liquid blend calculator ↗
States the arithmetic assumptions and session-only behaviour.
- Our water purification guide
Treatment order, grades and hotfix notes after you finish the math.