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PPM (parts per million) converters translate between PPM, percentage, fraction, and other concentration units.
Trin-for-trin guide
- 11% = 10,000 PPM
- 21 PPM = 0.0001% = 1 part per million
- 3For water: 1 PPM ≈ 1 mg/L (at standard conditions)
Løste eksempler
Input
Air pollution 5 PPM of ozone
Resultat
0.0005% concentration, critical threshold for health
Very small but significant
Almindelige fejl at undgå
- ✕Assuming PPM to mg/L conversion works for all substances (density-dependent)
- ✕Confusing PPM by weight with PPM by volume
Ofte stillede spørgsmål
When is PPM used instead of percentage?
For very small concentrations (<0.01%) where percentage is unwieldy. Easier to work with whole numbers.
Does PPM conversion to mg/L always hold?
No, depends on density. For water yes (~1 mg/L = 1 PPM), but other fluids require density correction.
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