Parts per million in dilute water (≈ mg/L) to Percent mass per volume
1 ppm (water ≈ mg/L) ≈ 0.0001 %w/v. Edit either value to convert instantly.
Conversion formula
%w/v = ppm (water ≈ mg/L) × (0.001) × (0.1)1 ppm (water ≈ mg/L) ≈ 0.0001 %w/v
part per million in dilute water (≈ mg/L) (ppm (water ≈ mg/L))
part per million in dilute water (≈ mg/L) is a unit of solution mass concentration: 1 ppm (water ≈ mg/L) ≈ 0.001 kg/m³. This is only an approximation for dilute water with density about 1 kg/L: 1 ppm ≈ 1 mg/L. For other liquids or concentrations, density is required.
Source: USGS PHREEQC: concentration units and solution density
percent mass per volume (%w/v)
percent mass per volume is a unit of solution mass concentration: 1 %w/v = 10 kg/m³. Here 1 %w/v means 1 g of solute per 100 mL of final solution; it is not a mass fraction.
Source: FDA: strength conversion in drug listing, weight in volume
Conversion table
| ppm (water ≈ mg/L) | %w/v |
|---|---|
| ≈ 0.0001 | |
| ≈ 0.0002 | |
| ≈ 0.0005 | |
| ≈ 0.001 | |
| ≈ 0.0015 | |
| ≈ 0.002 | |
| ≈ 0.0025 | |
| ≈ 0.003 | |
| ≈ 0.004 | |
| ≈ 0.0045 |
| ppm (water ≈ mg/L) | %w/v |
|---|---|
| ≈ 0.005 | |
| ≈ 0.006 | |
| ≈ 0.007 | |
| ≈ 0.008 | |
| ≈ 0.009 | |
| ≈ 0.01 | |
| ≈ 0.015 | |
| ≈ 0.016 | |
| ≈ 0.017 | |
| ≈ 0.018 |
Frequently asked questions
How many percent mass per volume are in 1 part per million in dilute water (≈ mg/L)?
1 ppm (water ≈ mg/L) ≈ 0.0001 %w/v. %w/v = ppm (water ≈ mg/L) × (0.001) × (0.1)
How do I convert ppm (water ≈ mg/L) to %w/v?
%w/v = ppm (water ≈ mg/L) × (0.001) × (0.1)
Is 1 part per million in dilute water (≈ mg/L) bigger than 1 percent mass per volume?
1 ppm (water ≈ mg/L) ≈ 0.0001 %w/v.