PPM to mg/L Converter

Convert parts per million to milligrams per liter instantly

Parts Per Million (PPM)

Milligram per Liter (mg/L)

Formula: mg/L = PPM × 1

Note: For aqueous solutions: 1 PPM = 1 mg/L

About Parts Per Million (PPM)

PPM is a unit of concentration expressing the ratio of one part substance to one million parts total.

Dimensionless unit of concentration
Used in environmental monitoring
Common in water quality analysis
1 PPM = 1/1,000,000

About Milligram per Liter (mg/L)

mg/L is a unit of concentration expressing mass per unit volume.

Mass concentration unit
Standard in laboratory analysis
Used in chemical and medical testing
Equivalent to PPM for water solutions

Conversion Examples

PPM	mg/L	Use Case
1 PPM	1 mg/L	Trace contamination
10 PPM	10 mg/L	Chlorine in pools
100 PPM	100 mg/L	Water hardness
1,000 PPM	1,000 mg/L	Salt concentration

Conversion Formula & Notes

Formula (Aqueous Solutions)

mg/L = PPM × 1

PPM = mg/L × 1

*For water at standard conditions

Important Notes

• Valid for aqueous solutions only
• Assumes solution density ≈ 1 g/mL
• Temperature and pressure dependent
• Used in environmental monitoring

Important: This conversion is valid for aqueous solutions where the solution density is approximately 1 g/mL. For non-aqueous solutions or solutions with significantly different densities, the conversion factor may differ.