PPM to mg/L Converter
Concentration Conversion Results
Milligrams per Liter (mg/L)
Enter a concentration to convert
--
Primary Units
PPM
--
Parts per million
mg/L
--
Milligrams per liter
μg/mL
--
Micrograms per milliliter
Related Units
PPB
--
Parts per billion
μg/L
--
Micrograms per liter
g/m³
--
Grams per cubic meter
Percentage & Mass
Percentage
--
Weight percentage
Mass Fraction
--
Dimensionless ratio
Mass per Volume
--
Actual density contribution
PPM ↔ mg/L Reference
Pure water: 1 PPM = 1 mg/L
Seawater: 1 PPM ≈ 1.025 mg/L
Temperature: Affects density
Salinity: Increases density
Standard conditions: 20°C, 1 atm
Lab accuracy: ±0.1% typical
Field testing: ±1-5% typical
Calibration: Critical for accuracy
1 mg/L = 1000 μg/L
1 PPM = 1000 PPB
Mass basis: More accurate
Volume basis: Temperature dependent
Quick Reference
What this tool does
PPM to mg/L Converter
Professional PPM to mg/L converter for water quality concentration units. Convert parts per million to milligrams per liter for accurate water analysis and testing.
How the calculation works
Enter a value, choose the relevant units, and the tool applies the standard relationship between those units to calculate the result.
Part of Digital & Technical Conversion Tools.
Related tools