Methodology
For factor-based categories, values pass through the configured base unit: base value = input value × source factor, then output value = base value ÷ target factor.
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Engineering Tool · Instrumentation & Digital
Concentration Unit Converter
Instantly convert between mg/L, ppm, and other Concentration units — accurate, free, and built for water treatment engineering work.
ENGINEERING TOOLS
Concentration
6 units
Concentration — Unit Converter
6 units available
Quick Reference Table
| Unit | Converted to mg/L | mg/L converted to unit |
|---|---|---|
| ppm | 1 ppm = 1 mg/L | 1 mg/L = 1 ppm |
| ppb | 1 ppb = 0.001 mg/L | 1 mg/L = 1000 ppb |
| g/L | 1 g/L = 1000 mg/L | 1 mg/L = 0.001 g/L |
| % (wt) | 1 % (wt) = 10000 mg/L | 1 mg/L = 0.0001 % (wt) |
| grains/gal (US) | 1 grains/gal (US) = 17.118 mg/L | 1 mg/L = 0.058418 grains/gal (US) |
01
Engineering Basis
Assumptions
- Convert only between units in the same physical quantity family and with the same declared concentration or operating basis.
- mg/L and ppm are treated as numerically equal only for dilute aqueous solutions at approximately 1 kg/L density; concentrated brines can differ.
Scope / Limitations
- The converter normalizes units; it does not validate source data, infer a process basis, or replace the assumptions of a downstream model.
02
Engineering Path
Upstream Context
- Declared value and source unit Use the unit stated on the sample record, supplier sheet, or design note.
Current Tool Decision
- Concentration Unit Converter Convert within this quantity family while preserving the declared engineering basis.
Downstream Engineering Step
- Chemical Dosing Basis Calculator Use the normalized value in the relevant engineering calculation and verify its basis.
- Chemical Feed & Storage Designer Use the normalized value in the relevant engineering calculation and verify its basis.
- Chlorine / Chloramine CT & Residual Designer Use the normalized value in the relevant engineering calculation and verify its basis.