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PPM Calculator

mg/L = solute mg ÷ solution L; ppm assumes density 1 kg/L

Method / formulamg/L = solute mg ÷ solution L; ppm assumes density 1 kg/L

Keep units consistent. Record assumptions and independently verify critical results.

INPUT DATA

Enter calculation values

Select the unit for each measurement. Compatible values are converted automatically before calculation.

CALCULATED RESULT—

The result updates as valid values are entered.

Unit handlingCompatible units are normalized internally. Confirm units, assumptions and significant figures before use.

CALCULATION GUIDE

Understand your calculation

Clear inputs, a practical example and the context you need to interpret your result.

How it works

Converts solute mass to mg and solution volume to L, then divides mass by volume.

Inputs and units

Enter nonnegative mass in ug, mg or g and positive final volume in mL or L.

Worked example

2 mg ÷ 0.5 L = 4.0000 mg/L, approximately 4 ppm if solution density is 1 kg/L.

Interpreting the result

The direct result is mg/L. Mass-based ppm is mg/kg; divide mg/L by density in kg/L to obtain mg/kg.

Assumptions and limitations

Density is not an input. Do not use the approximate ppm label for dense solutions, gases or mass/mass calculations without the required conversion.