Concentration Converter Calculator

Work out concentration converter instantly with clear inputs, formula shown and shareable results.

About Concentration Converter Calculator

Each concentration unit is defined as a multiple of the milligram per litre, so the conversion runs in two steps: multiply by the source unit's factor to reach milligram per litre, then divide by the target unit's factor. One factor per unit covers every pair in the list. For dilute aqueous solutions 1 mg/L equals 1 ppm because a litre of water weighs a kilogram. That equivalence fails for other solvents.

Formulas

Two-step conversion

result = value × factor(from) ÷ factor(to)

Base value

base (milligram per litre) = value × factor(from)

Worked example

With the default values below, Concentration Converter Calculator returns Converted Value of 250.00000000. Change any input above and every figure here is recalculated in your browser.

Inputs used

Value: 250
From unitone of Milligram per litre (mg/L), Gram per litre (g/L), Microgram per litre (ug/L), Parts per million (dilute aqueous), Parts per billion (dilute aqueous), Percent by mass per volume (g/100 mL), Gram per cubic metre (g/m3): Milligram per litre (mg/L)
To unitone of Milligram per litre (mg/L), Gram per litre (g/L), Microgram per litre (ug/L), Parts per million (dilute aqueous), Parts per billion (dilute aqueous), Percent by mass per volume (g/100 mL), Gram per cubic metre (g/m3): Parts per million (dilute aqueous)

Results

Converted Value: 250.00000000
Result Unit: Parts per million (dilute aqueous)
Value in milligram per litre (base): 250.00000000
Multiplier Applied: 1.00000000

Step by step

1Values used
2Two-step conversion
3Base value
4Converted Value= 250.00000000
5Result Unit= Parts per million (dilute aqueous)
6Value in milligram per litre (base)= 250.00000000
7Multiplier Applied= 1.00000000

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 8 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why route through milligram per litre?

With 7 units, direct pairs would mean 42 factors to maintain. Going via milligram per litre needs one factor per unit and gives the same answer.

Does the dropdown order matter?

Yes. The first is the unit your figure is already in; the second is what you want it in. Swapping them inverts the result.