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μg/L to PPM and PPM to μg/L Calculator

How to Calculate Between μg/L and PPM

The μg/L to PPM and PPM to μg/L Calculator converts between micrograms per liter (μg/L) and parts per million (PPM) for water solutions. The formulas are:

\( PPM = \frac{\mu g/L}{1000} \)
\( \mu g/L = PPM \times 1000 \)

Where:

  • \( PPM \): Parts per million, a unit of concentration.
  • \( \mu g/L \): Micrograms per liter, a measure of mass per volume.

Select the conversion direction, enter the input value, and calculate the result.

Using the μg/L and PPM Mutual Conversion Calculator

This calculator is useful for water quality analysis, such as measuring contaminants or dissolved substances in water, supporting bidirectional conversions.

Select the direction (μg/L to PPM or PPM to μg/L), input the concentration value. The calculator outputs the converted value.

Example 1: For a concentration of 1200 μg/L to PPM.


  1. Direction: μg/L to PPM
  2. Input: \( 1200 \)
  3. Calculation: \( PPM = 1200 / 1000 = 1.2 \)
  4. Result: \( 1.2 \, \text{PPM} \)

Example 2: For a concentration of 0.55 PPM to μg/L.


  1. Direction: PPM to μg/L
  2. Input: \( 0.55 \)
  3. Calculation: \( \mu g/L = 0.55 \times 1000 = 550 \)
  4. Result: \( 550 \, \text{μg/L} \)

Use this tool for quick bidirectional conversions in environmental or chemical analysis.

Common FAQ

Below are frequently asked questions about μg/L and PPM conversions:

  • Q: What is μg/L?
    A: μg/L stands for micrograms per liter, a unit measuring mass concentration in water.
  • Q: What is PPM?
    A: PPM stands for parts per million, a unit of concentration equivalent to mg/L in water.
  • Q: Is the conversion always 1 μg/L = 0.001 PPM?
    A: Yes, for water solutions where 1 PPM = 1 mg/L, and 1 mg/L = 1000 μg/L.
  • Q: How accurate is this calculator?
    A: It provides precise results based on the formulas, rounded to 3 decimal places.
  • Q: Can negative values be used?
    A: No, input values must be positive; invalid inputs leave the result blank.
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