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PPB to μg/L and μg/L to PPB Calculator

How to Calculate Between PPB and μg/L

The PPB to μg/L and μg/L to PPB Calculator converts between parts per billion (PPB) and micrograms per liter (μg/L) for water solutions. The conversion is direct:

\( 1 \, \text{PPB} = 1 \, \mu g/L \)
\( 1 \, \mu g/L = 1 \, \text{PPB} \)

Where:

  • \( PPB \): Parts per billion, a dimensionless ratio of concentration.
  • \( \mu g/L \): Micrograms per liter, a mass per volume concentration unit.

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

Note: In water solutions, 1 PPB equals 1 μg/L because 1 liter of water weighs approximately 1 kilogram, making the conversion 1:1.

Using the PPB and μg/L Mutual Conversion Calculator

This calculator is useful for environmental and chemical analysis, such as measuring pollutants or contaminants in water, supporting bidirectional conversions.

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

Example 1: For a concentration of 200 PPB to μg/L.


  1. Direction: PPB to μg/L
  2. Input: \( 200 \)
  3. Calculation: \( \mu g/L = 200 \times 1 = 200 \)
  4. Result: \( 200 \, \text{μg/L} \)

Example 2: For a concentration of 150 μg/L to PPB.


  1. Direction: μg/L to PPB
  2. Input: \( 150 \)
  3. Calculation: \( PPB = 150 \times 1 = 150 \)
  4. Result: \( 150 \, \text{PPB} \)

Use this tool for quick bidirectional conversions in water quality analysis.

Common FAQ

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

  • Q: What is PPB?
    A: PPB stands for parts per billion, a dimensionless ratio used for low concentrations.
  • Q: What is μg/L?
    A: μg/L stands for micrograms per liter, a unit measuring mass concentration in water.
  • Q: Why is 1 PPB equal to 1 μg/L?
    A: In water, 1 PPB equals 1 μg/L because 1 liter of water weighs approximately 1 kg, making the mass-to-volume ratio equivalent.
  • Q: How accurate is this calculator?
    A: It provides precise results based on the 1:1 conversion, 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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