Parts per million (ppm, ≈mg/L in aqueous solution) to Parts per billion (ppb, ≈µg/L in aqueous solution) Converter

1 Parts per million (ppm, ≈mg/L in aqueous solution) is equal to 1000 Parts per billion (ppb, ≈µg/L in aqueous solution). To convert Parts per million (ppm, ≈mg/L in aqueous solution) to Parts per billion (ppb, ≈µg/L in aqueous solution), multiply the value by 1000.

The formula is: ppb = ppm x 1000. You can also divide the ppm value by 0.001 to get the same result.

1 Parts per billion (ppb, ≈µg/L in aqueous solution) is equal to 0.001 Parts per million (ppm, ≈mg/L in aqueous solution). This is the inverse of the Parts per million (ppm, ≈mg/L in aqueous solution) to Parts per billion (ppb, ≈µg/L in aqueous solution) conversion.

The conversion factor used is 1 Parts per million (ppm, ≈mg/L in aqueous solution) = 1000 Parts per billion (ppb, ≈µg/L in aqueous solution). For most practical purposes, this provides highly accurate results. Our converter uses standard internationally recognized conversion factors.

To convert Parts per billion (ppb, ≈µg/L in aqueous solution) to Parts per million (ppm, ≈mg/L in aqueous solution), multiply the Parts per billion (ppb, ≈µg/L in aqueous solution) value by 0.001. Or use our converter above and click the swap button.