ppm to ppb Converter - Parts per million to Parts per billion

Parts per million (ppm) to Parts per billion (ppb)

Direct answer

1 ppm = 1,000 ppb

ppb = ppm × 1,000

Converter

Input

ppm

Result

1,000ppb

ppb = ppm × 1,000

ppm = ppb × 0.001

Example: 10 ppm = 10 × 1,000 = 10,000 ppb.

Note: this conversion depends on a specific unit definition or physical assumption. Check the context before using it in reports.

Express both ppm and ppb in the same base unit mol/L (molar), then cancel the shared base unit.

1
Rewrite ppm in the base unit
$1 ppm = 0.000001 mol/L$
2
Rewrite ppb in the base unit
$1 ppb = 1 \times 1 0^{- 9} mol/L$
3
Forward conversion
$1 ppm = \frac{0.000001 mol/L}{1 \times 1 0 ^{- 9} mol/L} \times 1 ppb = \frac{0.000001}{1 \times 1 0 ^{- 9}} ppb = 1, 000 ppb$
4
Reverse conversion
$1 ppb = \frac{1 \times 1 0 ^{- 9} mol/L}{0.000001 mol/L} \times 1 ppm = \frac{1 \times 1 0 ^{- 9}}{0.000001} ppm = 0.001 ppm$

1 ppm = 1,000 ppb.

10 ppm = 10,000 ppb.

100 ppm = 100,000 ppb.

Use ppb = ppm × 1,000.

1 ppb = 0.001 ppm.

Note: this conversion depends on a specific unit definition or physical assumption. Check the context before using it in reports.