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Concentration

ppmtoppt

Convert parts per million (10⁻⁶) (ppm) to parts per trillion (10⁻¹²) (ppt).

Factor1 ppm = 1000000 ppt

Converter

ppm

Accepts numbers or expressions, e.g. 150 + 14.7

Result
1.00000e+6ppt

Rendered to 6 significant figures.

Formula

Formula
ppt = ppm × 1000000

Multiply any value in parts per million (10⁻⁶) by 1000000 to obtain the value in parts per trillion (10⁻¹²).

Worked example

Convert 1 ppm to ppt.

  1. 01Start with 1 ppm.
  2. 02Multiply by the conversion factor: 1 × 1000000 = 1.00000e+6 ppt.
Result1 ppm = 1.00000e+6 ppt

Conversion table

ppmppt
11.0000e+6
22.0000e+6
55.0000e+6
101e+7
202e+7
505e+7
1001e+8
2002e+8
5005e+8
10001e+9

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from ppm to ppt?
1 ppm equals 1000000 ppt. To convert, multiply the value in parts per million (10⁻⁶) by 1000000.
How do I convert 1 ppm to ppt?
1 ppm = 1.00000e+6 ppt. For any value, multiply by 1000000.
How do I convert ppt back to ppm?
Divide by the same factor — or equivalently, multiply by 1e-6. So 1 ppt = 1e-6 ppm.
When would I need to convert parts per million (10⁻⁶) to parts per trillion (10⁻¹²)?
Concentration-ratio conversions between ppm and ppt are used in trace-analysis, gas-composition work, environmental reporting and process-chemistry datasheets. These conversions are dimensionless: they do NOT cover mg/L, g/L, mol/L, normality, equivalents, mass-percent, volume-percent, ppmw or ppmv — those require solution density and/or molecular weight. Note: ppt here means parts per trillion (10⁻¹²), not parts per thousand.
Is the conversion exact?
Yes. Both ppm and ppt are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).

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