PPM to Parts per Trillion Converter
Common Conversions
| ppm | ppt |
|---|---|
| 0.000001 | 1 |
| 0.00001 | 10 |
| 0.0001 | 100 |
| 0.001 | 1000 |
| 0.01 | 10000 |
| 0.1 | 100000 |
| 1 | 1000000 |
| 5 | 5000000 |
| 10 | 10000000 |
| 100 | 100000000 |
| 1000 | 1000000000 |
| 10000 | 10000000000 |
Why this conversion matters in chemistry
Semiconductor ultrapure-water purity grading is a worked example. A boiler-feedwater silica spec of 0.1 ppm becomes 100,000 ppt — six orders of magnitude above the metallic-ion specification (under 10 ppt) for a sub-7nm fabrication line per SEMI F63 ultrapure-water standards. The conversion illustrates the purity-upgrade gap between industrial and semiconductor process water. That 10⁶ ppt per ppm is the prefix difference between million and trillion, no more.
Formula
ppt = ppm × 10⁶
Worked Examples
1 ppm = 1000000 ppt
The conversion anchor — six prefix decades, the full span of the relationship.
0.001 ppm = 1000 ppt
1 ppb — the bridge step between trace and ultratrace regimes.
0.000001 ppm = 1 ppt
A single ppt — about a typical ultrapure-water specification floor.
100 ppm = 100000000 ppt
100 ppm — about a moderate industrial-process concentration in ppt form.
Frequently Asked Questions
How do I convert ppm to ppt?
Multiply by 10⁶ (one million). So 1 ppm becomes 10⁶ ppt. The relationship is exact through two prefix steps.
What's the full concentration hierarchy?
% > ppm > ppb > ppt > ppq. Each step scales by 1000 going down (or ÷1000 going up). The chain extends through ppq (parts per quadrillion) for the lowest detection regimes.
When would I express ppm as ppt?
Rarely as a single-step calculation, but useful for visualizing the dynamic range between industrial-process and ultratrace specifications. PPT is reserved for genuinely ultra-trace measurements where the underlying matrix is essentially analyte-free.