PPB to PPM converter (ppb to ppm)
Convert PPB (ppb) to PPM (ppm) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
How to convert PPB to PPM
1 ppb = 0.001 ppm.
ppm = ppb × 0.001
Multiply ppb by 0.001:
Example: Convert 1000 ppb to ppm:
1000 × 0.001 = 1 ppm
What is a PPB?
The PPB (ppb) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
What is a PPM?
The PPM (ppm) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
This page converts number systems from PPB into PPM. One ppb equals 0.001 ppm.
PPB to PPM conversion table
Common ppb values and the matching ppm result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| PPB (ppb) | PPM (ppm) |
|---|---|
| 1 ppb | 0.001 ppm |
| 10 ppb | 0.01 ppm |
| 100 ppb | 0.1 ppm |
| 1000 ppb | 1 ppm |
| 10000 ppb | 10 ppm |
| 100000 ppb | 100 ppm |
How this calculator works
The form on this page is a PPB-to-PPM converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the ppm result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many ppm are in 1 ppb?
1 ppb = 0.001 ppm.
How do I convert PPB to PPM?
Multiply ppb by 0.001:
Is this ppb to ppm converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.