-3
$\begingroup$

Please help me converting 40 ppt to pg/mL. I have tried an online calculator and done it manually and there are differences. I`m aware that ppt can be used as parts per trillion or per thousand but I don´t understand where the difference is coming from. The calculator is http://www.endmemo.com/sconvert/pg_mlppt.php

Thanks,

Improve this question
$\endgroup$
3
  • 3
    $\begingroup$ You wrote that you did it manually. Could you please edit your question and show what you've done so far? That wound help to get an idea where the problem arises... $\endgroup$
    – Arsak
    Jan 9, 2020 at 22:03
  • $\begingroup$ Check out picotrillion.com $\endgroup$
    – Karsten ♦
    Jan 9, 2020 at 23:10
  • $\begingroup$ By manually I mean thinking automatically 40 pg/mL is equal to 40 ppt . Thanks someone just confirmed that the online converter is broken so my calculation is ok. $\endgroup$
    – Alicia Marroquin
    Jan 10, 2020 at 18:59

1 Answer 1

Reset to default
1
$\begingroup$

You are in luck. The converter is broken, so it gave you the wrong answer:

enter image description here

It does fine with ppm and ppb, but conversions to and from ppt seem to be broken. A trillion can mean ten to the twelve (conventional), a lot (informal), or ten to the eighteen (dated, British) according to lexico.com.

Improve this answer
$\endgroup$

Not the answer you're looking for? Browse other questions tagged or ask your own question.