This is a continuation of a long topic, addressed by post number rather than by page. Start at post 1.
Post #150 put the caveat in the right place and I want to underline it.
Precision and significant figures: the calculators do not round to match your input precision. If you input values to one decimal place, the output might have more. Use significant figures appropriate to your input precision.
I would want a second opinion before relying on that.
If you are new and reading this thread for the answer to mass-error checker: the answer is conditional, the conditions are in the third reply, and the rest of the thread is worth skipping.
Offering a way to settle mass-error checker rather than another opinion about it. Two measurements, taken the same way, a fortnight apart. If the difference is within the noise, the question was not answerable at this precision.
Significant figures in the output should not exceed what the inputs support. A concentration calculated from a nominal vial mass is not known to four decimal places.
Where I part company with post #154, and it is a narrow parting.
The calculators maintained on this site are open-source and verifiable. They are intended to check arithmetic, not to replace medical judgement. Using them is optional and they are provided for convenience.
Post #154 is the version of this I will quote in future. One addition.
Second-hand on mass-error checker, so weight it accordingly — someone whose method I trust told me this and I have not verified it myself.
Tools that run entirely in the browser send nothing anywhere, which matters more to some people here than others and is worth stating either way.
Building on post #159 rather than restating it.
Taking mass-error checker seriously for a moment rather than deflecting: the honest position is that the community has observations and no controlled comparison, and those two things support very different sentences.
Good question, well framed, and I would like to see it answered properly.
Marking my uncertainty on mass-error checker explicitly. I am confident about the direction, much less confident about the size, and not confident at all that it generalises past the case in the first post.
Answering the question post #160 raises rather than the one it answers.
Dose equivalence calculator: compounds have different potencies. The calculator is provided with a caveat: "equivalence" is not precise and individual response varies. It is a rough starting point, not a dose prescription.
Agreed on mass-error checker, with one qualification that I think matters. The reasoning holds for the case as described. Change the starting assumption and it does not, and the starting assumption is the part nobody states.
Adding the measurement that post #165 says would settle it.
A calculator that shows its working is worth ten that give an answer. The whole value is being able to see which step you disagree with.
Post #164 describes the usual case. This is about the unusual one.
A methods point on mass-error checker rather than a substantive one: if the comparison is not like for like, the difference you are measuring is the difference in method.
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