1 to 4-fold / 1- to 4-fold [hyphen]


Senior Member
British English
Hello everyone.

Lets say there is an increase in the rate of a reaction, and it increases from 1 to 4-fold. I am confused as to the placing of the hyphen is it

1 to 4-fold
1- to 4-fold
1-to 4-fold

You get the idea.
Incidentally, the client is American so if there is a difference in Uk/American English and you know about it..... you know the procedure.

Many thanks ppl

  • CurrantBunbury

    English - United Kingdom
    I'd agree with that. I don't know about the current style either, but it seems the only reasonable option. What you're saying is: "the reaction increases from 1-fold to 4-fold", omitting the first 'fold'. The rest of your sentence has to behave as if the 'fold' hadn't been omitted, so the hyphen stays.


    Senior Member
    British English
    Ok thanks, I'm going to trust you. It seems logical.
    Thanks for your input.



    Senior Member
    English - US
    I'm troubled by one-fold in general (something is one times itself - what a tautological thing to say and I am one-fold in that!) and by the use of -fold in a scientific context. To me, it seems vague and old-fashioned at the same time.


    Senior Member
    English (UK then US)
    "The rate of reaction increases one-fold." This does not make logical sense.

    "The rate of reaction doubled". That would make logical sense.

    "It increases from one-fold to something bigger" makes the same logical mis-step.

    "The rate increased from one to four". This could make sense if the units of measure had already been made clear.

    If the estimates of the increase in rate of reaction ranged from 1=one fold (i.e. no change) to 4 fold, then the best way might be to say
    "The rate of reaction increased up to four fold."

    The surrounding text (aka context) might help us understand. I am confused by such ambiguous wording.


    Senior Member
    Like other posters, I'm confused about this sentence.

    Saying that something increased "four-fold" means that it quadrupled. For example, the rate of reaction is 2. If it increases four-fold, then the new rate of reaction is 8. If it increases from 1 to 4, then you just say "it increases four-fold."

    I can't imagine a situation where you would need from X to Y-fold.
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