I don't know which shortened form of "10 or more" is more appropriate, is it 10+ or 10+ (i.e. with the plus sign as superscript). What do you think?

Extra question, when do we use superscript in English,well, aside from ordinal numbers and references?

  • Neither variant has currency in formal official writing that I'm aware of. 10+, "ten plus" is understood in informal shorthand, chat and the like. What context do you have in mind? Super- and subscript are imitations of hand-written shorthand that has little connection to chat shorthand, probably only used by geeks. +1 "plus one" has become an idiom for "you and and one more"; "ten plus" doesn't strike me as a probable verbal idiom, rather a purely technical symbolism. 10 to the power of plus is effectively 10x, the multiplicative series of ten, in some algebraic notation.
    – vectory
    Sep 6, 2019 at 18:40
  • >=10 is what I’d use as shorthand.
    – Xanne
    Sep 6, 2019 at 18:51
  • "10+" is shorthand for "ten plus," not "10 or more." That said, "10+" is always what you'd write to mean that, never superscript. Sep 7, 2019 at 0:22

2 Answers 2


10+ is sometimes used as a shorthand for 10 or more. Do not superscript the +.

A superscript + is normally only used for positively charged ions or particles: H+ for hydrogen ions, Na+ for natrium ions, K+ for potassium ions, Zn2+ for zinc ions, H3O+ for hydronium ions, NH4+ for ammonium ions, e+ for positrons, μ+ for antimuons.

Otherwise, superscripts are used:

  • in mathematics, for exponents: 106 is a million, 1 m2 is a squared metre
  • for footnotes
  • for the abbreviations TM (trade mark) and SM (service mark) following a trade mark or a service mark
  • for digits behind the decimal point or comma: $1.50
  • for the final letters of ordinals: 1st, 2nd, 3rd, 4th
  • for the final letters of abbreviations that contain the first and final letters: Mlle for mademoiselle, Mr for monsieur or mister, Dr for doctor

Modern style guides advise against the use of superscripts in the last three points.


I have not seen that usage of 10+ with a superscript as 10+.

Wikipedia says in Subscript and superscript

In English, most nontechnical use of superiors is archaic.

although I do still see (and sometimes use) superscript for ordinals like 10th.

But it comes down to a matter of preferred style.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

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