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I am writing my Master Thesis memory and I have come up with a doubt, how should I write 1 megahertz: 1MHz (without space) or 1 MHz (with space)?

I searched on the internet, on papers and books, and I have found it written in both ways. Which should I use?

DaDSPGuy
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    one word: siunitx, it is with a small space (not word space) – daleif Jun 07 '19 at 11:56
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    I'm voting to close this question as off-topic because it is a question about which notation to use. Questions about notation are only on-topic if you know which notation you need to write and you want to know how to render such a notation in LaTeX. – Marijn Jun 07 '19 at 11:58
  • And, for your reference, https://www.bipm.org/utils/common/pdf/si-brochure/SI-Brochure-9-EN.pdf – jak123 Jun 07 '19 at 11:59
  • Or https://english.stackexchange.com/questions/2794/punctuation-with-units for a more informal explanation. – Marijn Jun 07 '19 at 12:00
  • International standards are never wrong: https://physics.nist.gov/cuu/Units/bibliography.html – Sveinung Jun 07 '19 at 20:46

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The most secure way is to do it with siunitx: the macro \SI{1}{\MHz} will typeset it correctly, with a thin space between the number and the unit, and no space inside the unit.

Bernard
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