kmvskmsTell them apart

Quick tell: km is a symbol, kms is an intj, so they fill different roles in a sentence.

Which to use

“km” is a symbol and “kms” is an intj - they look or sound alike but fill different roles in a sentence.

#1,030
“km” frequency rank
#27,107
“kms” frequency rank
28137
confusion score

Side-by-Side Comparison

Feature km kms
Definition Symbole du kilomètre, unité de mesure de longueur du Système international (SI), valant 1000 mètres (10³ mètres). Utilisé pour montrer la frustration.

Letter map: km vs kms

Shared letters muted; letters that set km and kms apart highlighted. Shared run: 2.

2 ch
km
3 ch
kms

Grammar separator: km vs kms

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: km is asymbol and kmsanintj. On the page they differ by 1 extra letter(s) - “km” sits inside “kms”. Our composite confusion score for this pair is 28137, derived from the frequency rank of both members and their visual similarity.

km is recorded at frequency rank #1,030, classified as asymbol. kms is at rank #27,107, tagged as anintj.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 28137, this pair ranks #324,682 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of km vs kms

Shared letters: km. Private to "km": -. Private to "kms": s.

"km" · 2 letters · shape CC  ·  "kms" · 3 letters · shape CCC

Frequently Asked Questions

Can "km" and "kms" be used interchangeably?
No - they are not even the same part of speech. "km" is a symbol and "kms" an intj, so a sentence built for one is usually ungrammatical with the other.
In ordinary French text, does "km" or "kms" show up more?
"km" is the more common of the two: it sits at frequency rank #1,030 in our French list, against #27,107 for "kms". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Done with this confusable. These links stay specific to "km" and "kms".

  • Full dictionary entry for "km" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "kms" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #324,682 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "km" and "kms" also get mixed up with nearby pairs, the highest-scored neighbour is "kms vs ky". Nearby pair

Confusion rank #324,682 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list