ell vs em, What's the Difference?

Which to use

“ell” and “em” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#29,255
“ell” frequency rank: #2,623
“em” frequency rank: 31878
confusion score

Side-by-Side Comparison

Feature	ell	em
Definition	A measure of length. An English ell was 1¼ yards (45 inches or 114 cm), a Scottish ell was about 37 inches (94 cm), a Flemish ell was ¾ yard (27 inches or 69 cm), while certain European ells were less than 50 cm.	The name of the Latin script letter M/m.

Where the eye mixes ell and em

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch

ell

2 ch

Visual trap between ell and em

A purely visual mix-up. ell (/ˈɛl/) and em (/ˈɛm/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 31878, derived from the frequency rank of both members and their visual similarity.

ell is recorded at frequency rank #29,255, classified as anoun, pronounced /ˈɛl/. em is at rank #2,623, tagged as anoun, pronounced /ˈɛm/.

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 31878, this pair ranks #342,473 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of ell vs em

Shared letters: e. Private to "ell": l. Private to "em": m.

"ell" · 3 letters · shape VCC · "em" · 2 letters · shape VC

Frequently Asked Questions

Is swapping "ell" for "em" ever safe?

No. They are said differently (/ˈɛl/ versus /ˈɛm/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

Frequency check: "ell" vs "em" - which ranks higher?

"em" is the more common of the two: it sits at frequency rank #2,623 in our English list, against #29,255 for "ell". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Eye-level mix-up between "ell" and "em" is sorted above. Next: full entries or other pairs that share a letter shape.

Full dictionary entry for "ell" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "em" - compare definitions side by side with the headword page. Word entry
This pair ranks #342,473 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"ell" and "em" also get mixed up with nearby pairs, the highest-scored neighbour is "ell vs Eri". Nearby pair

Confusion rank #342,473 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.