formulavsPlanckTell them apart

Quick tell: formula is a noun, Planck is a name, so they fill different roles in a sentence.

Which to use

“formula” is a noun and “Planck” is a name - they look or sound alike but fill different roles in a sentence.

#38,745
“formula” frequency rank
#15,968
“Planck” frequency rank
54713
confusion score

Side-by-Side Comparison

Feature formula Planck
Definition die Formel deutscher Nachname, Familienname

Letter map: formula vs Planck

Shared letters muted; letters that set formula and Planck apart highlighted. Shared run: 2. formula runs 7 letters (CVCCVCV) against Planck's 6 (CCVCCC) - the length gap alone is often enough to separate them once you know to check it.

7 ch
formula
6 ch
Planck

Grammar separator: formula vs Planck

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: formula is anoun and Planckaname. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 54713, derived from the frequency rank of both members and their visual similarity.

formula is recorded at frequency rank #38,745, classified as anoun, pronounced […]. Planck is at rank #15,968, tagged as aname, pronounced […].

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 54713, this pair ranks #1,008,075 of 2,006,359 scored German confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of formula vs Planck

Shared letters: al. Private to "formula": fmoru. Private to "Planck": cknp.

"formula" · 7 letters · shape CVCCVCV  ·  "Planck" · 6 letters · shape CCVCCC

Known mistypes of this pair

  • formula ← fformula · fomrula · formlua · formmula · formual · formulla · forrmula · forumla
  • Planck ← lpanck · palnck · placnk · plancck · planckk · plankc · plannck · pllanck

Frequently Asked Questions

Is swapping "formula" for "Planck" ever safe?
No - they are not even the same part of speech. "formula" is a noun and "Planck" a name, so a sentence built for one is usually ungrammatical with the other.
In ordinary German text, does "formula" or "Planck" show up more?
"Planck" is the more common of the two: it sits at frequency rank #15,968 in our German list, against #38,745 for "formula". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Done with this confusable. These links stay specific to "formula" and "Planck".

  • Full dictionary entry for "formula" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Planck" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #1,008,075 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "formula" and "Planck" also get mixed up with nearby pairs, the highest-scored neighbour is "formula vs puzzles". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #1,008,075 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list