Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
certain as
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "certain as" is correct and usable in written English.
It can be used to express a strong conviction or assurance about something, often in a comparative context. Example: "I am certain as the sun rises that we will succeed in our endeavors."
✓ Grammatically correct
News & Media
Science
Alternative expressions(6)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
57 human-written examples
"It's less certain as a poet.
News & Media
American military intervention in that country is therefore almost certain as well.
News & Media
One thing is certain: as much as Mr. Bush likes his ranch, he likes winning more.
News & Media
After Wednesday's vote, their confirmations by the full Senate seems certain as soon as next week.
News & Media
As certain as she could be.
News & Media
Others are not as certain as Calcavecchia.
News & Media
Two things, though, are as certain as can be.
News & Media
Street protests are as certain as a sunrise.
News & Media
That may be as certain as we ever can be.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
2 human-written examples
The economic prize of globalisation and the huge new prize in Asia seems as certain as anything.
News & Media
It is not entirely certain as to which variable indicates tumour recurrence for the individual patient.
Science
Expert writing Tips
Best practice
Use "certain as" to emphasize a strong belief or expectation, often by comparing it to something universally accepted or highly probable. This can add rhetorical flair to your writing.
Common error
Avoid pairing "certain as" with predictable comparisons (e.g., death and taxes) too frequently, as this can diminish the impact of your writing. Opt for fresh, relevant analogies.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "certain as" functions primarily as an intensifier, adding emphasis to a statement by comparing it to something that is considered undeniably true or highly probable. It helps to convey a sense of confidence or assurance.
Frequent in
News & Media
60%
Science
20%
Formal & Business
10%
Less common in
Wiki
5%
Encyclopedias
3%
Social Media
2%
Ludwig's WRAP-UP
In summary, the phrase "certain as" is a grammatically correct and frequently used expression for conveying strong conviction or assurance by comparing a statement to an established certainty. Ludwig AI indicates that while versatile, it's most commonly found in news and media contexts. To avoid clichés, it's recommended to use fresh and relevant comparisons. Alternatives like "sure as" offer similar meanings with slight differences in tone and emphasis, providing writers with choices to best suit their communicative needs.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
sure as
This alternative is a more concise and equally common way to express certainty.
guaranteed as
This alternative emphasizes the aspect of a guarantee or a firm promise.
inevitable as
This alternative shifts the focus to the unavoidable nature of the outcome.
unquestionable as
This alternative highlights the lack of doubt or dispute surrounding the situation.
certain like
This alternative is a more direct comparison to something known to be certain.
assured as
This alternative focuses on the feeling of confidence in the outcome.
as certain that
This alternative rephrases the sentence structure to emphasize the certainty.
with certainty
This alternative expresses confidence without making a comparison.
beyond doubt
This alternative replaces the comparative aspect with the absence of doubt.
undeniably
This alternative is a simple adverb expressing certainty without a comparison.
FAQs
How can I use "certain as" in a sentence?
You can use "certain as" to express a strong conviction or expectation by comparing something to a well-known certainty. For example, "The sun will rise tomorrow, as certain as night follows day."
What phrases are similar to "certain as"?
Alternatives to "certain as" include "sure as", "guaranteed as", and "inevitable as", each offering a slightly different nuance in conveying assurance.
Is it always appropriate to use "certain as"?
While grammatically correct, using "certain as" may sound somewhat formal or emphatic. Consider your audience and the overall tone of your writing to ensure it fits appropriately. In some contexts, a simpler expression of certainty might be preferable.
What's the difference between "certain as" and "sure as"?
The phrases "certain as" and "sure as" are largely interchangeable. "Certain as" might carry a slightly more formal tone, but both are commonly used to express confidence in a comparative manner.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested