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
per this
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "per this" is correct and usable in written English.
It is typically used to refer to a document, statement, or previous communication as a basis for the following information or action. Example: "Per this email, we will proceed with the project timeline as discussed."
✓ Grammatically correct
Science
News & Media
Formal & Business
Alternative expressions(20)
according to this
based on this
as stated in this
in accordance with this
pursuant to this
following this
by virtue of this
in light of this
is equivalent to
in the wishes of
rapidly thereafter
for the immediate future
Very soon
somewhere later
one week before
at the early time
in the next weeks
during the previous years
it is important to remember
to avoid disruption
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
60 human-written examples
Note that, for low values of packet error rate (PER), this assumption is reasonable for small values of k, as shown in [33].
In summary, an odor presented 15 s after sucrose feeding can terminate the ongoing PER: this is the olfactory interference effect (see supplementary Movie S1).
Science
A song clearly made for barbie/towel action, as per this picture.
News & Media
As per this Edinburgh Evening News article, it turns out Rankin has recently turned his hand to standup.
News & Media
Per this higher standard, you could have reunited this lost ball with its easily identified owner, and so you should have.
News & Media
Table 2 summarizes various stages as per this framework.
Per this AT&T slide from a few weeks ago.
News & Media
That is, any theorem of SDL is valid per this semantics (soundness), and any formula valid per this semantics is a theorem of SDL (completeness).
Science
The classes 1 and 2 are taken as per this standard in this study.
Science
Per this criterion, total of 52 group reports were retrieved from the two study regions.
Science
As per this classification, 22.2 % samples for both seasons were found to be permissible for drinking.
Science
Expert writing Tips
Best practice
Use "per this" to clearly and concisely indicate that your statement is based on a specific source, such as a document or prior communication.
Common error
Avoid using "per this" in very informal settings like casual conversations; opt for simpler alternatives such as "according to this" or "based on this" for a more natural tone.
Source & Trust
80%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "per this" functions as a prepositional phrase that introduces information derived from a specified source. Ludwig AI confirms its correct usage as a means of referencing documents or statements.
Frequent in
Science
43%
News & Media
28%
Formal & Business
28%
Less common in
Wiki
3%
Encyclopedias
0%
Social Media
0%
Ludwig's WRAP-UP
The phrase "per this" is a useful tool for referencing specific sources of information in writing. According to Ludwig AI, this phrase is grammatically correct and functions as a prepositional phrase. It's common in science, news media, and formal business contexts, as seen in various examples. While versatile, avoid overusing it in very informal situations. For alternatives, consider "according to this" or "based on this". Remember that Ludwig provides these insights to help you use "per this" effectively in your writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
according to this
Replaces "per" with "according to", emphasizing the source of information.
as stated in this
Highlights that the information is explicitly mentioned in the referenced source.
based on this
Focuses on the foundation or rationale provided by the referenced source.
in accordance with this
Emphasizes compliance or agreement with the referenced source.
pursuant to this
A more formal alternative, suggesting action taken following the guidelines of the referenced source.
following this
Indicates a sequence or consequence resulting from the referenced source.
as per the details here
A slight expansion, adding emphasis to the details being referenced.
by virtue of this
Implies that something is true or possible because of the referenced source.
in light of this
Suggests that the referenced source provides context or clarification.
as evidenced by this
Highlights the referenced source as proof or support for a claim.
FAQs
How can I use "per this" in a sentence?
Use "per this" to indicate that your statement or action is based on a particular document, instruction, or agreement. For example, "Per this agreement, we will proceed with the next phase of the project."
What's a good alternative to using "per this"?
Alternatives include "according to this", "based on this", or "as stated in this". The best choice depends on the specific context and level of formality you want to convey.
Is "as per this" grammatically correct?
While commonly used, "as per this" can be considered slightly redundant since "per" already implies "as stated by". Using simply "per this" is generally preferred for conciseness and clarity.
In what situations should I use "per this"?
Use "per this" when you need to formally reference a specific source of information or instruction. It's common in professional emails, reports, and formal documentation. Avoid it in casual conversations.
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
80%
Authority and reliability
4.5/5
Expert rating
Real-world application tested