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
as required to
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "as required to" is correct and usable in written English.
It can be used to indicate that something is necessary or needed in a particular context or situation. Example: "The team will proceed with the project as required to meet the deadline."
✓ Grammatically correct
Science
News & Media
Encyclopedias
Wiki
Alternative expressions(3)
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
The manual is reviewed and updated annually or as required to maintain an effective engineering program.
The region of interest width was adjusted as required to fit the wall thickness.
Science
The front-mounted electric motor would kick in as required to boost acceleration and hill-climbing performance.
News & Media
McLaren's "brake steer", as used in Formula One, nudges individual brakes as required to help point the car where required.
News & Media
This is the nearest approach to the universal camera, assembled as required to deal with practically every type of photography.
Encyclopedias
Isoflurane was administered as required to maintain stable hemodynamics.
These authors highlight self-regulation as required to "optimize performance" (p. 317).
We also implemented in-line C++ functions as required to perform some local computations.
Science
Plants were watered from below as required to maintain moist soil.
Students received corrective feedback as required to make accurate time lines.
The dose was adjusted every 3 days as required to achieve 2 soft stools per day.
Science
Expert writing Tips
Best practice
Use "as required to" to clearly indicate a conditional action, ensuring the reader understands the necessity behind it.
Common error
Avoid using "as required to" in sentences where simpler alternatives like 'if needed' or 'when necessary' would suffice. Overusing the phrase can make your writing sound unnecessarily formal or convoluted.
Source & Trust
78%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "as required to" functions as an adverbial phrase introducing a condition or purpose. It modifies the main verb in a sentence, indicating when or why an action should be taken. Ludwig provides numerous examples showing its utility across different contexts.
Frequent in
Science
71%
News & Media
11%
Wiki
5%
Less common in
Encyclopedias
2%
Formal & Business
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "as required to" is a grammatically correct and frequently used phrase that serves to introduce a conditional or purposeful element to a statement. As Ludwig AI confirms, it's most commonly found in scientific and formal writing, signaling that an action should only be performed when necessary. While versatile, it's important to consider whether simpler alternatives might be more appropriate in less formal contexts. Its strength lies in its precision, making it ideal for technical documentation and guidelines where clarity is paramount. The phrase should be used when accuracy and explicitness are preferred over brevity.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
as needed to
Replaces 'required' with 'needed', offering a slightly less formal tone.
as necessary to
Substitutes 'required' with 'necessary', emphasizing the importance of the condition.
when needed to
Focuses on the timing of the action, highlighting that it should only occur 'when needed'.
if necessary to
Introduces a conditional element, implying the action might not always be needed.
to the extent required to
Adds a degree of limitation, suggesting only the necessary amount or level is applied.
only when required to
Emphasizes the restrictiveness of the condition, highlighting that it should 'only' happen when necessary.
as deemed necessary to
Indicates that a judgment is involved in determining the necessity.
to the degree necessary to
Similar to 'to the extent required', but uses 'degree' to emphasize the level or intensity.
subject to the need to
Positions the action as being dependent on a specific need or requirement.
dependent on the requirement to
Directly states that the action's occurrence is 'dependent' on a specific 'requirement'.
FAQs
How can I use "as required to" in a sentence?
Use "as required to" to indicate that an action should only be performed when it is necessary or needed in a specific context. For example: 'The dose was adjusted every 3 days "as required to" achieve 2 soft stools per day.'
What can I say instead of "as required to"?
You can use alternatives like "as needed to", "as necessary to", or "when needed to" depending on the specific context and the level of formality you want to convey.
Is there a difference between "as required to" and "if required to"?
"As required to" implies a slightly stronger sense of necessity compared to "if required to". The latter suggests a more conditional situation where the action might not always be needed.
When is it best to use "as required to" in formal writing?
Use "as required to" in formal or technical writing where precision and clarity are important. It is particularly suitable when outlining procedures, regulations, or guidelines where specific actions are contingent on certain needs.
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
78%
Authority and reliability
4.5/5
Expert rating
Real-world application tested