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
the amount of days
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "the amount of days" is not correct in standard written English; it should be "the number of days." You can use it when referring to a countable quantity of days in a specific context, such as planning or scheduling.
Example: "The project will take the number of days we estimated to complete."
⚠ May contain grammatical issues
Science
News & Media
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
33 human-written examples
The number of women currently meeting physical activity recommendations of 150 minutes of moderate intensity physical activity [ 31] each week was determined by multiplying the amount of days they reported being active by the time per day spent practicing physical activity.
Science
Each itinerary is designed to minimise the amount of days required off work while maximising the potential for "outstanding and original experiences".
News & Media
The city has put some restrictions on the amount of days you can rent your property, but these are apparently easy to evade and not well enforced.
News & Media
The biggest increase in stress was in the East Midlands, where the amount of days taken off has increased by 142%.
News & Media
Also take into account the amount of days they give you to pay the settlement and make sure you stick within this timescale.
News & Media
Yet no differences in the amount of days or total received dosage of fentanyl between the groups were present.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
27 human-written examples
Day 2, we multiply the amount of day 1 by 2 and have, 2 pennies.
Wiki
There's also the "amount of interaction day by day" with students, he said, adding, "And the counseling particularly is very significant".
News & Media
The amount of cold days decreased by >60%% to 19 days in the T max scenario.
The amount of headache days per month was reported by the patients partially on the basis of their headache diaries.
Data about the amount of working days lost due to scaphoid fractures is limited.
Expert writing Tips
Best practice
When referring to a specific, countable number of days, it is generally more grammatically correct to use "the number of days" instead of "the amount of days".
Common error
Avoid using "amount" when referring to countable items like days. "Amount" is best used for uncountable nouns. Use "number" instead for countable nouns, so prefer saying "the number of days" over "the amount of days".
Source & Trust
79%
Authority and reliability
3.2/5
Expert rating
Real-world application tested
Linguistic Context
The phrase functions primarily as a noun phrase specifying a period or quantity of time. While grammatically questionable, it often serves to indicate a duration involving multiple days. As Ludwig AI suggests, it's typically better to use "number" instead of "amount" with countable nouns.
Frequent in
Science
32%
News & Media
32%
Wiki
24%
Less common in
Formal & Business
3%
Encyclopedias
3%
Social Media
3%
Ludwig's WRAP-UP
In summary, while the phrase "the amount of days" is used in various contexts, it is generally considered grammatically incorrect. The preferred and more precise alternative is "the "number of days"" when referring to a countable quantity. As Ludwig AI highlights, "amount" is best reserved for uncountable nouns. Although "the amount of days" appears in news, scientific publications, and general web content, adopting "the "number of days"" will improve clarity and adherence to standard English grammar. Remember to prioritize precision and grammatical accuracy in formal writing by choosing "number" over "amount" in such cases.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
the number of days
Replaces "amount" with "number", correcting the grammar for countable nouns.
the duration of days
Focuses on the length of the period rather than quantity.
the period of days
Similar to duration, emphasizing a span of time.
the count of days
Emphasizes a precise calculation or tally.
the total days
Highlights the cumulative aspect of the days.
the span of days
Suggests a broader, less precise timeframe.
the length of the days
Focuses on individual day duration, not the total period.
the timeframe in days
Highlights the temporal aspect and unit of measurement.
the interval of days
Suggests regularly spaced or recurring days.
the phase of days
Highlights days as components of a process.
FAQs
What is the correct way to refer to a quantity of days?
The grammatically preferred way to refer to a quantity of days is to use "the "number of days"" instead of "the amount of days".
When should I use "amount" versus "number"?
"Amount" is typically used for uncountable nouns (e.g., the amount of water), while "number" is used for countable nouns (e.g., the "number of days").
Is "the amount of days" ever correct?
While not grammatically preferred, "the amount of days" might be used informally, though it's better to opt for "the "number of days"" for clarity and correctness.
What are some alternatives to "the amount of days"?
Alternatives include "the "duration of days"", "the "period of days"", or "the "number of days"", depending on the specific context.
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
79%
Authority and reliability
3.2/5
Expert rating
Real-world application tested