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
a thousandth of a second
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "a thousandth of a second" is correct and usable in written English.
It can be used when discussing precise measurements of time, particularly in scientific or technical contexts. Example: "The athlete completed the race in a time of 9.58 seconds, breaking the previous record by a thousandth of a second."
✓ Grammatically correct
News & Media
Science
Sport
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
28 human-written examples
"Everything changed momentarily, in a thousandth of a second.
News & Media
"Combustion happens in a thousandth of a second," said Eddie Sturman, the technical director.
News & Media
The transmission process can take less than a thousandth of a second.
News & Media
Muybridge took pictures with an exposure of a thousandth of a second.
News & Media
Then, suddenly, the claw snaps shut in less than a thousandth of a second.
News & Media
A thousandth of a second is known as a millisecond; a millionth of a second is a microsecond.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
30 human-written examples
Without such effects, an atom would have a half-life of only about a thousandth of a trillionth 10-155) of a second.
News & Media
It only lives for a trillionth of a trillionth of a trillionth of a second".
News & Media
This happened in bubbles smaller than the nucleus of an atom, which lasted only a billionth of a billionth of a billionth of a second.
News & Media
THE Large Hadron Collider (LHC) is a machine which will measure events that happen within a millionth of a billionth of a billionth of a second.
News & Media
THE Large Hadron Collider (LHC) is a machine whose experiments will measure events that happen within a millionth of a billionth of a billionth of a second.
News & Media
Expert writing Tips
Best practice
When precision is key, use "a thousandth of a second" or its numerical equivalent (0.001 seconds) in scientific and technical writing for accuracy.
Common error
Avoid using "a thousandth of a second" interchangeably with "a microsecond". A microsecond is one millionth of a second, which is significantly shorter.
Source & Trust
93%
Authority and reliability
4.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a thousandth of a second" functions primarily as a noun phrase, specifying a precise and very short duration of time. As Ludwig AI confirms, it's grammatically correct and suitable for contexts requiring accuracy.
Frequent in
News & Media
52%
Science
28%
Sport
12%
Less common in
Wiki
4%
Formal & Business
4%
Reference
0%
Ludwig's WRAP-UP
In summary, "a thousandth of a second" is a grammatically correct and commonly used phrase for expressing a very short duration of time. Ludwig provides numerous examples demonstrating its use in diverse contexts like news, science, and sports. As indicated by Ludwig AI, the phrase is suitable for scenarios demanding precision, and can be replaced with alternatives like "one millisecond" or "0.001 seconds" for technical accuracy. While generally neutral to formal in register, it's crucial to differentiate it from other time units like microseconds. Therefore, understanding its correct usage is essential for clear and accurate communication.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
one millisecond
Uses the scientific term for a thousandth of a second.
0.001 seconds
Expresses the duration numerically.
a millisecond
Simplifies to the standard unit of measurement.
an extremely short time
Focuses on the brevity of the duration without precise measurement.
a very brief moment
Emphasizes the fleeting nature of the time.
a split second
Highlights the quickness of the event.
an instant
Suggests an almost imperceptible duration.
a fraction of a second
Indicates a small part of a second.
a tiny fraction of time
Highlights the minimal amount of time passed.
a fleeting moment
Captures the transient nature of the duration.
FAQs
How can I use "a thousandth of a second" in a sentence?
You can use "a thousandth of a second" to describe extremely short durations, especially in scientific or technical contexts. For example: "The reaction occurred in "a thousandth of a second"."
What's another way to say "a thousandth of a second"?
Alternatives include "one millisecond" or 0.001 seconds, both of which are scientifically accurate and widely understood.
Is it correct to say "one thousandth of a second" instead of "a thousandth of a second"?
Both "a thousandth of a second" and "one thousandth of a second" are grammatically correct and acceptable, but "a thousandth of a second" is more common.
How does "a thousandth of a second" compare to other units of time?
A "thousandth of a second" is longer than "a millionth of a second" (microsecond) but shorter than "a hundredth of a second". It's a very brief duration often relevant in high-speed processes.
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
93%
Authority and reliability
4.8/5
Expert rating
Real-world application tested