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
vary approximately from
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "vary approximately from" is correct and usable in written English.
It can be used when discussing a range of values or measurements that are not fixed and can fluctuate within certain limits. Example: "The temperatures in this region vary approximately from 20 to 30 degrees Celsius throughout the year."
✓ Grammatically correct
Science
Encyclopedias
News & Media
Alternative expressions(2)
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
2 human-written examples
For all environments, the observed effect of particle size is relatively weak and the exponents in the descriptive Dn relations appropriate for the current experiments vary approximately from 0.3 to 1.
Science
It is also indicated that the percentage relative deviations between the observed and the modeled values vary approximately from −11%to12%2% (March), −34% to 11% (June), −16% to 12% (September), and −10% to 13% (December).
Science
Human-verified similar examples from authoritative sources
Similar Expressions
58 human-written examples
Average annual rainfall of the region is 1,170 mm and the temperature varies approximately from 1 °C in winter to 45 °C in the summer.
Science
This time must be set against that required for the GBVS-based version which varies approximately from 100 s for QCIF video contents to 350 400 s for CIF ones.
As shown in Figure 4(A), the APACHE II scores of the patients observed in the current study ranged from 9 to 34 points, for which the daily average noise level varied approximately from 50 to 53 dBA.
Science
The main challenges for imaging islets of Langerhans are (1) the localization of the pancreas deep inside the abdominal cavity, (2) the very low density of these islets in the pancreas and (3) their diverse shapes and small size, which varies approximately from 30 to 300 μm in diameter.
Science
Estimates of the age of Last Eukaryotic Common Ancestor (LECA) vary approximately twofold, from ~1,100 million years ago (Mya) to ~2,300 Mya.
Science
The noise power density spectrum varies approximately as 1/fα from 0.5 Hz to 1 KHz where α ranges from 0.7 to 1.1.
The peak power density varied approximately linearly with glucose concentrations from 2 to 77 mM/m2 (1–7 mM) with a 1 kΩ resistance.
The local volumetric mass transfer coefficients were found to vary from approximately 0.04 (s−1) at the inlet to about 0.01 (s−1) in the downstream sections.
Science
Inset of Fig. 3a shows that the diameters of AuNPs vary from approximately 12 to 57 nm with average size of around 27.5 nm. Figure 3b shows the TEM image of AuNPs synthesized from S. tenerrimum.
Expert writing Tips
Best practice
To improve readability, try to maintain consistency in the units of measurement used within the specified range, this allows for a better clarity. For example, avoid using different units when indicating the range is between the length of an object.
Common error
Avoid using "vary approximately from" when a precise range is known. This phrase is best suited for situations where there is inherent uncertainty or variability.
Source & Trust
74%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "vary approximately from" functions as a modifier, specifically to qualify the extent or degree of variation. As Ludwig AI confirms, it is acceptable in written English. It describes that something changes within a particular range, but not with exact precision.
Frequent in
Science
70%
Encyclopedias
15%
News & Media
15%
Less common in
Formal & Business
0%
Social Media
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "vary approximately from" is a grammatically sound and usable expression for indicating a range of values with a degree of imprecision. Ludwig AI highlights that this expression is appropriate when the data is not fixed and can fluctuate. While the phrase has its use in News & Media or Encyclopedias, its primary usage is within scientific contexts. When writing, use "vary approximately from" when the range is not precise. If you need other options, you can use "range roughly from" or "fluctuate between".
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
range roughly from
Replaces "vary" with "range" and "approximately" with "roughly", creating a more informal tone.
differ approximately from
Substitutes "vary" with "differ", emphasizing the difference in values.
fluctuate between
Focuses on the back-and-forth movement between values, rather than a general difference.
deviate approximately from
Emphasizes the departure from a norm or expected value.
span approximately from
Highlights the width or scope of the variation.
extend approximately from
Implies a range in physical or abstract space.
oscillate approximately between
Suggests a rhythmic variation between the given values.
go approximately from
A more casual and less formal way to express variation.
modulate approximately from
Indicates that the variation is controlled or influenced by another factor.
waver approximately from
Suggests an unsteady or unreliable variation.
FAQs
How can I use "vary approximately from" in a sentence?
Use "vary approximately from" to describe a range of values that are not fixed or exact. For example, "The project costs "vary approximately from" $10,000 to $15,000 depending on the materials used."
What are some alternatives to "vary approximately from"?
Alternatives include "range roughly from", "fluctuate between", or "differ approximately from". The best choice depends on the specific nuance you want to convey.
Is it better to say "vary approximately from" or "range from approximately"?
Both phrases are acceptable, but "vary approximately from" emphasizes the variation itself, while "range from approximately" focuses on the boundaries of the range. Choose the phrasing that best fits the context.
In what situations should I use "vary approximately from"?
Use "vary approximately from" when describing data or measurements that are subject to some degree of uncertainty or fluctuation, but still fall within a certain estimated range. In contrast use "vary from" when talking about absolute measures.
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
74%
Authority and reliability
4.1/5
Expert rating
Real-world application tested