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
twofold that of
Grammar usage guide and real-world examplesUSAGE SUMMARY
"twofold that of" is correct and usable in written English.
You can use the phrase to compare two similar things when you want to emphasize a large difference. For example: "The number of people attending the concert was twofold that of last year's event."
✓ Grammatically correct
Science
News & Media
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
9 human-written examples
The character he has confirmed in the debate about debates is twofold: that of an entitled, spoiled brat who wants to play by his own rules or else take his feather pillow and go home, and that of a man who wants to avoid confrontation at almost any cost.
News & Media
The photocatalytic efficiency of TiO2@CNTs thin films is nearly twofold that of TiO2 thin film.
Science
The temperature of Oh at daytime conditions is about twofold that of the standard temperature of neutral gas and may be as high as 2000 K (the main version of calculations), possibly even reaching a value of 3900 K for a model run with Tv = 1.3 · Te.
Science
The crime rate in this study of former child psychiatric in-patients was more than twofold that of the general population.
Science
When compared with CDB-DsRed at 96 h, the intensity of DsRed is even higher than twofold that of CDB-DsRed.
We also found that MetS influences tear secretion volume, since the prevalence of lacrimal gland hypofunction in the MetS group (34.0%) was approximately twofold that of the non-MetS group.
Human-verified similar examples from authoritative sources
Similar Expressions
51 human-written examples
Nonlinear regression analysis of the distribution of the log2 ratios of their levels relative to wild-type cells showed two populations, one of which encompassed the majority with a mean ratio of 0.46 (1.4-fold), a value significantly lower than the predicted increase of twofold that would be expected if protein levels scaled with gene copy number.
Science
The encapsulation of alginate microparticles within PNIPAAm-g-CS gels caused the tensile strength to increase twofold over that of PNIPAAm-g-CS blends with CS aldehyde (p < 0.05).
Science
From the results, it is found that in the case of GW-BiVO4, composite degradation reach up to 89% within 150 min which will reach up to 95% after the irradiation for 210 min which is found nearly twofold than that of the pure BiVO4, since MB itself is photocatalytically active during the blank experiment, without the catalyst, it shows some decolorization.
Science
The specific capacity at such high current density is still over twofold than that of commercial graphite anode, suggesting that the nanoporous Si architectures is suitable for high-performance Si-based anodes for lithium ion batteries in terms of capacity, cycle life, and rate capacity.
The loading capacity of rNGO-PEG (about 180%% w/w) was about twofold than that of NGO/PEG (about 86%% w/w) (Additional file 1: Figure S2B), which was probably because of the repaired aromatic ring structures that increased the π π stacking and hydrophobic interactions between rNGO-PEG and the aromatic ICG molecules.
Science
Expert writing Tips
Best practice
When using "twofold that of", ensure that you are comparing comparable entities to maintain clarity and logical coherence. For instance, compare the efficiency of two distinct processes or the occurrence rate of different events.
Common error
Avoid using "twofold that of" in situations where you are not explicitly comparing two quantities or magnitudes. The phrase inherently implies a comparative relationship, and using it otherwise can lead to confusion or grammatical errors.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "twofold that of" functions primarily as a comparative quantifier. It is used to specify that a particular quantity, amount, or degree is exactly twice the size, extent, or magnitude of another, as Ludwig's examples confirm.
Frequent in
Science
88%
News & Media
12%
Formal & Business
0%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "twofold that of" is a grammatically sound comparative quantifier, commonly employed to denote that one quantity is twice the amount of another. As Ludwig AI confirms, the phrase is accurate and usable in written English. Predominantly featured in scientific and news contexts, it underscores a formal register. For everyday communication, consider alternative phrases such as "twice as much as" or "double that of". Remember that "twofold that of" should only be used in comparative settings.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
twice as much as
Indicates a doubling of quantity, differing in word choice but maintaining the same proportional meaning.
double that of
A more concise way of expressing the same quantitative relationship, replacing "twofold" with "double".
twice the amount of
Replaces "much" with "amount" to specify that the quantity is measured.
two times greater than
Uses "times greater" to indicate multiplication, changing the phrasing slightly.
100 percent more than
Expresses the doubling as a percentage increase, clarifying the proportional relationship.
double in comparison to
Expresses a multiplication of something in relation to another.
increased by a factor of two over
Uses "factor of two" to emphasize the multiplicative nature of the increase.
two times the size of
Focuses on the size attribute instead of quantity but maintains proportional comparison.
of double the magnitude of
Emphasizes the degree of something, while maintaining the quantitative relationship.
in double proportion to
Focuses on proportionality of something in relation to another.
FAQs
How can I use "twofold that of" in a sentence?
Use "twofold that of" to indicate that one quantity is twice the amount of another. For example, "The efficiency of the new engine is "twofold that of" the old one".
What alternatives can I use instead of "twofold that of"?
You can use alternatives such as "twice as much as", "double that of", or "two times greater than" depending on the specific context.
Is it correct to say "twofold of" instead of "twofold that of"?
No, "twofold of" is grammatically incorrect in this context. The correct phrasing is ""twofold that of"", which provides a clear comparison between two distinct quantities or values.
What is the difference between "twofold that of" and "twice as much as"?
While both phrases indicate a doubling, ""twofold that of"" is often used in more formal or scientific contexts, whereas ""twice as much as"" can be used more broadly.
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
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested