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
gain weight
Grammar usage guide and real-world examplesUSAGE SUMMARY
"gain weight" is correct and can be used in written English.
You can use it to describe the process of becoming heavier due to an increase in body mass. For example, "I'm trying to gain weight so that I can compete in the heavyweight class for powerlifting."
✓ Grammatically correct
News & Media
Science
Formal & Business
Alternative expressions(20)
cultivate enthusiasm
develop an interest
pique curiosity
assume greater importance
gain stature
gaining weight
add weight
attract attention
high significance
gain relevance
increase in importance
become important
spark interest
gain importance
take on importance
gain value
gain interest
earn recognition
gain motivation
gain clout
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
Did you gain weight?
News & Media
He cannot gain weight.
News & Media
You can't gain weight.
News & Media
We lose or gain weight.
News & Media
"I don't want to gain weight".
News & Media
They gain weight and experience health problems.
News & Media
Why did Jessica Simpson gain weight?
News & Media
Because I gain weight very easily".
News & Media
Housebound, she began to gain weight.
News & Media
"They have the paradoxical effect of making people gain weight".
News & Media
The children who drank diet drinks did not gain weight.
News & Media
Expert writing Tips
Best practice
When discussing health or lifestyle changes, use "gain weight" in conjunction with specific details about diet, exercise, or underlying medical conditions to provide a more complete picture.
Common error
Instead of simply stating someone needs to "gain weight", specify whether the goal is to increase muscle mass, improve overall health, or address a specific medical condition. Provide context and avoid ambiguity.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "gain weight" functions primarily as a verb phrase. It describes the action of increasing body mass. As Ludwig AI confirms, this phrase is grammatically correct and widely used. Examples show its application in describing personal experiences, health goals, and the effects of certain conditions or behaviors.
Frequent in
News & Media
62%
Science
20%
Formal & Business
9%
Less common in
Wiki
6%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "gain weight" is a grammatically sound and frequently used phrase that describes the process of increasing body mass. As Ludwig AI points out, it is suitable for a wide range of contexts, from describing personal health goals to discussing the effects of dietary habits. The phrase is most commonly found in news and media, as well as scientific and business publications. While there aren't really incorrect scenarios for its usage, being mindful of the audience will help maximize clarity and specificity. For instance, in scientific or formal contexts, alternatives such as "increase body mass" might be more appropriate. In everyday conversation, phrases like "put on pounds" can be used. By understanding these nuances, you can effectively use "gain weight" in your written and spoken communication.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
put on pounds
A more informal way of saying "gain weight", often used in everyday conversation.
add weight
A straightforward alternative that emphasizes the addition of weight to the body.
pack on weight
Implies gaining weight quickly or excessively.
increase body mass
Focuses on the physiological change of increasing the amount of tissue in the body.
become heavier
Describes the change in weight from a comparative perspective.
bulk up
Implies gaining weight primarily through muscle mass, often associated with fitness and bodybuilding.
flesh out
Suggests adding weight to become fuller or more rounded in appearance, particularly when someone is thin.
fatten up
Suggests gaining weight intentionally, often for a specific purpose like preparing an animal for slaughter.
develop stoutness
Emphasizes the process of gaining weight towards a more robust or heavy build.
grow plump
Describes gaining weight in a way that suggests becoming pleasantly rounded.
FAQs
How can I use "gain weight" in a sentence?
You can use "gain weight" in various contexts. For example, "He's trying to "gain weight" to improve his strength", or "She needs to "gain weight" after her illness".
What are some alternatives to saying "gain weight"?
Alternatives include "increase body mass", "put on pounds", or "bulk up" depending on the specific context and desired nuance.
Which is correct, "gain weight" or "gain a weight"?
"Gain weight" is the correct and more common usage. "Gain a weight" is grammatically incorrect in most contexts.
What's the difference between "gain weight" and "increase weight"?
While similar, "gain weight" generally refers to a natural process of adding body mass, while "increase weight" can refer to both natural processes or artificial means such as adding weights to a barbell.
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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested