What it means
そんなに is an adverb meaning “so much,” “that much,” or “to that extent.” It usually refers to a degree that has already been mentioned or is clear from the situation. It is especially common with negative predicates to mean “not so much” or “not that.” It can modify adjectives and verbs, and it normally appears directly before the word or predicate it modifies.
Usage note
そんなに is often used with a negative predicate, such as “not that expensive” or “not eating that much.” Without a negative predicate, it emphasizes a large degree and usually depends on the surrounding context.
How to use it
この町はそんなに静かではありません。
This town is not that quiet.
その箱はそんなに重くありません。
That box is not that heavy.
私はそんなに肉を食べません。
I do not eat that much meat.
この町はそんなに静かではない。
This town is not that quiet.
その箱はそんなに重くない。
That box is not that heavy.
私はそんなに肉を食べない。
I do not eat that much meat.
Example sentences
このかばんはそんなに重くないので、毎日学校へ持って行けます。
This bag is not that heavy, so I can take it to school every day.
駅からホテルまでは、そんなに遠くありません。
The hotel is not that far from the station.
この薬はそんなに苦くありません。
This medicine is not that bitter.
この映画はそんなに長くないので、夕食の前に見終