Into vs In To: What's the Difference?
Quick Answer
"Into" = movement or transformation (one word)
"In to" = "in" is part of a phrasal verb + "to" is separate (two words)
The Key Difference
INTO (one word)
Movement or transformation
"She walked into the room."
"Water turned into ice."
IN TO (two words)
Phrasal verb + infinitive/purpose
"I logged in to my account."
"She came in to talk."
Key: If there's a phrasal verb (log in, hand in, turn in, come in), keep "in" and "to" separate.
When to Use "INTO" (One Word)
Use "into" for:
- • Physical movement: entering a space
- • Transformation: changing from one thing to another
- • Direction: toward the inside of something
When to Use "IN TO" (Two Words)
Use "in to" when "in" is part of a phrasal verb:
- • log in + to → log in to
- • hand in + to → hand in to
- • turn in + to → turn in to (submit)
- • come in + to → come in to
Tricky Comparison: Turn Into vs Turn In To
TURN INTO
Transform/become
"The caterpillar turned into a butterfly."
TURN IN TO
Submit to someone
"Please turn your homework in to the teacher."
Practice
Fill in the blank:
"You need to log _____ your email account." (into / in to)
Show answer
Answer: You need to log in to your email account.
"Log in" is a phrasal verb, so "in" and "to" stay separate.
Memory Trick
Ask yourself: Is there a phrasal verb?
- • YES (log in, hand in, come in) → use in to
- • NO (just movement/change) → use into
Related Grammar
Movement inward or two separate words?
Into can describe entering a space or a change: walk into a room, turn into ice. In to occurs when in belongs to the preceding expression and to has a separate role: come in to discuss the plan.
Practise the distinction
She poured the tea ___ a cup.
Show answer and explanation
into
The tea moves to the inside of the cup.
He came ___ ask a question.
Show answer and explanation
in to
In belongs to came in; to ask gives the purpose.
The water turned ___ ice.
Show answer and explanation
into
Into introduces the result of the change.