we need to fill up vs we need to fill in

Both phrases are correct, but they are used in different contexts. 'We need to fill up' is used when referring to filling a container to its full capacity, while 'We need to fill in' is used when referring to completing a form or providing information. They are not interchangeable.

Last updated: March 26, 2024 • 4304 views

This phrase is correct when referring to filling a container to its full capacity.

"we need to fill up"

This phrase is used when talking about filling something, like a gas tank, to its maximum capacity.

Examples:

We need to fill up the car with gas before we leave.
Please fill up the water pitcher before the guests arrive.

Show examples from the web [+]

Secondly, Mr Schulz is quite right that we need to fill up the time.
I need you to fill up the restaurant any way you can.
I don't mean any harm. I just need to fill these up.
I need to get a fill up.
But you need it because it fills up space.
Prime Minister Putin said that anyone can lay as many rusty iron pipes in the ground as they want, but they will need something to fill them up with.
If we fill up on dumplings, we need to eliminate another entree.
We just need to remember that our obligations to one another, our relationships to one another, these things don't exist only to fill up our days.
Listen, I need some warm bodies to fill up my table.
Just need to wait till it fills up.
You need a face mask to - to fill up your bike tires?
Undergraduate Psych classes tend to fill up rather quickly.
We need to fill out some paperwork and ask some questions.
There's a few forms we need to fill out.
I think we need to fill out some forms.
We need to fill in the gaps and find these kids.
We need to fill Charlotte's bag with these mini quiches.
Last time I estimated, we need 4 million won to fill it up with books.
That's why we need to fill in the gaps with Dryden.
We need to fill Sarah's position.

Alternatives:

We need to top up
We need to refill
We need to replenish
We need to load up
We need to stock up

This phrase is correct when referring to completing a form or providing information.

"we need to fill in"

This phrase is used when talking about completing a form, providing information, or adding details to something.

Examples:

Please fill in your name and address on the registration form.
Don't forget to fill in the missing information on the report.

Show examples from the web [+]

That's why we need to fill in the gaps with Dryden.
We need to fill in the gaps and find these kids.
We got the general shape from Dr. Tanaka's cast, but we still need to fill in the details.
And we need you to fill in for him at the championship tonight.
What we need now is to fill in the time between his arrival and the incident.
We just need you to fill in some missing pieces.
We also need and wish to fill in the gap between the European Union Institutions and citizens.
We need to fill a vacuum in order to make this possible in the event of an accident caused by one of the ships that, in spite of the obligations laid down in this Directive, sail our Community seas without financial guarantee certificates.
No need to fill in the...
Kristin just needs to fill in a few details.
In case you need to fill in for me one day.
We need to fill out some paperwork and ask some questions.
There's a few forms we need to fill out.
I think we need to fill out some forms.
We need to fill Charlotte's bag with these mini quiches.
Secondly, Mr Schulz is quite right that we need to fill up the time.
Someone needs to fill in to argue a motion in limine for his ketwilder case, and I need you to back my play.
A driving licence form and some other ID stuff you'll need to fill in.
To obtain documents that are not directly accessible from the register, you need to fill in and submit the request form.
In order to obtain a Danish tax number, foreign businesses need to fill in a specific form.

Alternatives:

We need to complete
We need to add
We need to provide
We need to input
We need to write in

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we need to fill up vs we need to fill in

"we need to fill up"

"we need to fill in"

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