You use all of before a number to emphasize how small or large an amount is.
[emphasis]
It took him all of 41 minutes to score his first goal.
I'm just checking up on Kim. It'll take me all of five minutes.
See full dictionary entry for all
all of in British English
no less or smaller than
she's all of thirteen years
See full dictionary entry for all
Examples of 'all of' in a sentence
all of
There was a certain sense of unreality about all of this, despite my very real fear.
Stuart Harrison BETTER THAN THIS (2002)
The clientele, exclusively men, eyed him over and around their own newspapers, not all of them today's.
Robert Wilson THE COMPANY OF STRANGERS (2002)
It is also the best place for all of us to have a private discussion.
Garth Nix LIRAEL: DAUGHTER OF THE CLAYR (2001)
All related terms of 'all of'
of all
You use of all to emphasize the words 'first' or ' last ', or a superlative adjective or adverb .
all kinds of
You can use all kinds of to emphasize that there are a great number and variety of particular things or people.
best of all
You use best of all to indicate that what you are about to mention is the thing that you prefer or that has most advantages out of all the things you have mentioned.
first of all
You use first of all to introduce the first of a number of things that you want to say .
least of all
You can use least of all after a negative statement to emphasize that it applies especially to the person or thing mentioned .
most of all
You use most of all to indicate that something happens or is true to a greater extent than anything else.
of all time
If you say that someone or something is, for example , the best writer of all time , or the most successful film of all time , you mean that they are the best or most successful that there has ever been.
worst of all
You say worst of all to indicate that what you are about to mention is the most unpleasant or has the most disadvantages out of all the things you are mentioning.
all manner of
If you refer to all manner of objects or people, you are talking about objects or people of many different kinds.
of all others
above all others
of all the X
You use all in expressions like of all the cheek or of all the luck to emphasize how angry or surprised you are at what someone else has done or said .
all of a doodah
excited ; agitated
all of a piece
with each part or aspect consistent with the rest
all of a sudden
If something happens all of a sudden , it happens quickly and unexpectedly.
maid of all work
a maid who does all types of housework
jack of all trades
If you refer to someone as a jack-of-all-trades , you mean that they are able to do a variety of different jobs. You are also often suggesting that they are not very good at any of these jobs.
out of all reason
unreasonable
the mother of all
something regarded as the biggest , most impressive , or most important of (its kind)
a bit of all right
a sexually attractive person, esp a woman
the mother of all …
the greatest example of its kind
a jack-of-all-trades
someone who has many different skills
all part of the game
If you say that something is all part of the game , you are telling someone not to be surprised or upset by something, because it is a normal part of the situation that they are in.
by all manner of means
certainly ; of course
Primate of all England
the Archbishop of Canterbury
all of a piece/of a piece
If something with several different parts is all of a piece , each part is consistent with the others. If one thing is of a piece with another, it is consistent with it.
out of all proportion to
If you say that something is out of all proportion to something else, you think that it is far greater or more serious than it should be.
think (all) the world of
to admire or love greatly
of one's own/all of one's own
If someone or something has a particular quality or characteristic of their own , that quality or characteristic is especially theirs, rather than being shared by other things or people of that type.
the be-all and end-all of sth
If something is the be-all and end-all to you, it is the only important thing in your life , or the only important feature of a particular activity .
money is the root of all evil
said to mean that greed is the cause of a particular problem or the cause of society's problems in general
and the rest/all the rest of it
You can add and the rest or all the rest of it to the end of a statement or list when you want to refer in a vague way to other things that are associated with the ones you have already mentioned .
beyond recognition/out of all recognition
If you say that someone or something has changed beyond recognition or out of all recognition , you mean that person or thing has changed so much that you can no longer recognize them.