Functions
Learn how to use the built-in functions within Notion formulas.
In programming, a function is a reusable bundle or "chunk" of code. Functions have names which, when called elsewhere in the program, execute the function's code.
Functions can also take in outside data (these are called arguments), and return new data.
In Notion formulas, you cannot define your own functions. However, Notion has provided many built-in functions you can use.
For example, the length function takes in a string argument and outputs a number equal the number of characters in that string.
1
length("Monkey D. Luffy") // Output: 15
Here's a list of every function available for use in a Notion formula. Click a function to learn more about how it works and see more examples.
Function
Data Output Type
Example
Output
​concat​
String
concat("Roronoa "," Zoro")
Roronoa Zoro
​join​
String
join(", ","Luffy ","Zoro","Nami","Chopper")
Luffy, Zoro, Chopper
​slice​
String
slice("Dangerfield",0,6)
Danger
​length​
Number
length("Monkey D. Luffy")
15
​format​
String
format(4)
4 (as a string)
​toNumber​
Number
toNumber("42")
42 (as a number)
​contains​
Boolean
contains("Monkey D. Luffy", "Luffy")
True
​replace​
String
replace("Pogo","Po","Dog")
Doggo
​replaceAll​
String
replaceAll("Dogs Dogs Dogs","Dogs","Cats")
Cats Cats Cats
​test​
Boolean
test("Monkey D. Luffy", "Luffy")
True
​empty​
Boolean
empty("")
True
​abs​
Number
abs(-42)
42
​cbrt​
Number
cbrt(64)
4
​ceil​
Number
ceil(4.2)
5
​exp​
Number
exp(2)
7.389056098931
​floor​
Number
floor(4.2)
4
​ln​
Number
ln(20)
2.995732273554
​log10​
Number
log10(1000)
3
​log2​
Number
log2(64)
6
​max​
Number
max(3,5,4)
5
​min​
Number
min(4,1,9,-3)
-3
​round​
Number
round(4.5)
5
​sign​
Number
sign(-5)
-1
​sqrt​
Number
sqrt(16)
4
​start​
Date
start(prop("Date"))
August 18, 2022
​end​
Date
end(prop("Date"))
August 25, 2022
​now​
Date
now()
August 18, 2022 2:10 PM
​timestamp​
Number
timestamp(now())
1660853460000
​fromTimestamp​
Date
fromTimestamp(1656012840000)
June 23, 2022 1:34 PM
​dateAdd​
Date
dateAdd(now(),3,"months")
November 18, 2022 2:11 PM
​dateSubtract​
Date
dateSubtract(now(),3,"months")
May 18, 2022 2:11 PM
​dateBetween​
Number
dateBetween(now(),prop("Date"),"days")
9
​formatDate​
String
formatDate(now(), "MMMM DD YYYY")
August 18 2022
​minute​
Number
minute(now())
9
​hour​
Number
hour(now())
14
​day​
Number
day(now())
4
​date​
Number
date(now())
18
​month​
Number
month(now())
7
​year​
Number
year(now())
2022
​id​
String
id()
c5d67d15854744869cc4a062fb7b1377

Functions can accept other functions as arguments, so long as the inner function outputs the data type that the outer function requires.
Here are a couple examples:
1
slice(format(1932),0,2)
2
// Output: 19
3
​
4
// Expanded form
5
slice(
6
format(1932),
7
0,
8
2
9
)
10
​
11
---
12
​
13
// Get the century name (e.g. "20th") from a year (expressed as a number)
14
concat(format(add(toNumber(slice(format(1932),0,2)),1)),"th")
15
// Output: 20th
16
​
17
// Expanded form
18
concat(
19
format(
20
add(
21
toNumber(
22
slice(
23
format(1932),
24
0,
25
2
26
)
27
),
28
1
29
)
30
),
31
"th"
32
)
For more examples, see the example databases for most of the functions. The majority in this reference use other functions as arguments in order to do useful things. To start, I'll recommend checking out the format function's example database.

​
My name is Thomas Frank, and I'm a Notion-certified writer, YouTuber, and template creator. I've been using Notion since 2018 to organize my personal life and to run my business and YouTube channel. In addition to this formula reference, I've created a free Notion course for beginners and several productivity-focused Notion templates. If you'd like to connect, follow me on Twitter.
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Functions as Arguments