Round a number to the nearest 5 in Python

Borislav Hadzhiev

Last updated: Jul 11, 2022

Photo from Unsplash

- Round a number to the nearest 5 in Python
- Round a number Up to the nearest 5 in Python
- Round a Number Down to the nearest 5 in Python

**To round a number to the nearest 5:**

- Call the
`round()`

function passing it the number divided by`5`

. - Multiply the result by
`5`

. - The result of the calculation is the number rounded to the nearest
`5`

.

main.py

`import math # ✅ Round number to nearest 5 def round_to_nearest_5(num): return round(num / 5) * 5 print(round_to_nearest_5(2)) # 👉️ 0 print(round_to_nearest_5(8)) # 👉️ 10 print(round_to_nearest_5(26)) # 👉️ 25 # -------------------------------------- # ✅ Round number UP to nearest 5 def round_up_to_nearest_5(num): return math.ceil(num / 5) * 5 print(round_up_to_nearest_5(23)) # 👉️ 25 print(round_up_to_nearest_5(57)) # 👉️ 60 # -------------------------------------- # ✅ Round number DOWN to nearest 5 def round_down_to_nearest_5(num): return math.floor(num / 5) * 5 print(round_down_to_nearest_5(121)) # 👉️ 120 print(round_down_to_nearest_5(129)) # 👉️ 125`

We used the `round()`

function to round a number to the nearest 5.

When passed a single argument, the round function rounds to the nearest integer.

main.py

`print(round(14.4)) # 👉️ 14 print(round(14.6)) # 👉️ 15`

Here is a step-by-step example of rounding a number up to the nearest five.

main.py

`print(24 / 5) # 👉️ 4.8 print(38 / 5) # 👉️ 7.6 print(round(24 / 5)) # 👉️ 5 print(round(38 / 5)) # 👉️ 8 print(round(24 / 5) * 5) # 👉️ 25 print(round(38 / 5) * 5) # 👉️ 40`

This is a two step process:

- Divide the number by
`5`

and round the result to the nearest integer. - Multiply the result by
`5`

to get the number rounded to the nearest`5`

.

**To round a number up to the nearest 5:**

- Call the
`math.ceil()`

method passing it the number divided by`5`

. - Multiply the result by
`5`

. - The result of the calculation is the number rounded up to the nearest five.

main.py

`import math def round_up_to_nearest_5(num): return math.ceil(num / 5) * 5 print(round_up_to_nearest_5(23)) # 👉️ 25 print(round_up_to_nearest_5(57)) # 👉️ 60`

The math.ceil method returns the smallest integer greater than or equal to the provided number.

main.py

`import math print(math.ceil(6.01)) # 👉️ 7 print(math.ceil(6.99)) # 👉️ 7`

If the passed in number has a fractional part, the

`math.ceil`

method rounds the number up.Here is a step-by-step example of rounding a number up to the nearest five.

main.py

`import math print(142 / 5) # 👉️ 28.4 print(148 / 5) # 👉️ 29.6 print(math.ceil(142 / 5)) # 👉️ 29 print(math.ceil(148 / 5)) # 👉️ 30 print(math.ceil(142 / 5) * 5) # 👉️ 145 print(math.ceil(148 / 5) * 5) # 👉️ 150`

This is a two step process:

- Divide the number by
`5`

and round the result up to the nearest integer. - Multiply the result by
`5`

to get the number rounded up to the nearest`5`

.

**To round a number down to the nearest 5:**

- Call the
`math.floor()`

method passing it the number divided by`5`

. - Multiply the result by
`5`

. - The result of the calculation is the number rounded down to the nearest
`5`

.

main.py

`import math def round_down_to_nearest_5(num): return math.floor(num / 5) * 5 print(round_down_to_nearest_5(121)) # 👉️ 120 print(round_down_to_nearest_5(129)) # 👉️ 125`

The math.floor method returns the largest integer less than or equal to the provided number.

main.py

`import math print(math.floor(3.99)) # 👉️ 3 print(math.floor(3.01)) # 👉️ 3`

If the passed in number has a fractional part, the

`math.floor`

method rounds the number down.Here is a step-by-step example of rounding a number down to the nearest 5.

main.py

`import math print(49 / 5) # 👉️ 9.8 print(56 / 5) # 👉️ 11.2 print(math.floor(49 / 5)) # 👉️ 9 print(math.floor(56 / 5)) # 👉️ 11 print(math.floor(49 / 5) * 5) # 👉️ 45 print(math.floor(56 / 5) * 5) # 👉️ 55`

This is a two step process:

- Divide the number by
`5`

and round the result down to the nearest integer. - Multiply the result by
`5`

to get the number rounded down to the nearest`5`

.

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