If x is a float number that you want to round up to an integer, and you want an integer type result, you could use
rounded_up_x = int(-(-x // 1))
This works because integer division by one rounds down, but using the negative sign before and after doing the division rounds the opposite direction. The int here converts the float result to an integer. Remove that int if you want a floating point value that equals an integer, which is what some programming languages do.
Hat-tip to @D.LaRocque for pointing out that Python's ceil() function returns an integer type.
Reddit
reddit.com › r/learnpython › how to round up without math modules?
How to round up without math modules? : r/learnpython
August 24, 2021 - Casting a float as an integer will always round down, you can make use of that to create your own 'roundup' function by just casting your number as an int, then adding 1. The exception to that is if your number is already an integer - in that case we don't want to do anything to it, we can ...
AskPython
askpython.com › home › round up numbers in python without math.ceil()
Round Up Numbers in Python Without math.ceil() - AskPython
June 30, 2023 - math.ceil(your_number): It works as the ceiling function for a particular number. It rounds your number up to the next integer greater than itself.
Videos
03:56
Rounding Up (Video) – Real Python
14:05
Introduction to Rounding Numbers in Python - YouTube
30:27
Python - Rounding, Banker's Rounding (round, math.ceil ...
04:11
Round off decimal to 2 places in python using round function - YouTube
How to round to the nearest 10, 100, 1000 with Python
How to Round Numbers in Python ( Not What You Expect) - YouTube
Top answer 1 of 8
15
If x is a float number that you want to round up to an integer, and you want an integer type result, you could use
rounded_up_x = int(-(-x // 1))
This works because integer division by one rounds down, but using the negative sign before and after doing the division rounds the opposite direction. The int here converts the float result to an integer. Remove that int if you want a floating point value that equals an integer, which is what some programming languages do.
Hat-tip to @D.LaRocque for pointing out that Python's ceil() function returns an integer type.
2 of 8
2
in Python 3, we have object.__ceil__() that is even called by math.ceil internally,
num = 12.4 / 3.3
print(num)
3.757575757575758
num.__ceil__()
4
Or one can always negate the result of a negated number's floor division (and create a new int object unless a float would do),
int(-(-12.4 // 3.3))
4
Sololearn
sololearn.com › en › Discuss › 3103388 › how-do-i-round-up-the-the-nearest-whole-number-without-importing-math-thanks
how do i round up the the nearest whole number without importing math. Thanks | Sololearn: Learn to code for FREE!
Mr Steven Kervick🇺🇦 there ... it won't round up an exact integer. import sys rup = 1.0 - sys.float_info.epsilon ... y = int(y + rup) # to round up...
Medium
medium.com › @ElizavetaGorelova › rounding-in-python-choosing-the-best-way-c20c2a37fe29
Rounding in Python: Choosing The Best Way | by Elizaveta Gorelova | Medium
March 15, 2024 - If we skip this step, Python simply won’t understand how to perform these functions. The ceil() function rounds the result up. For example, the number 6.5 is between 6 and 7, so the algorithm will automatically round it to 7:
Delft Stack
delftstack.com › home › howto › python › python round up
How to Round Up a Number in Python | Delft Stack
February 2, 2024 - An example code is given below to explain how to use simple arithmetic to round up a number in Python without importing the math library.
Top answer 1 of 16
1382
The math.ceil (ceiling) function returns the smallest integer higher or equal to x.
For Python 3:
import math
print(math.ceil(4.2))
For Python 2:
import math
print(int(math.ceil(4.2)))
2 of 16
348
I know this answer is for a question from a while back, but if you don't want to import math and you just want to round up, this works for me.
>>> int(21 / 5)
4
>>> int(21 / 5) + (21 % 5 > 0)
5
The first part becomes 4 and the second part evaluates to "True" if there is a remainder, which in addition True = 1; False = 0. So if there is no remainder, then it stays the same integer, but if there is a remainder it adds 1.
Reddit
reddit.com › r/learnpython › how to round without using round()
r/learnpython on Reddit: how to round without using round()
September 4, 2023 -
I had this python challenge in class where we had to take input from a user to see what digits to round pi to and we had to print the result without using the round() function. so for example if the input was 5, then it would print out 3.14159. im not sure how to do it without using round(). I tried using {:.f} string formatting but I cannot insert a variable, only a number
Top answer 1 of 5
5
The f-string {...} brackets can be nested. Try replacing the "number of places" "y" number in {...:x.yf}with another {...} replacement: import math numplaces = 6 print(f"{math.pi:.{numplaces}f}")
2 of 5
4
I don't think using string formatting actually satisfies what the question is asking. You're not truly rounding, you're displaying a rounded value. See below: user_input = int(input("Number of digits to round to: ") rounding = 10 ** user_input mypi = int(pi * rounding) / rounding Or if you want to do it a bit more concisely: mypi = int(pi * (rounding := 10 ** user_input)) / rounding
Sololearn
sololearn.com › en › Discuss › 2741701 › round-up-and-round-down-without-ceil-and-floor
Round up and round Down without ceil and floor? | Sololearn: Learn to code for FREE!
Some solutions without import math? https://code.sololearn.com/cheV1liq5384/?ref=app · python · 31st Mar 2021, 2:47 PM · Илья Мирошник · 2 Answers · Answer · + 3 · Looks like a solution, so what is your question? It has one flaw though: it doesn't work if the number has less decimal places than specified by grade.
DataCamp
datacamp.com › tutorial › python-round-up
How to Round Up a Number in Python | DataCamp
July 22, 2024 - Rounding a number involves adjusting a number based on the value of the fraction part. Truncating a number removes the fractional part of the number without rounding. If you want to round down instead of rounding up in Python, you can use the math.floor() function.
W3Schools
w3schools.com › python › ref_func_round.asp
Python round() Function
Built-in Modules Random Module Requests Module Statistics Module Math Module cMath Module · Remove List Duplicates Reverse a String Add Two Numbers · Python Examples Python Compiler Python Exercises Python Quiz Python Challenges Python Server Python Syllabus Python Study Plan Python Interview Q&A Python Bootcamp Python Certificate Python Training ... The round() function returns a floating point number that is a rounded version of the specified number, with the specified number of decimals.
Python.org
discuss.python.org › python help
Trying to understand rounding - in python - - Python Help - Discussions on Python.org
June 17, 2023 - hello @all, I’m new here, pls. be tolerant if I harm habits I don’t know about, I’m working on bin-FP-math imprecisions, and was pointed by Steven D’Aprano that python is doing a good job - from a decimal POV - in rounding >>> round(0.30000000000000004, 16) 0.3 https://mail.gnome.org/archives/gnumeric-list/2021-July/msg00019.html ( where standard FP algorithms fail to 0.3000000000000001 reg. scaling up =0.30000000000000004 by 10^16 → 3000000000000000.5 ) searching in the forum I found th...
GeeksforGeeks
geeksforgeeks.org › python › how-to-round-numbers-in-python
How to Round Numbers in Python? - GeeksforGeeks
July 15, 2025 - If we want to round up to a specified decimal place, you can combine multiplication, math.ceil(), and division. python ·
RTEE Tech
blog.rteetech.com › home › development › python round up: complete guide to rounding numbers
Python Round Up | Complete Guide to Rounding Numbers
March 30, 2025 - If you want to perform division and round up without importing the math module, you can implement the logic using the following code: This code divides 7 by 2 and rounds up the result using a simple check to see if there’s any remainder in the division. If the remainder is greater than zero, it adds 1 to the result, effectively rounding up the value. If you’re new to Python or need additional resources to understand the concept of rounding, W3Schools is a great place to start.
GoLinuxCloud
golinuxcloud.com › home › python › python round up practical examples [5 methods]
Python round up practical examples [5 Methods] | GoLinuxCloud
November 16, 2021 - This is the simplest way to round up a floating number. All we need to do is to specify the number of decimal digits. The numpy round method is a mathematical function that rounds an array to the given number of decimals. For example, see the python program below, which uses the NumPy round method. ... # importing numpy module import numpy as np # defining numpy array Array = [1.1, 2.6, 4.6, 4.8, 10] # printing array without rounding print("Without rounding values: ", Array) # python round up and printing print ("Rounded values : ", np.round(Array))
FavTutor
favtutor.com › blogs › round-down-python
Round Down Numbers in Python (With Examples and Code)
September 3, 2022 - Learn what is round down and how to round down a number in python using 7 different methods along with examples and code.
Mimo
mimo.org › glossary › python › round-function
Python round(): Rounding Numbers in Python
If precision is critical, Python’s decimal module provides a way to avoid floating-point precision issues. The decimal module allows you to work with decimal numbers while avoiding the rounding errors of float numbers. ... from decimal import Decimal, ROUND_HALF_UP # Create Decimal objects instead of using floats num = Decimal('2.675') # Use the quantize() method to round to two decimal places with rounding mode ROUND_HALF_UP rounded_num = num.quantize(Decimal('0.01'), rounding=ROUND_HALF_UP) print(rounded_num) # Outputs: 2.68
JanBask Training
janbasktraining.com › community › python-python › ceil-and-floor-equivalent-in-python-3-without-math-module
Ceil and floor equivalent in Python 3 without Math module? | JanBask Training Community
August 18, 2025 - These methods avoid importing math, yet give you the same results. ... Hello,You can use the floor division operator //.This always rounds toward negative infinity, unlike int() which just chops off the decimal part.
Replit
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How to round up in Python
For example, -10 // 3 results in -4 instead of -3. The final negation flips the sign back, effectively rounding the original division up to the next whole number. It’s a concise way to get a ceiling result without importing the math module.
InterServer
interserver.net › home › programming › python round() function explained: examples, decimals, and best practices
Python round() Function Explained: Examples, Decimals, and Best Practices - Interserver Tips
October 1, 2025 - Scientists also round measurements to make data easier to compare. Python makes rounding numbers simple with its built-in round() function. This function can round numbers to the nearest whole number or to a specific number of decimal places. You don’t need to write long code or use complex math.