Round to nearest 500 python

I'm looking to find a way to round up to the nearest 500.I've been using:

math.ceil(round(8334.00256 + 250, -3))

Whereby I have a value from a scale in a map I am making in ArcGIS. I have the ability to read and write the scale factor (i.e. 1:8334....basically, you set the thousandth and it defaults to a ratio) If the scale factor isn't a factor of 500, I want to round up to the next 500. The math.ceil will round up any decimal value, and the round(n,-3) will round to the nearest thousandth, but I'm struggling to find a way to round to the nearest 500.

Any suggestions? Thanks, Mike

asked Mar 21, 2012 at 18:11

0

Scale, round, unscale:

round(x / 500.0) * 500.0

Edit: To round up to the next multiple of 500, use the same logic with math.ceil() instead of round():

math.ceil(x / 500.0) * 500.0

answered Mar 21, 2012 at 18:12

Sven MarnachSven Marnach

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6

I personally find rounding a but messy. I'd rather use:

(x+250)//500*500

// means integer division.

EDIT: Oh, I missed that you round "up". Then maybe

-(-x//500)*500

answered Mar 21, 2012 at 18:20

GerenukGerenuk

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Maybe something like this:

round(float(x) / 500) * 500

The "float" conversion is unnecessary if you are using Python 3 or later, or if you run the statement from __future__ import division for sane integer division.

answered Mar 21, 2012 at 18:12

Elias ZamariaElias Zamaria

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2

Table of Contents #

1. Round a number to the nearest 500 in Python
2. Round a number Up to the nearest 500 in Python
3. Round a Number Down to the nearest 500 in Python

Round a number to the nearest 500 in Python #

To round a number to the nearest 500:

1. Call the round() function passing it the number divided by 500.
2. Multiply the result by 500.
3. The result of the calculation is the number rounded to the nearest 500.

Copied!
import math


# ✅ Round number to nearest 500

def round_to_nearest_500(num):
    return round(num / 500) * 500


print(round_to_nearest_500(777))  # 👉️ 1000
print(round_to_nearest_500(1))  # 👉️ 0
print(round_to_nearest_500(1400))  # 👉️ 1500

# --------------------------------------

# ✅ Round number UP to nearest 500


def round_up_to_nearest_500(num):
    return math.ceil(num / 500) * 500


print(round_up_to_nearest_500(640))  # 👉️ 1000
print(round_up_to_nearest_500(1))  # 👉️ 500

# --------------------------------------

# ✅ Round number DOWN to nearest 500


def round_down_to_nearest_500(num):
    return math.floor(num / 500) * 500


print(round_down_to_nearest_500(999))  # 👉️ 500
print(round_down_to_nearest_500(1840))  # 👉️ 1500

We used the round() function to round a number to the nearest 500.

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

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print(round(13.4))  # 👉️ 13
print(round(13.6))  # 👉️ 14

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

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print(1750 / 500)  # 👉️ 3.5
print(1400 / 500)  # 👉️ 2.8

print(round(1750 / 500))  # 👉️ 4
print(round(1400 / 500))  # 👉️ 3

print(round(1750 / 500) * 500)  # 👉️ 2000
print(round(1400 / 500) * 500)  # 👉️ 1500

This is a two step process:

1. Divide the number by 500 and round the result to the nearest integer.
2. Multiply the result by 500 to get the number rounded to the nearest 500.

Round a number Up to the nearest 500 in Python #

To round a number up to the nearest 500:

1. Call the math.ceil() method passing it the number divided by 500.
2. Multiply the result by 500.
3. The result of the calculation is the number rounded up to the nearest 500.

Copied!
import math


def round_up_to_nearest_500(num):
    return math.ceil(num / 500) * 500


print(round_up_to_nearest_500(640))  # 👉️ 1000
print(round_up_to_nearest_500(1))  # 👉️ 500

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

Copied!
import math

print(math.ceil(456.001))  # 👉️ 457
print(math.ceil(456.999))  # 👉️ 457

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 hundred.

Copied!
import math


print(1346 / 500)  # 👉️ 2.692
print(1600 / 500)  # 👉️ 3.2

print(math.ceil(1346 / 500))  # 👉️ 3
print(math.ceil(1600 / 500))  # 👉️ 4

print(math.ceil(1346 / 500) * 500)  # 👉️ 1500
print(math.ceil(1600 / 500) * 500)  # 👉️ 2000

This is a two step process:

1. Divide the number by 500 and round the result up to the nearest integer.
2. Multiply the result by 500 to get the number rounded up to the nearest 500.

Round a Number Down to the nearest 500 in Python #

To round a number down to the nearest 500:

1. Call the math.floor() method passing it the number divided by 500.
2. Multiply the result by 500.
3. The result of the calculation is the number rounded down to the nearest 500.

Copied!
import math


def round_down_to_nearest_500(num):
    return math.floor(num / 500) * 500


print(round_down_to_nearest_500(999))  # 👉️ 500
print(round_down_to_nearest_500(1840))  # 👉️ 1500
print(round_down_to_nearest_500(2840))  # 👉️ 2500

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

Copied!
import math

print(math.floor(25.999))  # 👉️ 25
print(math.floor(25.001))  # 👉️ 25

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 500.

Copied!
import math

print(4880 / 500)  # 👉️ 9.76
print(2510 / 500)  # 👉️ 5.02

print(math.floor(4880 / 500))  # 👉️ 9
print(math.floor(2510 / 500))  # 👉️ 5

print(math.floor(4880 / 500) * 500)  # 👉️ 4500
print(math.floor(2510 / 500) * 500)  # 👉️ 2500

This is a two step process:

1. Divide the number by 500 and round the result down to the nearest integer.
2. Multiply the result by 500 to get the number rounded down to the nearest 500.

How do you round to the nearest 500 in Python?

How do you round a number to the nearest 500?

How do you round to hundreds in Python?

How do you round to the nearest number in Python?