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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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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Table of Contents #
- Round a number to the nearest 500 in Python
- Round a number Up to the nearest 500 in Python
- 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:
- Call the
round[]
function passing it the number divided by500
. - Multiply the result by
500
. - 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.
Copied!
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.
Copied!
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:
- Divide the number by
500
and round the result to the nearest integer. - Multiply the result by
500
to get the number rounded to the nearest500
.
Round a number Up to the nearest 500 in Python #
To round a number up to the nearest 500:
- Call the
math.ceil[]
method passing it the number divided by500
. - Multiply the result by
500
. - 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.
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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:
- Divide the number by
500
and round the result up to the nearest integer. - Multiply the result by
500
to get the number rounded up to the nearest500
.
Round a Number Down to the nearest 500 in Python #
To round a number down to the nearest 500:
- Call the
math.floor[]
method passing it the number divided by500
. - Multiply the result by
500
. - 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.
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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:
- Divide
the number by
500
and round the result down to the nearest integer. - Multiply the result by
500
to get the number rounded down to the nearest500
.