How to Round to the Nearest Whole Number in C#

How to Round to the nearest whole number in C#

See the official documentation for more. For example:

Basically you give the Math.Round method three parameters.

  1. The value you want to round.
  2. The number of decimals you want to keep after the value.
  3. An optional parameter you can invoke to use AwayFromZero rounding. (ignored unless rounding is ambiguous, e.g. 1.5)

Sample code:

var roundedA = Math.Round(1.1, 0); // Output: 1
var roundedB = Math.Round(1.5, 0, MidpointRounding.AwayFromZero); // Output: 2
var roundedC = Math.Round(1.9, 0); // Output: 2
var roundedD = Math.Round(2.5, 0); // Output: 2
var roundedE = Math.Round(2.5, 0, MidpointRounding.AwayFromZero); // Output: 3
var roundedF = Math.Round(3.49, 0, MidpointRounding.AwayFromZero); // Output: 3

Live Demo

You need MidpointRounding.AwayFromZero if you want a .5 value to be rounded up. Unfortunately this isn't the default behavior for Math.Round(). If using MidpointRounding.ToEven (the default) the value is rounded to the nearest even number (1.5 is rounded to 2, but 2.5 is also rounded to 2).

C# - Rounding Down to Nearest Integer

Just try this..

 int interval = Convert.ToInt32(Math.Floor(different/increment));

How to round up decimal value to the nearest whole number?

You can use Math.Ceiling

decimal fees = Math.Ceiling(30 * 0.005M);

How do i round to the nearest whole number

When you want to round, just round:

  double source = 1534488.74496255;

// if you want double (i.e. floating point result)
double result = Math.Round(source);

// if you want integer outcome (and source is positive)
int minutes = (int) (source + 0.5);

// if you want integer outcome (general case)
int minutes = (int) (source > 0 ? source + 0.5 : source - 0.5);

How to round up value C# to the nearest integer?

Use Math.Ceiling to round up

Math.Ceiling(0.5); // 1

Use Math.Round to just round

Math.Round(0.5, MidpointRounding.AwayFromZero); // 1

And Math.Floor to round down

Math.Floor(0.5); // 0

Round to the nearest whole number

Since you have fewer than 309 digits after the dot your number is a whole number. The scientific notation must be confusing you, for example 1.234e+003 is also an integer because it's equal to 1234.

How do I round a float upwards to the nearest int in C#?

If you want to round to the nearest int:

int rounded = (int)Math.Round(precise, 0);

You can also use:

int rounded = Convert.ToInt32(precise);

Which will use Math.Round(x, 0); to round and cast for you. It looks neater but is slightly less clear IMO.


If you want to round up:

int roundedUp = (int)Math.Ceiling(precise);

Get average to closest whole number

You can get the nearest number do like this.

decimal d = 1.75M;
var ceiling = Math.Ceiling(d);
var floor = Math.Floor(d);

var closest = ceiling - d < d - floor ? ceiling : floor;

x.5 should have to be taken care of separately .

You can also use Math.Round()

How to round a integer to the close hundred?

Try the Math.Round method. Here's how:

Math.Round(76d / 100d, 0) * 100;
Math.Round(121d / 100d, 0) * 100;
Math.Round(9660d / 100d, 0) * 100;


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