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Convert.ToDecimal Method (Double)

Converts the value of the specified double-precision floating-point number to an equivalent decimal number.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public static decimal ToDecimal(
	double value
)

Parameters

value
Type: System.Double

The double-precision floating-point number to convert.

Return Value

Type: System.Decimal
A decimal number that is equivalent to value.

ExceptionCondition
OverflowException

value is greater than Decimal.MaxValue or less than Decimal.MinValue.

The Decimal value returned by this method contains a maximum of 15 significant digits. If the value parameter contains more than 15 significant digits, it is rounded using rounding to nearest. The following example illustrates how the Convert.ToDecimal(Double) method uses rounding to nearest to return a Decimal value with 15 significant digits.

Console.WriteLine(Convert.ToDecimal(123456789012345500.12D));  // Displays 123456789012346000
Console.WriteLine(Convert.ToDecimal(123456789012346500.12D));  // Displays 123456789012346000

Console.WriteLine(Convert.ToDecimal(10030.12345678905D));      // Displays 10030.123456789 
Console.WriteLine(Convert.ToDecimal(10030.12345678915D));      // Displays 10030.1234567892

The following example converts a Double value to a Decimal value.

		public void ConvertDoubleDecimal(decimal decimalVal){
			
			double doubleVal;
			
			// Decimal to double conversion cannot overflow.
         doubleVal = System.Convert.ToDouble(decimalVal);
			System.Console.WriteLine("{0} as a double is: {1}",
					decimalVal, doubleVal);

			// Conversion from double to decimal can overflow. 
			try 
         {
			   decimalVal = System.Convert.ToDecimal(doubleVal);
   			System.Console.WriteLine ("{0} as a decimal is: {1}",
	   			doubleVal, decimalVal);
			} 
			catch (System.OverflowException) {
				System.Console.WriteLine(
					"Overflow in double-to-double conversion.");
			}
			

		}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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