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Convert.ToDouble Method (Single)

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

Namespace:  System
Assemblies:   System.Runtime.Extensions (in System.Runtime.Extensions.dll)
  mscorlib (in mscorlib.dll)

public static double ToDouble(
	float value
)

Parameters

value
Type: System.Single

The single-precision floating-point number.

Return Value

Type: System.Double
A double-precision floating-point number that is equivalent to value.

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

		public void CovertDoubleFloat(double doubleVal) {	
			float floatVal = 0;

			// Double to float conversion cannot overflow.
				floatVal = System.Convert.ToSingle(doubleVal);
				System.Console.WriteLine("{0} as a float is {1}",
					doubleVal, floatVal);

			// Conversion from float to double cannot overflow.
			doubleVal = System.Convert.ToDouble(floatVal);
			System.Console.WriteLine("{0} as a double is: {1}",
				floatVal, doubleVal);
		}

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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