Convert.ToDouble Method (Byte)


The .NET API Reference documentation has a new home. Visit the .NET API Browser on to see the new experience.

Converts the value of the specified 8-bit unsigned integer to the equivalent double-precision floating-point number.

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

public static double ToDouble(
	byte value


Type: System.Byte

The 8-bit unsigned integer to convert.

Return Value

Type: System.Double

The double-precision floating-point number that is equivalent to value.

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

public void ConvertDoubleByte(double doubleVal) {
	byte	byteVal = 0;

	// Double to byte conversion can overflow.
	try {
		byteVal = System.Convert.ToByte(doubleVal);
		System.Console.WriteLine("{0} as a byte is: {1}.",
			doubleVal, byteVal);
	catch (System.OverflowException) {
			"Overflow in double-to-byte conversion.");

	// Byte to double conversion cannot overflow.
	doubleVal = System.Convert.ToDouble(byteVal);
	System.Console.WriteLine("{0} as a double is: {1}.",
		byteVal, doubleVal);

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Return to top