Data Type Summary

VBE HELP:  Contents, Visual Basic Language Reference, Groups,  Data Type Summary

The following table shows the supported data types, including storage sizes and ranges.

Data type

Storage size



1 byte

0 to 255


2 bytes

True or False


2 bytes

-32,768 to 32,767

(long integer)

4 bytes

-2,147,483,648 to 2,147,483,647

(single-precision floating-point)

4 bytes

-3.402823E38 to -1.401298E-45 for negative values;
1.401298E-45 to 3.402823E38 for positive values

(double-precision floating-point)

8 bytes

-1.79769313486231E308 to
-4.94065645841247E-324 for negative values; 4.94065645841247E-324 to 1.79769313486232E308 for positive values

(scaled integer)

8 bytes

-922,337,203,685,477.5808 to 922,337,203,685,477.5807


14 bytes

+/-79,228,162,514,264,337,593,543,950,335 with no decimal point;
+/-7.9228162514264337593543950335 with 28 places to the right of the decimal;
smallest non-zero number is +/-0.0000000000000000000000000001


8 bytes

January 1, 100 to December 31, 9999


4 bytes

Any Object reference


10 bytes + string length

0 to approximately 2 billion


Length of string

1 to approximately 65,400

(with numbers)

16 bytes

Any numeric value up to the range of a Double

(with characters)

22 bytes + string length

Same range as for variable-length String

(using Type)

Number required by elements

The range of each element is the same as the range of its data type.


Note   Arrays of any data type require 20 bytes of memory plus 4 bytes for each array dimension plus the number of bytes occupied by the data itself.  The memory occupied by the data can be calculated by multiplying the number of data elements by the size of each element.

For example, the data in a single-dimension array consisting of 4 Long data elements of 2 bytes each occupies 8 bytes.  The 8 bytes required for the data plus the 24 bytes of overhead brings the total memory requirement for the array to 32 bytes.

A Variant containing an array requires 12 bytes more than the array alone.

Note   Use the StrConv function to convert one type of string data to another.


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