Rounding To “n” Significant Digits
Excel includes three functions (ROUND, ROUNDUP, and ROUNDDOWN) that round values to a specified number of digits. In some cases, however, you may need to round a value to a specified number of significant digits.
For example, you might want to express the value 1,432,187 in terms of two significant digits (that is, as 1,400,000). Here's an elegant solution. The formula below rounds the value in cell A1 to the number of significant digits specified in cell A2:
Excel has a long history, and it continues to evolve and change. Consequently, the tips provided here do not necessarily apply to all versions of Excel.
In particular, the user interface for Excel 2007 (and later), is vastly different from its predecessors. Therefore, the menu commands listed in older tips, will not correspond to the Excel 2007 (and later) user interface.
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