Exponents in Excel represent one of those cases in which Excel expects to see something a bit different than we humans expect to see. Excel recognizes exponents when expressed as a Base^Power formula. To make an exponent appear so a human can readily identify it, use a superscript.
The Base^Power formula in Excel is relatively straightforward. Always proceed a Base^Power formula with an =, just like any other formula.
- =: All Excel formulas begin with the equal sign.
- Base: the base number. It's the 10 in 102.
- ^: called a caret. Press Shift-6 on most keyboards.
- Power: the power number, or exponent. It's the 2 in 102.
For example, 10 to the power of 2 is =10^2. As soon as you press Enter after entering a Base^Power formula, Excel calculates the formula.
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Alternatively, you can enter exponents as a POWER function by entering the base number and the exponent in parentheses . Ten-squared, for example is =POWER(10,2).
Writing Text-Based Exponents
Highlight the cells that will be hosting exponents for humans to read. Click the Home menu and change the Number Format menu to Text.
Type the base number, followed by the exponent, without a space. Highlight the exponent with the cursor.
Click the Home tab once again, then click the Expansion Arrow in the ribbon's Font section. The Format Cells window opens.
Click the Superscript option in the Format Cells window. As a superscript, the exponent is readily identified for what it is.
Click OK to close the Format Cells window. The number now looks like a regular exponent. Note that text cells have small red markers in the corner to remind you that they can't be used as numbers as far as Excel is concerned. Excel treats them as if they contained a zero.
When you enter a large exponent in Excel using the Base^Power formula, Excel displays it in scientific notation, as exponential notation. For example 10^100 appears as 1E+100.