To calculate \(2^{-3}\), you can use the property of exponents that states \(a^{-n} = \frac{1}{a^n}\).
So,
\[ 2^{-3} = \frac{1}{2^3} \]
Now calculate \(2^3\):
\[ 2^3 = 2 \times 2 \times 2 = 8 \]
Thus,
\[ 2^{-3} = \frac{1}{8} \]
Therefore, \(2^{-3} = \frac{1}{8}\) or 0.125.