The multiplicative inverse of a number is simply its reciprocal. It's the number you have to multiply by to get 1.

• For an integer or decimal n, the inverse is 1/n.
• For a fraction a/b, the inverse is b/a.
• For a mixed number, first convert it to an improper fraction, then find its inverse.

The number 0 does not have a multiplicative inverse.

Disclaimer: This calculator is for educational purposes only. Please verify all results for critical applications.