Power Calculators

1/x Reciprocal Calculator

Calculate the reciprocal of a number by finding its multiplicative inverse.

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Enter details

Enter a non-zero number.
Reciprocal
0.125

Also available in our Android app, with charts and full breakdown tables.

📘 About the Reciprocal

The reciprocal is the multiplicative inverse of a non-zero number.

For example, the reciprocal of 4 is 1/4 and the reciprocal of -2 is -1/2.

🧮 Formula

Multiplicative inverse
Reciprocal = 1 ÷ x

Where

  • x = input number
The input must be non-zero for a defined reciprocal.

✏️ Worked example

Reciprocal of 8

You enter
Number8
You get
Reciprocal0.125

The reciprocal is 0.125.

Try this example →

🧭 How to use this calculator

What you enter

  • NumberEnter a non-zero number.

What you get

  • Reciprocal

💡 Important condition

  • Zero has no reciprocal because division by zero is undefined.
  • The reciprocal keeps the sign of a non-zero number.

❓ Frequently asked questions

What is the reciprocal of a number?

It is 1 divided by that number.

Does zero have a reciprocal?

No. Division by zero is undefined.