½ Fraction Reciprocal Calculator

Find the reciprocal of a fraction and its decimal value.

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Enter details

Enter the numerator.
Denominator must not be zero.

Fill in the details and click Calculate to see your results.


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

📘 About the Fraction Reciprocal

Swap the numerator and denominator.

The original numerator must not be zero.

A non-zero denominator is also required.

🧮 Formula

Formula
Reciprocal of a/b = b/a
Reciprocal of a/b = b/a

✏️ Worked example

3/4

You enter
Numerator3
Denominator4
You get
Reciprocal Numerator4
Reciprocal Denominator3
Reciprocal Decimal1.33333

The reciprocal is 4/3, about 1.33333.

Try this example →

🧭 How to use this calculator

What you enter

  • NumeratorEnter the numerator.
  • DenominatorDenominator must not be zero.

What you get

  • Reciprocal Numerator
  • Reciprocal Denominator
  • Reciprocal Decimal

💡 Important notes

  • Zero has no reciprocal.
  • The reciprocal of a negative fraction is also negative.

❓ Frequently asked questions

What is a reciprocal?

It is the number that results from swapping numerator and denominator.

What is the reciprocal of 2/3?

It is 3/2.

Does zero have a reciprocal?

No.