½ Fraction Reciprocal Calculator

Find the reciprocal of a fraction and its decimal value.

No ratings yet — be the first
Rate it: ★ ★ ★ ★ ★

Enter details

Enter the numerator.
Denominator must not be zero.
Reciprocal Numerator
4
Reciprocal Denominator
3
Reciprocal Decimal
1.33333

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.