Reciprocal Calculator
Find the multiplicative inverse of a nonzero real number. Negative numbers keep their sign.
Formula
Reciprocal of x = 1/x, with x ≠ 0.
Reciprocal 1/x ≈ 1÷(4)
How to use
- Enter a nonzero number.
- Use a negative sign when needed.
- Read the reciprocal; multiplying it by the original gives 1.
Examples
- The reciprocal of 4 is 0.25; of −2 it is −0.5.
Frequently asked questions
Can zero have a reciprocal?
No. No finite number multiplied by zero equals 1.
Is the reciprocal the negative?
No. The negative of 4 is −4, but its reciprocal is 1/4.
What about a fraction?
Enter its decimal value when terminating; for a/b the reciprocal is b/a.
Sources
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