Power Calculators

2️⃣ Even or Odd Number Calculator

Determine whether a whole number is even or odd using its remainder after division by 2.

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

📘 About the Even or Odd

Even numbers are exactly divisible by 2.

Odd numbers leave a remainder of 1 when positive whole numbers are divided by 2.

🧮 Formula

Parity remainder
r = n mod 2
Even condition
r = 0

Where

  • n = input number
  • r = n - floor(n/2) x 2
The input should be a whole number.

✏️ Worked example

42 is even

You enter
Number42
You get
Even Number1
Odd Number0
Remainder after Division by 20

42 leaves a remainder of 0 when divided by 2.

Try this example →

🧭 How to use this calculator

What you enter

  • Number

What you get

  • Even Number
  • Odd Number
  • Remainder after Division by 2

💡 Examples

  • 8 is even.
  • 15 is odd.
  • 0 is even.

❓ Frequently asked questions

Is zero even?

Yes. Zero is divisible by 2.

What makes a number odd?

An integer is odd when it is not divisible by 2.

Can this be used for decimals?

It is intended for integers.