Chemistry

Double Bond Equivalent Calculator

Count rings + π bonds in a molecule.

Calculated Output

Double bond equivalent 4

Formula: DBE = (2C + 2 + N − H − X) ÷ 2

Step-by-Step Breakdown

1. Values used:

2. Carbon (C) = 6

3. Hydrogen (H) = 6

4. Nitrogen (N) = 0

5. Halogens (X) = 0

7. Double bond equivalent = 4

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The math behind it

DBE = (2C + 2 + N − H − X) ÷ 2. Oxygen and sulfur don't affect it.

Benzene C₆H₆ → DBE 4.

Each DBE?

One ring or one double bond (a triple bond counts as two).