Double Bond Equivalent Calculator

Count rings + π bonds in a molecule.

Double bond equivalent 4

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

Step-by-step with your numbers:

1. Values used:

2. Carbon (C) = 6

3. Hydrogen (H) = 6

4. Nitrogen (N) = 0

5. Halogens (X) = 0

7. Double bond equivalent = 4

Did we solve your problem today?

DBE (degrees of unsaturation) counts rings and π bonds from a formula.

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).