Degree of Unsaturation Calculator

Find rings + double bonds from a molecular formula.

Degree of unsaturation 4

Formula: DoU = (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. Degree of unsaturation = 4

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Degrees of unsaturation count rings and π bonds in a molecule.

The math behind it

DoU = (2C + 2 + N − H − X) ÷ 2 (oxygen doesn't affect it).

Benzene C₆H₆ → DoU 4 (3 double bonds + 1 ring).

Each unit means?

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