Chemistry / CALCULATOR

Degree of Unsaturation

Degree of Unsaturation: explore an explicit model with input checks, a formula and a worked example.

Runs on your deviceUpdates as you typeFormula & example ↓
01

Your inputs

Adjust the values to explore a different result.

Enter carbon atoms.
Enter hydrogen atoms.
Enter nitrogen atoms.
Enter halogen atoms.

Formula

DBE=(2C+2+N−H−X)/2.
  • Use the units shown beside each field.
  • Results update automatically whenever you change an input.
  • Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
  • Neutral closed-shell formulas with ordinary C/H/N/halogen valences. Divalent oxygen and sulfur do not change this count. Not a structure identifier.

Example Calculation

Example inputs
  • Carbon atoms: 6
  • Hydrogen atoms: 6
  • Nitrogen atoms: 0
  • Halogen atoms: 0

C₆H₆ has DBE 4: for example, one ring and three double bonds.

Frequently asked questions

How do I use this calculator?

Enter carbon atoms, hydrogen atoms, nitrogen atoms, halogen atoms. The result updates automatically. Use Reset to restore the example values.

What method does it use?

DBE=(2C+2+N−H−X)/2.. Neutral closed-shell formulas with ordinary C/H/N/halogen valences. Divalent oxygen and sulfur do not change this count. Not a structure identifier.

Why might a rounded result differ?

The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.

Are my inputs saved online?

No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.

Check the assumptions and units before using this result. Read about calculation methods.