About this calculator

In Cognac and Armagnac cellars, ~2% of the volume evaporates each year ('la part des anges') — slightly less in humid Charente cellars, more in dry. ABV drops by ~0.3%/yr.

Frequently asked questions

What does the Cognac Angel's Share Calculator do?

Remaining volume and ABV after years of barrel ageing — the part lost to evaporation. In Cognac and Armagnac cellars, ~2% of the volume evaporates each year ('la part des anges') — slightly less in humid Charente cellars, more in dry. ABV drops by ~0.3%/yr.

Is the Cognac Angel's Share Calculator free to use?

Yes. Every calculator on Calcurly.com is free, works in your browser without sign-up, and can be embedded on your own website.

How accurate is the Cognac Angel's Share Calculator?

Results are calculated in real time using industry-standard formulas. Treat the output as a well-informed estimate — always cross-check with local regulations, product datasheets, or a qualified cognac & armagnac professional before committing to a purchase or a job.

What inputs does the Cognac Angel's Share Calculator need?

Enter values for: Filled volume (L), Starting ABV (%), Years aged. Sensible defaults are pre-filled where possible so you can start with a single change.

Can I embed the Cognac Angel's Share Calculator on my own website?

Yes — copy the iframe snippet at the bottom of this page, or use the Embed Generator to customise the size. The embedded version stays in sync with the live calculator on Calcurly.com.