Free tool
Angel’s share estimator
Estimate aging loss from entry wine gallons, years in barrel, and an annual loss rate. Planning only — official gauges are what go on a TTB report.
How the estimate works. Each full year multiplies remaining volume by (1 − rate). A fractional year multiplies by (1 − rate × fraction). Example: 100 WG for 1.5 years at 2%/yr → 100 × 0.98 × 0.99 = 97.02 WG remaining.
Planning figures only. Official gauges are what belong on a TTB report. Not affiliated with or endorsed by TTB.