Free tool
Go / No-Go Decision Aid
Enter today's ceiling, visibility, wind, and field, and check each factor against your own personal minimums. Every input is banded green, amber, or red — comfortable, inside your margin, or over the limit — and the most restrictive band sets an overall GO, CAUTION, or NO-GO. The crosswind component and density altitude are worked out for you from the wind, runway heading, and field data.
The method is the point: a value bands amber once it enters the last 20% before your limit and red when it crosses, and an unknown factor never bands green. The seeded minimums are a common light-single starting point — edit them to your airplane and your comfort. This is a decision aid for training and aeronautical decision-making, not a dispatch tool or a substitute for official weather and your own judgment.
Legal VFR minimums are not evaluated: no airspace class is selected. 14 CFR 91.155 prescribes a different flight visibility for each class and altitude band, so with none chosen no row of the table applies and guessing one would be worse than checking nothing.
14 CFR 91.155, 2026-08-17 issue — view on eCFR
Conditions
Enter the current weather and field, and the airspace class you'll be operating in. Wind direction and runway heading must share a reference — both magnetic (as tower reports and the runway number use) or both true.
Crosswind is the wind speed times the sine of the angle between the wind and the runway (the gust component is checked too); density altitude is pressure altitude corrected for temperature. Leave a field blank to mark it unknown — an unknown factor bands amber, never green.
Personal minimums
These seed a common light-single starting point — set your own. Each factor bands amber inside the last 20% before its limit and red once it is crossed.
Decision aid, not authority. This is for training and aeronautical-decision-making practice — not a dispatch tool and not a substitute for official weather, NOTAMs, your POH, or your own judgment. A GO here never obligates you to fly.
Free, no signup needed
Next step
- Personal minimums worksheet (printable)
- Decode the METAR first
- Crosswind components sim
- Class G night VFR minimums — a verified checkride question
- Find your weak areas — the free 24-question Readiness Test, scored by knowledge area.
- Create a free account for the full bank: 2,074 verified questions with the FAA source on every answer, a timed practice exam, and a missed-questions drill.
The Private Pilot Quick-Review Study Guide covers this in the aeronautical decision-making chapter. It is in CFI review and not on sale yet; the guide page has the list for launch notes.