Flight Category Checker
Determine VFR, MVFR, IFR, or LIFR flight category from ceiling height and visibility. The most restrictive factor determines the overall category. A ceiling is the lowest broken or overcast cloud layer (not few or scattered).
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Flight Category Thresholds
| Category | Ceiling (ft AGL) | Visibility (SM) |
|---|---|---|
| VFR | > 3,000 | > 5 |
| MVFR | 1,000 – 3,000 | 3 – 5 |
| IFR | 500 – 999 | 1 – < 3 |
| LIFR | < 500 | < 1 |
Ceiling vs. Cloud Layer
A ceiling is the lowest layer of clouds reported as broken (BKN) or overcast (OVC). Few (FEW) and scattered (SCT) cloud layers are not considered a ceiling. When determining flight category, only the ceiling matters for the cloud component — not individual scattered layers.
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Frequently Asked Questions
Flight category is based on the values you enter. Always use official weather sources (METARs, TAFs, 1800wxbrief.com) for actual conditions. Weather can change rapidly. This tool is not a substitute for a proper weather briefing.
Last reviewed: July 2026
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