Most discs carry four flight numbers. Speed (1 to 14) is how fast the disc must be thrown to fly as designed. Glide (1 to 7) is how well it holds the air. Turn (+1 to -5) is how much it drifts right early in flight for a right-handed backhand throw; more negative means more turn. Fade (0 to 5) is how hard it hooks left at the end. Beginners do best with lower speed, more glide, some negative turn and low fade.
Flight numbers are a shorthand for how a disc flies. Here is how to read them, assuming a right-handed backhand throw (flip left and right for left-handed or forehand throws).
The four numbers
| Number | Range | What it means |
|---|---|---|
| Speed | 1 to 14 | Arm speed needed for the disc to fly as designed |
| Glide | 1 to 7 | How long it stays in the air |
| Turn | +1 to -5 | Early drift to the right; more negative turns more |
| Fade | 0 to 5 | Late hook to the left; higher fades harder |
Stability
| Term | Typical numbers | Flight |
|---|---|---|
| Understable | Turn -2 or lower, low fade | Drifts right, then straight |
| Stable | Turn around 0 to -1 | Straight, gentle fade |
| Overstable | Turn 0 or positive, fade 3+ | Hooks left reliably |
Why speed matters
A high-speed driver thrown slowly will not reach its turn and will fade left early. Most new players throw farther with a fairway driver than a distance driver.
Related: putter vs midrange vs driver and choosing discs as a beginner.
Common questions
What flight numbers are best for beginners?
Look for speed under 9, glide of 4 or more, turn around -1 to -3 and fade of 1 or 2. Those discs fly straighter at slower arm speeds.
What does overstable mean?
An overstable disc resists turning and fades hard. A positive turn or high fade number usually means overstable.
Are flight numbers the same across brands?
The four-number format is shared, but each brand rates its own discs, so compare within a brand when you can.