Glide Distance in Wind Calculator
The glide that wind bends: range up- and downwind from the same height, with the speed-to-fly adjustment that recovers part of the headwind loss.
A 20-kt wind turns a symmetric 7.4-nm circle into 9.6 downwind and 5.2 upwind — the 'gliding range ring' on modern avionics is an egg, not a circle. Rule of thumb into wind: add half the headwind to best-glide speed.
Formula
⚠️ For flight planning and education only — verify with your POH/AFM and official sources. Not for primary navigation or in-flight emergency decision-making without POH data.
The glide that wind bends: range up- and downwind from the same height, with the speed-to-fly adjustment that recovers part of the headwind loss.
About Glide Distance in Wind Calculator
Engine-out range rings on glass cockpits are eggs, not circles, and this calculator shows why: the same height glides (Vg+wind)/Vg farther downwind and (Vg−wind)/Vg shorter into it — a 20-knot wind nearly doubles the difference between the two directions. It also carries the soaring world's gift to power pilots: flying slightly faster than best glide into a headwind (about half the wind added) recovers part of the loss, because reaching the ground later isn't the goal — reaching the field is.
How to use Glide Distance in Wind Calculator
- 1Enter — sensible defaults are pre-filled so you see a worked result immediately.
- 2Read the live results: .
- 3Check the "With your numbers" line to see the formula range = still-air glide × (Vg ± wind)/Vg; upwind speed-to-fly ≈ Vg + half the headwind substituted step by step.
- 4Adjust inputs (or flip the unit toggle) until the scenario matches yours, then copy or share the result.
Why use Glide Distance in Wind Calculator?
- ✓Instant, free and private — every calculation runs in your browser, nothing is uploaded
- ✓Built on the published formula range = still-air glide × (Vg ± wind)/Vg; upwind speed-to-fly ≈ Vg + half the headwind with sources cited on the page
- ✓A 20-kt wind turns a symmetric 7.4-nm circle into 9.6 downwind and 5.2 upwind — the 'gliding range ring' on modern avionics is an egg, not a circle. Rule of thumb into wind: add half the headwind to best-glide speed.
- ✓Switch units, tweak any input and watch every result update live
Frequently asked questions
Why fly FASTER than best glide into a headwind?+
Best-glide speed maximizes air distance; into a headwind, air distance isn't what saves you — ground distance is. Flying faster steepens the path through the air but spends less time being blown backward, and the optimum (from MacCready theory) sits near Vg plus half the headwind for typical singles. The improvement is a few percent — worth having when the field is at the margin.
How should wind shape my engine-out field choice?+
Prefer the downwind option at equal distances — it's effectively closer (this tool's ratio output quantifies how much). The egg-shaped reachable footprint also argues for cruising offset upwind of the best terrain: fields upwind of you are the expensive direction. Glass-cockpit range rings draw this continuously; the mental version is 'the wind moves my circle downwind by its speed times my descent time.'
Does the tailwind help the landing too?+
It helps the GLIDE and hurts the LANDING — arriving with 20 knots of tailwind at a short field trades the range gained for touchdown energy squared. The full engine-out judgment is reach the field, then land into wind if altitude permits a pattern: the classic compromise is gliding downwind to the field's vicinity and spending surplus height turning into wind for the touchdown.
What about sink and lift along the way?+
Vertical air motion changes the arithmetic exactly like wind changes the horizontal: 500 fpm of sink against a ~700 fpm glide descent rate costs ~40% of your range while it lasts. Mountain lee sides, rain shafts and the sunny side of ridgelines all sign the ledger. The still-air number is the centerline of a distribution — another voice for the two-thirds planning discount.
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