1 - Your trip
2 - Rockets
Firework flight duration
Boost lasts about 50 ticks (2.5 s) = roughly 83.75 blocks per rocket.
3 - Durability
Unbreaking level
Elytra drain 1 durability per second airborne, so the full 432 points last 7 min 12 s in the air. With Mending, every experience point you pick up repairs 2 durability, so a Mending elytra effectively never wears out if you collect XP between flights.
Results
14firework rockets12 without the 10% margin | flight duration 3Assumptions
Level flight at 33.5 blocks per second with rockets fired back to back; each boost lasts 10 x (2 + flight duration) game ticks. Coasting between boosts stretches every rocket further, so the base count is a comfortable upper bound for flat trips; the 10% margin covers climbing, detours and mistimed rockets. Durability drains 1 point per second airborne (with Unbreaking, one point lasts about level + 1 seconds) and elytra stop working at 1 durability, but are never destroyed. Numbers from the Minecraft Wiki for current Java Edition.
A firework rocket boosts an elytra flier to 33.5 blocks per second for about 10 x (2 + flight duration) game ticks, so one duration 3 rocket covers roughly 84 blocks of level flight. Flying rockets back to back, 1,000 blocks takes about 12 duration 3 rockets, 15 duration 2 rockets, or 20 duration 1 rockets.
The flight duration on a rocket comes from the gunpowder used to craft it: 1 paper plus 1, 2 or 3 gunpowder yields 3 rockets of duration 1, 2 or 3. Every rocket hits the same 33.5 blocks per second top speed, higher durations just hold it longer: 50.25 blocks per duration 1 rocket versus 83.75 per duration 3 rocket. Duration 3 means the fewest rockets to fire and carry (12 versus 20 per 1,000 blocks), while duration 1 is actually the cheapest in gunpowder (about 7 gunpowder per 1,000 blocks versus 12 for duration 3), so pick by whether gunpowder or inventory space is your bottleneck.
These counts are a comfortable baseline for flat, level flight. You keep momentum after each boost ends, so coasting between rockets stretches every rocket further; climbing for altitude, weaving around terrain, and mistimed boosts eat rockets instead. The calculator's 10% safety margin covers that comfortably for normal overworld trips.
| Flight duration | Boost time | Blocks per rocket | Rockets per 1,000 blocks | With 10% margin |
|---|---|---|---|---|
| Duration 1 | 1.5 s (~30 ticks) | 50.25 | 20 | 22 |
| Duration 2 | 2.0 s (~40 ticks) | 67 | 15 | 17 |
| Duration 3 | 2.5 s (~50 ticks) | 83.75 | 12 | 14 |
One warning: only boost with plain rockets. A rocket crafted with a firework star explodes and damages you mid-air. Plain paper-and-gunpowder rockets are harmless, and boosting does not cost any extra elytra durability beyond the normal 1 point per second of airborne time.
Elytra have 432 durability and lose 1 point for every second spent gliding, so an unenchanted pair lasts exactly 7 minutes 12 seconds in the air, about 14,472 blocks of rocket-powered flight. Unbreaking gives each point a chance to be ignored, which averages out to about level + 1 seconds per point. When durability hits 1 the wings stop working until repaired, but they are never destroyed, so you cannot lose them to wear.
| Enchantment | Seconds per point | Total flight time | Powered distance (blocks) |
|---|---|---|---|
| None | 1 s | 7 min 12 s | 14,472 |
| Unbreaking I | 2 s | 14 min 24 s | 28,944 |
| Unbreaking II | 3 s | 21 min 36 s | 43,416 |
| Unbreaking III | 4 s | 28 min 48 s | 57,888 |
Mending changes the math entirely: every experience point you collect repairs 2 durability while the elytra are equipped. A Mending + Unbreaking III pair maintained with an XP farm or a few bottles o' enchanting effectively never wears out, which is why that combination is the standard endgame setup.
At the optimal pitch, aiming straight at the horizon, elytra cover about 10.06 blocks forward per block of height while sinking about 1.5 blocks per second. Steeper glides follow range = height / tan(glide angle), so a casual 15 degree descent manages only about 3.73:1, which is why pitch control matters more than launch height for long unpowered flights.
| Starting height | Optimal glide (10.06:1) | Casual 15 degree glide | Time aloft |
|---|---|---|---|
| 64 | 644 | 239 | 43 s |
| 100 | 1,006 | 373 | 67 s |
| 192 | 1,932 | 717 | 2 min 8 s |
| 256 | 2,575 | 955 | 2 min 51 s |
| 320 | 3,219 | 1,194 | 3 min 33 s |
Practical takeaways: launching from a max-height perch at Y 320 over sea level gets you about 3,200 blocks for free, jumping off a mountain at Y 192 about 1,900, and even a modest 64 block tower clears 600 blocks. Dipping into a dive and pulling up trades altitude for a burst of speed but always loses total range compared with holding the shallow pitch.
About 12 flight duration 3 rockets, 15 duration 2 rockets, or 20 duration 1 rockets, fired back to back in level flight. Each duration 3 rocket boosts you to 33.5 blocks per second for about 2.5 seconds, which is roughly 84 blocks. Carry about 10% extra to cover climbing, detours and mistimed boosts: 14, 17 and 22 rockets respectively.
A rocket's flight lasts about 10 x (2 + flight duration) game ticks: roughly 30 ticks (1.5 seconds) for duration 1, 40 ticks (2 seconds) for duration 2 and 50 ticks (2.5 seconds) for duration 3. While boosted you travel at 33.5 blocks per second in the direction you are facing.
Chaining boosts in level flight, 64 duration 3 rockets cover about 5,360 blocks, 64 duration 2 rockets about 4,288 blocks, and 64 duration 1 rockets about 3,216 blocks. Coasting and gliding between boosts stretches those numbers further in practice.
Elytra have 432 durability and lose 1 point per second of gliding, which is 7 minutes 12 seconds of airborne time. Unbreaking stretches each point to about level + 1 seconds, so Unbreaking III gives about 28 minutes 48 seconds. At 1 durability the elytra stop working until repaired, but they are never destroyed.
Plain rockets crafted from paper and gunpowder are completely safe to boost with, and using them does not cost extra elytra durability. Only rockets crafted with a firework star explode and deal damage, so never boost with star rockets.
At the optimal shallow pitch, aiming at the horizon, elytra cover about 10.06 blocks forward for every block of height lost, sinking about 1.5 blocks per second. From a height of 100 blocks that is roughly 1,006 blocks of glide. A steeper, easier-to-hold 15 degree glide manages only about 3.73 blocks per block of height.
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