What does it cost to level Engineering right now?

65.3kg in reagents at today's EU auction prices, over about 122 crafts. Sell the results and it comes back to 64.8kg.

Where do these numbers come from?

The skill thresholds are read from the game client data for build 12.1.0.68914. The prices are the region-wide auction house, refreshed every few minutes; these are the snapshot taken at 02:31 UTC.

Why does the route change when I reload?

Because the prices did. The cheapest recipe for a stretch of skill is whichever one's reagents are cheapest at that moment, and that moves through the day.

Profession leveling · Khaz Algar Engineering · EU · prices as of 02:31 UTC

Engineering leveling 1 → 120 · Khaz Algar Engineering

65.3kg in reagents over about 122 crafts. Sell what you make and it comes back to 64.8kg.

Start skill

Trainer recipes only

Recipe names carry the colour the profession window gives them: orange is a point every craft, yellow is three in four, green is one in four.

Before the first craft — buy it all at once

One trip to the auction house. Vendor lines are cheaper from the profession vendor than from the board.

ReagentNeedEachTotal

Handful of Bismuth Bolts×222613

31,052

×222631,052

Whimsical Wiring×61220

Entropy Enhancer×5040

Stunning Sapphire×508

Crystalline Powder×1733

×175

Total65,273

Step 1 · Skill 1 → 17

Orange→Yellow

Bottled Brilliance

researchfirst craft: +Knowledge

About 17 crafts.142

per skill point8

Leyline Residue×34

Crystalline Powder×17

Gilded Vial×17

Step 2 · Skill 17 → 37

Orange→Yellow

Chaos Circuit

trainerfirst craft: +Knowledge

About 21 crafts.658

per skill point32

Null Stone×21

Aqirite×105

Ironclaw Ore×63

Step 3 · Skill 37 → 70

Orange→Green

Adjustable Cogwheel

specializationfirst craft: +Knowledge

About 50 crafts.4,305

per skill point130

Stunning Sapphire×50

Handful of Bismuth Bolts×50

Gyrating Gear×50

Entropy Enhancer×50

Step 4 · Skill 70 → 120

Orange→Green

P.0.W. x2

specializationfirst craft: +Knowledge

About 34 crafts.60,166

per skill point1,203

Handful of Bismuth Bolts×2176

Skill 120 — done. Now sell what you made.

Crafted itemUnitsEachTotal

Adjustable Cogwheel507

Bottled Brilliance171

1720

Capped at what the market takes in 3 days, so a route never pretends to sell hundreds at once.

Back in your pocket64,806

What's worth crafting with Engineering right now

Questions

How this route is built

What does it cost to level Engineering right now?: 65.3kg in reagents at today's EU auction prices, over about 122 crafts. Sell the results and it comes back to 64.8kg.
Where do these numbers come from?: The skill thresholds are read from the game client data for build 12.1.0.68914. The prices are the region-wide auction house, refreshed every few minutes; these are the snapshot taken at 02:31 UTC.
Why does the route change when I reload?: Because the prices did. The cheapest recipe for a stretch of skill is whichever one's reagents are cheapest at that moment, and that moves through the day.

A first craft pays Knowledge, not skill, so it is shown as a badge and left out of the craft count. Vendor reagents are priced at the lower of the vendor and the auction house.