What does it cost to level Engineering right now?

77.9kg in reagents at today's US auction prices, over about 131 crafts. Sell the results and it comes back to 77.4kg.

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 17:57 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 · US · prices as of 17:57 UTC

Engineering leveling 1 → 120 · Khaz Algar Engineering

77.9kg in reagents over about 131 crafts. Sell what you make and it comes back to 77.4kg.

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×222617

Whimsical Wiring×61225

15,422

×61215,422

Entropy Enhancer×5049

Crystalline Powder×2922

×296

Total77,874

Step 1 · Skill 1 → 20

Orange→Green

Bottled Brilliance

researchfirst craft: +Knowledge

About 29 crafts.252

per skill point13

Leyline Residue×58

Crystalline Powder×29

Gilded Vial×29

Step 2 · Skill 20 → 37

Orange→Yellow

Entropy Enhancer

trainerfirst craft: +Knowledge

About 18 crafts.784

per skill point46

Step 3 · Skill 37 → 70

Orange→Green

Serrated Cogwheel

specializationfirst craft: +Knowledge

About 50 crafts.5,397

per skill point163

Radiant Ruby×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.71,440

per skill point1,428

Handful of Bismuth Bolts×2176

Skill 120 — done. Now sell what you made.

Crafted itemUnitsEachTotal

Serrated Cogwheel507

397

50397

Bottled Brilliance291

2934

Entropy Enhancer181

1834

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

Back in your pocket77,407

What's worth crafting with Engineering right now

Questions

How this route is built

What does it cost to level Engineering right now?: 77.9kg in reagents at today's US auction prices, over about 131 crafts. Sell the results and it comes back to 77.4kg.
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 17:57 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.