What does it cost to level Engineering right now?

2.5kg in reagents at today's TW auction prices, over about 265 crafts. Sell the results and it comes back to 2.4kg.

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 17:54 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 · Draenor Engineering · TW · prices as of 17:54 UTC

Engineering leveling 1 → 100 · Draenor Engineering

2.5kg in reagents over about 265 crafts. Sell what you make and it comes back to 2.4kg.

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

Nagrand Arrowbloom×401

×4044

High-Explosive Gunpowder×1147

×115

Total2,536

Step 1 · Skill 1 → 5

Yellow→Green

Alliance Firework

needs the recipe item

About 11 crafts.5

per skill point1

High-Explosive Gunpowder×11

Step 2 · Skill 5 → 25

Orange

Stealthman 54

needs the recipe item

About 20 crafts.203

per skill point10

Blackrock Ore×40

True Iron Ore×40

Nagrand Arrowbloom×40

Step 3 · Skill 25 → 100

Yellow→Green

Secret of Draenor Engineering

needs the recipe item

About 234 crafts.2,328

per skill point31

True Iron Ore×1170

Skill 100 — done. Now sell what you made.

Crafted itemUnitsEachTotal

Secret of Draenor Engineering23450

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

Back in your pocket2,414

What's worth crafting with Engineering right now

Questions

How this route is built

What does it cost to level Engineering right now?: 2.5kg in reagents at today's TW auction prices, over about 265 crafts. Sell the results and it comes back to 2.4kg.
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 17:54 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.