What does it cost to level Leatherworking right now?

24.4kg in reagents at today's KR auction prices, over about 78 crafts. Sell the results and it comes back to 24.4kg.

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 17:26 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 · Cataclysm Leatherworking · KR · prices as of 17:26 UTC

Leatherworking leveling 1 → 75 · Cataclysm Leatherworking

24.4kg in reagents over about 78 crafts. Sell what you make and it comes back to 24.4kg.

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

Blackened Dragonscale×65019

Total24,437

Step 1 · Skill 1 → 30

Orange→Yellow

Hardened Scale Cloak

needs the recipe item

About 31 crafts.2,914

per skill point100

Savage Leather×62

Deepsea Scale×248

Step 2 · Skill 30 → 37

Orange→Yellow

Heavy Savage Leather

needs the recipe item

About 8 crafts.1,120

per skill point160

Savage Leather×40

Step 3 · Skill 37 → 62

Orange→Yellow

Tsunami Chestguard

needs the recipe item

About 26 crafts.7,410

per skill point296

Deepsea Scale×1560

Step 4 · Skill 62 → 75

Orange

Twilight Dragonscale Cloak

needs the recipe item

About 13 crafts.12,993

per skill point999

Blackened Dragonscale×650

Skill 75 — done. Now sell what you made.

Crafted itemUnitsEachTotal

Hardened Scale Cloak3115

314

Tsunami Chestguard2615

263

Heavy Savage Leather84

839

Twilight Dragonscale Cloak1346

135

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

Back in your pocket24,428

What's worth crafting with Leatherworking right now

Questions

How this route is built

What does it cost to level Leatherworking right now?: 24.4kg in reagents at today's KR auction prices, over about 78 crafts. Sell the results and it comes back to 24.4kg.
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 17:26 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.