What does it cost to level Leatherworking right now?

4.2kg in reagents at today's US auction prices, over about 100 crafts. Sell the results and it comes back to 3.3kg.

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 14:57 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 · Midnight Leatherworking · US · prices as of 14:57 UTC

Leatherworking leveling 1 → 110

4.2kg in reagents over about 100 crafts. Sell what you make and it comes back to 3.3kg.

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

Void-Tempered Hide×5417

Silverleaf Thread×5409

×54048

Total4,178

Step 1 · Skill 1 → 52

Orange→Yellow

Apprentice Smith's Apron

trainerfirst craft: +Knowledge

About 54 crafts.975

per skill point19

Silverleaf Thread×540

Void-Tempered Hide×54

Step 2 · Skill 52 → 110

Orange→Green

Sin'dorei Engineer's Gloves

needs the recipe itemfirst craft: +Knowledge

About 46 crafts.3,203

per skill point55

Mote of Light×920

Scalewoven Hide×92

Aetherlume×138

Skill 110 — done. Now sell what you made.

Crafted itemUnitsEachTotal

Sin'dorei Engineer's Gloves4616

763

46763

Apprentice Smith's Apron541

5486

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

Back in your pocket3,328

What's worth crafting with Leatherworking right now

Questions

How this route is built

What does it cost to level Leatherworking right now?: 4.2kg in reagents at today's US auction prices, over about 100 crafts. Sell the results and it comes back to 3.3kg.
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 14:57 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.