Refining calculator

The calculator checks if refining one material makes or loses silver. You enter the prices, so you can use buy orders, sell orders or what you paid.

1. Choose the resource type: ore, fiber, hide, wood or stone.
2. Choose the tier, and the enchantment for tier 4 and up.
3. Enter the price of the raw resource, the refined material one tier down, and the refined material you make.
4. Choose focus, and whether you refine in the bonus city.
5. If you refine at a player station, enter its fee per 100 nutrition. Then read the cost and the profit.

Refining uses the same return rate as crafting. Every royal city gives a Local Production Bonus (LPB) of 18. Focus adds 59. The refining bonus city for that resource adds 40. Add them up, then convert:

return rate = 1 − 1 ÷ (1 + LPB ÷ 100)

One refined material needs raw resources of the same tier, plus one refined material of the tier below (from tier 3 up):

The calculator then works out:

material cost = (raw price × raw count + lower-tier price) × (1 − return rate)

station fee = 2 ^ (tier + enchantment) × 0.1125 × (fee per 100 nutrition ÷ 100)

profit = refined price − (material cost + station fee)

2 ^ (tier + enchantment) is the item value of the refined material in the game files, for example 16 at tier 4 and 32 at tier 4.1. The station fee can be 0 to 1,000 silver per 100 nutrition.

One tier 4 metal bar needs 2 tier 4 ore and 1 tier 3 metal bar. Refine it in Thetford, the ore bonus city, with focus. The LPB is 18 + 40 + 59 = 117, so the return rate is 53.9%.

At a station fee of 500 silver per 100 nutrition, the item value is 16 and the fee is 9.0 silver per bar. Enter your prices in the calculator to see the profit.