How is total crafting cost calculated?

For each material it multiplies the quantity needed by the price per unit, then sums those line totals. Dividing the sum by the number of finished items the craft produces gives the cost to make a single item.

How is profit worked out?

Profit per item is the sell price minus the cost per item. Multiplying by the output quantity gives profit per craft. A negative figure means the recipe loses money at the prices you entered, which is common for XP-focused recipes.

Should I include the Grand Exchange tax?

If your game version charges a sale tax on the finished item, reduce the sell price you enter by that percentage first. Then the profit figure already accounts for the tax, since it is computed from the net amount you actually receive.

Why does cost per item differ from total cost?

Some recipes produce several items per craft, such as a batch of potions or a stack of bars. Total cost is for the whole batch, while cost per item divides that by the output count so you can compare against a single item's sale price.

Can I include intermediate components?

Yes. Add each intermediate as its own material line using the price of buying or making it. The calculator does not care whether a material is raw or pre-crafted, only its quantity and per-unit price.

RuneScape 3 Crafting Material Cost Calculator

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Crafting in RuneScape 3 only profits when the finished item sells for more than its materials cost, and that margin is easy to misjudge across multi-ingredient recipes. This calculator sums every material line, finds your true cost per finished item, and tells you whether the craft makes or loses money.

How it works

Each material contributes its quantity times its unit price, the lines are summed, and the total is divided across the finished items:

lineCost   = quantity × pricePerUnit
totalCost  = Σ lineCost over all materials
costPerItem= totalCost / outputCount
profitItem = sellPrice − costPerItem
profitCraft= profitItem × outputCount

A positive profitItem means money-making, a negative one means you are paying gp for experience — both are valid strategies depending on your goal.

Example and tips

If a recipe needs 3 units at 200 gp and 1 unit at 1,500 gp, total material cost is 2,100 gp. If it yields 1 item that sells for 2,400 gp, profit is 300 gp per craft. When prices move fast, re-check the Grand Exchange before committing to a large batch — a recipe that profits at one snapshot can flip to a loss when an ingredient spikes.