Production

Ceramic Unit Cost Calculator

Calculate the true per-piece cost of a ceramic item from raw material prices — clay, glaze, and kiln electricity — then get a suggested selling price.

Updated

Clay

$

Price per bag / block of clay

kg
g

Freshly formed (wet/green) piece weight

%

Trimming scraps + moisture evaporation (typically 15–20%)

Glaze

$

Dry glaze powder or liquid glaze per kg/L

g

Average glaze consumed per piece (mugs: ~15–25 g)

Kiln

$

Total electricity cost for one full firing session

pieces

Extras & Pricing

$

Luster, gold, overglaze, decals, etc.

$

Finishing, tissue wrap, box costs per piece

%

Gross margin (50% → price = cost × 2). Set 0 to skip.

error

Results

calculate

Enter your measurements above and click Calculate.

How Unit Cost is Calculated

This calculator works from the bottom up — starting with actual purchase prices for raw materials and allocating shared costs (kiln electricity) to individual pieces. It's designed for potters who want to know their true per-piece cost before setting a price.

Clay Cost per Piece

Clay cost/g = Package Price ÷ (Package Weight kg × 1000)
Effective clay = Wet Weight × (1 + Waste %) Clay Cost = Clay cost/g × Effective clay

The waste percentage accounts for water evaporation during drying (10–15%) and trimming scraps. A fresh 250 g thrown mug with 15% waste means you actually consumed ~288 g of clay from your bag.

Kiln Cost per Piece

Kiln Cost/piece = (Firing Cost ÷ Pieces per Firing) × Firing Cycles

For standard ware that goes through a bisque + glaze firing, select "2 firings." Single-fire or raku workflows select "1 firing."

Suggested Selling Price

Selling Price = Total Cost ÷ (1 − Margin %)

This is a gross margin formula (not markup). At 50% margin, the selling price is exactly 2× cost — half the revenue is profit. At 33% margin, the price is 1.5× cost. Use the Ceramic Pricing Calculator for a more detailed wholesale/retail breakdown that includes labor hours and overhead.

What This Calculator Does Not Include

  • Labor time (throwing, trimming, loading kilns)
  • Studio overhead (rent, insurance, tools)
  • Shipping or marketplace fees

For a complete landed cost with labor and overhead, use the Ceramic Pricing Calculator.

Frequently Asked Questions

What is the difference between this and the Ceramic Pricing Calculator? expand_more
The Unit Cost Calculator works bottom-up from raw material purchase prices (e.g., $25 per 10 kg bag of clay, $15 per kg of glaze) and gives you the true material + kiln cost per piece. The Ceramic Pricing Calculator works top-down from already-aggregated costs and calculates wholesale and retail prices with labor and overhead included. Use this calculator first to find your baseline cost, then feed it into the pricing calculator.
What clay waste percentage should I use? expand_more
Typical values: 10% for slip casting (minimal trimming), 15–18% for wheel-throwing, 20–25% for heavily trimmed or altered forms. The waste includes water that evaporates during drying (clay shrinks 8–15% by weight) and physical clay lost to trimming and floor sweepings.
How do I measure glaze per piece? expand_more
Weigh a bisqueware piece before and after glazing on a gram scale. The difference is your glaze consumption. Average values: small mug dipped inside and out ~15–20 g, medium bowl ~25–40 g, large platter ~50–80 g. Spraying uses less glaze per piece than dipping; brushing uses more.
Why multiply kiln cost by 2? expand_more
Standard studio pottery requires two firings: a bisque firing (around cone 06) to harden greenware and remove organic matter, then a glaze firing (cone 6–10) to melt the glaze. Each firing consumes a full kiln load of electricity. If you single-fire (applying raw glaze to greenware) or raku, select "1 firing" to avoid doubling the cost.