Free Ceramic Calculators — 50+ Tools for Potters & Engineers
Scientifically accurate ceramic tools covering every stage of the making process — from calculating clay shrinkage and sizing wet pieces, to glaze batch scaling, kiln firing schedules, and studio business math. All calculators are free, run in the browser, and require no account.
Production & Business
Ceramic Pricing Calculator
Calculate wholesale and retail prices for ceramic pieces based on materials, labor, and overhead.
Studio Break-Even Calculator
Calculate how many pieces you need to sell each month to cover all studio costs.
Gallery Commission Calculator
Calculate your artist take-home after gallery commission and platform fees.
Pottery Class Pricing Calculator
Calculate a profitable tuition price for pottery classes based on costs and student count.
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.
Craft Fair Profitability Calculator
Calculate your break-even sales target, expected profit, and effective hourly rate for a pottery craft fair including booth, travel, materials, and labor costs.
Ceramic Production Planner
Plan a production order from first throw to delivery. Enter your studio capacity and get a phase-by-phase timeline with a realistic ready date.
Pottery Income Goal Calculator
Calculate how many ceramic pieces you need to sell and make each month to reach your income goal, accounting for material costs, platform fees, scrap rate, and studio overhead.
Clay & Shrinkage
Clay Shrinkage Calculator
Calculate drying, firing, and total shrinkage rates from wet, dry, and fired measurements.
Target Finished Size Calculator
Calculate the wet throwing size needed to achieve a specific finished fired dimension.
Clay Weight Estimator
Estimate the correct amount of wet clay needed for a pot based on dimensions and form type.
Drying Time Predictor
Estimate how long a ceramic piece will take to dry based on wall thickness, humidity, and airflow.
Crack Risk Calculator
Assess the cracking risk of a ceramic piece during drying based on form, clay type, and conditions.
Multi-Axis Shrinkage Calculator
Measure shrinkage in X, Y, and Z axes to detect anisotropic behavior and warping risk.
Clay Water Requirement Calculator
Calculate how much water to add to dry clay powder to reach a workable consistency.
Slab Size & Weight Calculator
Calculate the wet cutting dimensions and clay weight for a slab with a target fired size.
Clay Body Blend Calculator
Blend two clay bodies by percentage and predict the shrinkage and absorption of the resulting mix.
Grog Addition Calculator
Calculate how much grog to add to reduce clay body shrinkage to a target percentage.
Clay Moisture Content Calculator
Measure clay moisture percentage from wet and dry weights, or calculate how much water to add or remove to reach a target working consistency.
Wheel Throwing Weight Calculator
Calculate how much wet clay you need to throw a cylinder, mug, bowl, plate, or vase based on target dimensions and wall thickness.
Clay Inventory Calculator
Calculate how many ceramic pieces you can make from your current clay stock, accounting for trimming waste, cracking losses, and kiln scrap.
Firing Tools
Kiln Firing Cost Calculator
Estimate the electricity cost of a kiln firing based on wattage, duration, and local electricity rates.
Kiln Volume Calculator
Calculate the internal volume of a round or rectangular kiln to estimate load capacity.
Kiln Ramp Rate Calculator
Calculate total firing time and check ramp rates against critical temperature danger zones.
Pottery Cone Chart & Temperature Calculator
Convert Orton cone numbers to equivalent temperatures in Celsius and Fahrenheit. Free pottery cone chart with firing speed correction.
Firing Schedule Generator
Generate a complete multi-segment kiln firing schedule for bisque or glaze firing.
Kiln Element Calculator
Calculate kiln element resistance, current draw, and estimated element lifespan.
Kiln Cooling Rate Calculator
Calculate safe kiln cooling rates for each temperature zone, with critical guidance for the quartz inversion at 573°C to prevent dunting and thermal shock.
Kiln Loading Calculator
Calculate how many pieces fit on each shelf and in the total kiln based on kiln interior dimensions, shelf height, and piece size.
Glaze Engineering
Glaze Batch Calculator
Scale any glaze recipe to a specific batch weight by entering ingredient percentages.
Glaze Thermal Expansion (COE) Calculator
Calculate the coefficient of thermal expansion (COE) of a glaze from its oxide composition.
Glaze Specific Gravity Calculator
Measure glaze specific gravity and calculate how much water to add or remove to reach a target SG.
Deflocculant Dosage Calculator
Calculate starting amounts of sodium silicate or Darvan for deflocculating casting slip.
Glaze Colorant Calculator
Calculate oxide and stain additions to produce a target color in a glaze batch.
Silica:Alumina Ratio Calculator
Calculate the SiO₂:Al₂O₃ ratio from a glaze UMF to predict glossy, satin, or matte surface quality.
Glaze Recipe Scaler
Scale any ceramic recipe — clay body, glaze, slip, or engobe — to any target batch weight.
Loss on Ignition (LOI) Calculator
Calculate the fired weight of a glaze or clay batch after materials lose mass during firing, and scale batch weights to hit a target fired quantity.
Glaze Opacifier Calculator
Calculate how much zircopax, tin oxide, or titanium dioxide to add to a base glaze to achieve slight, moderate, or full opacity.
Glaze Recipe to Percentage Converter
Convert a glaze recipe written in grams or parts by weight into percentages normalised to 100. Enter up to 12 ingredients and get a percentage breakdown instantly.
Slip Casting
Slip Specific Gravity Calculator
Calculate slip specific gravity from weight measurements to determine slip consistency for casting.
Plaster Mixing Calculator
Calculate exact plaster and water weights needed to fill a mold volume using the WCR method.
Slip Casting Cycle Calculator
Estimate casting time, drain time, demold window, and mold drying time for plaster slip casting.
Brongniart's Formula Calculator
Calculate dry material content and water content in a slip using Brongniart's formula.
Plaster Mold Volume Calculator
Calculate how much pottery plaster and water to mix for a block, cylinder, or oval casting mold based on cavity dimensions and wall thickness.
Testing & Analysis
Water Absorption Calculator
Measure fired ceramic water absorption (porosity) using the standard dry/wet weight test.
Glaze Fit Calculator (COE Mismatch)
Predict crazing or shivering risk by comparing the Coefficient of Thermal Expansion (COE) of your clay body and glaze.
Utility
Pottery Mug & Vessel Volume Calculator
Calculate how many ounces or millilitres a pottery mug, cup, or bowl holds from its inner dimensions. Supports straight mugs, tapered vessels, and rounded bowls.
Ceramic Unit Converter
Convert lengths, weights, temperatures, and volumes between metric and imperial units.
Tile Coverage Calculator
Calculate how many tiles and how much clay you need to cover a wall or floor area.
Mesh Size Converter
Convert between US mesh number, microns, millimeters, and inches for ceramic sieves, grog sizes, and material particle sizing.