Pottery Calculators
Free pottery calculators for clay weight estimation, glaze chemistry calculations, kiln firing schedules, shrinkage rate planning, and construction design for potters and ceramic artists.
Pottery Subcategory
Clay & Materials Calculators
Calculate clay weight for thrown and hand-built forms, estimate shrinkage from wet clay to fired ware, measure glaze specific gravity, plan clay reclaim processes, and determine plaster-to-water ratios for mold making.
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Pottery Clay Weight Calculator
Calculate how much clay you need for pottery projects based on form type, dimensions, and clay body with shrinkage compensation.
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Pottery Shrinkage Calculator
Calculate pottery clay shrinkage from wet to fired dimensions and find the wet size needed to achieve your desired fired measurements.
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Pottery Specific Gravity Calculator
Measure and adjust the specific gravity of pottery glazes for consistent dipping, brushing, or spraying application thickness.
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Pottery Clay Reclaim Calculator
Calculate how to reclaim and recycle pottery clay scraps including water adjustments, drying time estimates, and cost savings versus buying new clay.
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Pottery Plaster Mold Calculator
Calculate the correct plaster-to-water ratio and quantities for pottery molds including press molds, slip casting molds, and hump molds.
Pottery Subcategory
Glaze Chemistry Calculators
Scale glaze recipes by weight, analyze glaze chemistry using the unity molecular formula, calculate colorant oxide percentages, evaluate thermal expansion for glaze fit, and determine proper glaze application thickness.
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Pottery Glaze Batch Calculator
Scale a glaze recipe to any batch size by weight, calculate bentonite and water additions, and estimate material cost.
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Pottery Glaze Chemistry Calculator
Calculate the unity molecular formula (UMF) of a glaze recipe and compare oxide balance against target ranges by firing cone.
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Pottery Glaze Colorant Calculator
Calculate how much colorant oxide to add to a base glaze for your desired color and intensity, with safety and interaction notes.
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Pottery Thermal Expansion Calculator
Calculate glaze coefficient of thermal expansion from recipe chemistry and assess crazing or shivering risk against your clay body.
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Pottery Glaze Thickness Calculator
Estimate wet and fired glaze application thickness, glaze volume used per piece, and coverage based on dipping, brushing, spraying, or pouring.
Pottery Subcategory
Kiln & Firing Calculators
Convert between cone numbers and temperatures, build kiln firing schedules with ramp and hold segments, plan kiln loading capacity, calculate kiln element sizing and replacement, and estimate electricity costs per firing.
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Pottery Cone Temperature Calculator
Convert between Orton pyrometric cone numbers and kiln firing temperature in Fahrenheit or Celsius, adjusted for slow, standard, or fast firing rates.
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Pottery Kiln Firing Schedule Calculator
Build a complete ramp/hold kiln firing schedule with total firing time, critical temperature warnings, and slow-cool guidance for bisque, glaze, single-fire, raku, and lustre firings.
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Pottery Kiln Loading Calculator
Estimate how many pieces fit in your kiln, usable shelf levels, shelf weight capacity, and recommended shelf arrangement based on kiln size, piece size, and firing type.
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Pottery Kiln Element Calculator
Size replacement kiln elements: resistance, current draw, Kanthal wire length, coil dimensions, breaker sizing, remaining element life, and replacement cost.
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Pottery Kiln Cost Calculator
Estimate electric pottery kiln firing costs, including per-firing, monthly, annual, and cost-per-piece, plus peak demand and CO2 estimates.
Pottery Subcategory
Construction & Forming Calculators
Determine throwing weights for wheel-thrown forms, calculate slab dimensions with shrinkage compensation, plan coil building dimensions for vessels, find optimal wall thickness by form type, and estimate slip casting volumes.
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Pottery Throwing Weight Calculator
Calculate exactly how much clay to weigh out before throwing a mug, bowl, plate, vase, or other wheel-thrown form, including wet dimensions, wheel speed, and waste allowance.
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Pottery Slab Construction Calculator
Calculate cutting dimensions with shrinkage and seam allowance, total clay weight, and warping risk for slab-built boxes, plates, tiles, and platters.
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Pottery Coil Building Calculator
Estimate coil count, total clay weight, wall thickness, and build time for coil-built pottery vessels including cylinders, bowls, tapered vases, and bottles.
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Pottery Wall Thickness Calculator
Find the recommended wall thickness range for mugs, bowls, plates, vases, planters, sculpture, tiles, and teapots based on clay body, forming method, and intended use.
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Pottery Slip Casting Calculator
Calculate slip volume per cast, wall thickness build-up over time, deflocculant amounts, and mold reuse timing for plaster mold slip casting.
Pottery Subcategory
Production & Finishing Calculators
Estimate glaze coverage for bisqueware batches, formulate clay body recipes from raw materials, calculate project costs per piece, optimize kiln shelf arrangements, and find recommended wheel speeds for different operations.
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Pottery Glaze Coverage Calculator
Estimate surface area, glaze volume, dry material weight, and cost for a batch of mugs, bowls, plates, vases, or teapots based on application method and coat count.
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Pottery Clay Body Recipe Calculator
Calculate ingredient weights from percentages, and predict shrinkage, absorption, and plasticity for a custom clay body recipe built from raw materials.
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Pottery Project Cost Calculator
Estimate clay, glaze, firing, and overhead cost per piece, plus a suggested retail price, for mugs, bowls, plates, vases, and custom pottery projects.
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Pottery Kiln Shelf Calculator
Calculate shelf levels, optimal post heights, usable area, and kiln furniture needs based on your kiln dimensions and piece heights.
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Pottery Wheel Speed Calculator
Find the recommended pottery wheel RPM for centering, opening, pulling walls, shaping, trimming, and decorating based on piece diameter and skill level.
About These Pottery Calculators
Pottery calculations bring precision to an art form that has been practiced for thousands of years. Whether you're estimating how much clay to wedge for a set of mugs, calculating shrinkage to ensure a lid fits after firing, or scaling a glaze recipe for a larger batch, the underlying math saves time, reduces waste, and prevents costly kiln disasters.
This collection covers the core calculations that every potter encounters: clay weight estimation for throwing and hand-building, shrinkage compensation across wet-to-fired stages, glaze chemistry and batch scaling, kiln firing schedules and cost estimation, and construction dimensions for slabs, coils, and wheel-thrown forms.
All calculations run entirely in your browser — no data is sent to a server, no account is required, and results appear instantly. The formulas follow standard ceramic engineering references, Orton cone specifications, and established studio pottery practices refined over generations of craft tradition.