Free Tools & Calculators
Free, fast tools from PotteryHow. Every tool runs right in your browser: free, no sign-up, nothing to install, and nothing you type is sent anywhere. Tap “Use it here” to try one on this page, or open its full page for the guide.
Ceramic Glaze Colorant Chart
Look up the color family cobalt, copper, iron, chrome, manganese, rutile, nickel or stains give by amount, cone, atmosphere and base glaze.
Cone Temperature Converter and Glaze-Clay Cone Matcher
Convert any Orton cone (022–12) to °F and °C at your heating rate, then check whether your clay and glaze cones match.
Glaze Calculation Software Finder
Filter six verified glaze chemistry apps by cost, platform, offline use and must-have feature to find ceramic glaze calculation software that fits.
Glaze Recipe Batch Calculator
Convert a percentage glaze recipe (base + additions) into gram, kg, ounce or pound weights for any batch size, with normalizing and a weighing sheet.
Glaze Specific Gravity Calculator (How Much Water to Add)
Find your glaze's specific gravity from a weighed sample and estimate how much water to add or remove to reach your target SG.
Home Pottery Studio Startup Cost Calculator
Estimate what a home pottery studio costs to set up, including wheel, kiln, kiln furniture, tools, mats and clay, at budget, mid or pro shelf prices.
How Much Glaze Do I Need? Glaze Coverage Estimator
Estimate pints of brush-on glaze from your jar's stated coverage, or the bucket depth, slurry volume and dry glaze needed for dipping.
Kiln Firing Cost Calculator
Estimate the electricity cost of a kiln firing and per piece from watts (or volts × amps), firing hours, duty cycle and price per kWh.
Kiln Firing Schedule Time Calculator
Enter your own ramp segments (target, rate, hold) to get kiln firing time, a segment breakdown, finish date/time and a copyable summary.
Plaster Mold Mix Calculator
Estimate plaster and water weights for a box or cylinder mold, minus an optional model volume, plus an optional waste allowance.
Pottery Bat Size Finder
Enter your wheel head diameter in inches or cm to see nominal bat size matches and each listing. Square bats are checked by their diagonal.
Pottery Clay Cost-Per-Piece Calculator
Work out the clay cost of each pot and pieces per bag from bag price, bag weight, pre-trimming clay per piece and any extra production loss.
Pottery Clay Shrinkage Calculator
Find how big to make a pot wet to hit a fired size, predict fired size, or measure your clay's shrinkage % from a test bar.
Pottery Clay Throwing Weight Chart
Look up how much clay to wedge for 27 thrown forms (mugs, bowls, plates, pitchers, teapots, jars) with thrown height and width, in lb/oz or grams.
Pottery Gift Kit Finder
Pick who the gift is for, what they want to make and your budget to see which pottery kit type fits, with a typical 2026-11-09 price band.
Pottery Tool Selector Quiz
Answer two quick questions about how you make pottery and which stage you're at to get your must-have beginner tool list, with the reason for each tool.
Pottery Wheel Cost Estimator
Estimate low, typical and high budget scenarios for a pottery wheel setup (wheel, splash pan, bat packs) from dated US price bands.
Pottery Wheel Size Calculator
Enter how much clay you throw at once and see which wheels state that capacity, their head-size range and the closest matches from our shelf.
What Size Kiln Do I Need? Kiln Size Calculator
Enter your tallest and widest pieces, load size and power to estimate kiln interior size, cubic feet and candidate Skutt and L&L models.