Glaze Calculator
Dry Batch Calculator
Add ingredients and total dry weight.
| Ingredient | % | Weight (g) | Cost | Notes |
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Batch Scaling Calculator
| Ingredient | Original % | Original g | Scaled g |
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Percentage → Weight
| Ingredient | % | Weight (g) |
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Water Estimator
Estimated water: 0 ml
Specific Gravity Assistant
Specific Gravity: 0.00 (target: 1.30–1.50 for dipping)
Ingredient Cost Calculator
| Material | Weight | Cost |
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Total cost: $0.00 | per kg: $0.00 | per g: $0.00
Unit Converter
Result: 0
Batch Composition
Free Glaze Calculator for Pottery and Ceramics
The Glaze Calculator is a free online tool for working with pottery glaze recipes. Use it to calculate ingredient weights, scale a recipe, convert measurement units, estimate mixing water, calculate specific gravity, and review material costs.
Whether you are preparing a small test batch or a larger mixture, the calculator helps you organize your recipe and keep track of ingredient amounts.
What Can You Do With the Glaze Calculator?
The tool includes seven features to help with common glaze calculations:
- Dry Batch Calculator: Add glaze ingredients, enter percentages and weights, and keep notes about your recipe.
- Batch Scaling Calculator: Adjust ingredient weights when changing the size of a recipe.
- Percentage-to-Weight Calculator: Convert recipe percentages into gram amounts for a chosen batch weight.
- Water Estimator: Get a starting estimate of how much water to add to a dry glaze mixture.
- Specific Gravity Calculator: Calculate a specific gravity value from a measured weight and volume.
- Ingredient Cost Calculator: Record material weights and prices to review estimated costs.
- Unit Converter: Convert between grams, kilograms, ounces, and pounds.
The tool also displays charts of your batch composition and lets you save your recipe in your browser, download a chart, or share your recipe using your device's available sharing options.
How to Use the Glaze Calculator
Start by opening the tab for the calculation you need. For recipe calculations, the Dry Batch and Batch Scaling tabs are useful places to begin.
1. Add Your Glaze Ingredients
Open the Dry Batch Calculator and select an ingredient from the list. Enter its percentage and weight in grams, then click Add. Repeat this process for the other ingredients in your recipe.
You can also enter a custom ingredient name and edit the information in the table. The calculator displays the total percentage and combined weight of the ingredients you add.
2. Calculate Ingredient Weights
Glaze recipes often use percentages to show the proportion of each ingredient. These percentages can be converted into weights for a chosen batch size.
For example, suppose your recipe contains 30% silica and you want to prepare a 1,000-gram batch.
The calculation is:
30 ÷ 100 × 1,000 = 300 grams
You would need 300 grams of silica for that batch. Use the Percentage-to-Weight tab to calculate the amounts for the other ingredients in your recipe.
3. Scale a Glaze Recipe
Batch scaling helps you increase or decrease a recipe while keeping the same ingredient proportions.
For example, suppose your original recipe weighs 1,000 grams, but you want to prepare 5,000 grams. Enter these values in the Batch Scaling tab and click Scale Recipe.
The new batch is five times the original size, so each ingredient weight is multiplied by five.
Make sure the original batch weight matches the total weight of the recipe you entered. The calculator uses this value to determine the scaling factor.
4. Estimate the Water Amount
Open the Water Estimator and enter the total dry ingredient weight. Select Thin, Normal, or Thick consistency, then enter any adjustment in milliliters before clicking Estimate.
The result is a starting estimate based on the calculator's built-in ratios. It is not an exact water requirement for every glaze recipe. Different materials and preparation methods can affect the amount of water needed, so check the mixture and adjust it as appropriate.
5. Calculate Specific Gravity
Specific gravity is a measurement used to describe the density of a liquid compared with water. It can help potters compare the consistency of glaze mixtures.
To use this feature, enter the measured weight in grams and the corresponding volume in milliliters. Click Calculate SG to see the result.
For example, if 100 ml of a liquid glaze weighs 140 grams, its approximate specific gravity is 1.40, assuming the measurement represents the liquid alone and the volume is measured accurately.
The appropriate value for a glaze depends on its ingredients and application method. Do not treat a single specific gravity value as suitable for every glaze.
6. Estimate Ingredient Costs
Use the Ingredient Cost Calculator to enter a material name, weight, and price. The tool displays the recorded amounts and calculates cost figures for the entries.
For more useful cost estimates, make sure the prices and weights you enter are consistent with how you buy and use your materials. The displayed figures are estimates, not a complete calculation of your total pottery production costs.
7. Convert Units and Save Your Recipe
The Unit Converter changes a measurement between grams, kilograms, ounces, and pounds.
When you have finished entering your recipe, you can view the batch composition charts, download the pie chart as a PNG image, or click Save to store the current recipe in your browser. The saved recipe can load again when you return using the same browser and website storage.
The Share option uses your device's sharing feature when supported.
Tips for Working With Glaze Recipes
A few simple habits can make glaze calculations easier to review and repeat:
- Check your percentages. If your recipe is intended to total 100%, confirm that the ingredient percentages add up to 100%.
- Use consistent units. Enter ingredient weights in the units requested by the calculator, and convert measurements when needed.
- Check the batch size. When scaling a recipe, confirm that the original weight matches the recipe you entered.
- Keep clear records. Save the ingredient names, percentages, weights, and any useful notes about each batch.
- Test before making larger amounts. A calculation can help you measure ingredients, but it cannot predict the final glaze color, texture, surface, or firing result.
- Handle glaze materials carefully. Follow the safety instructions for each material, avoid breathing dust, and use appropriate protective equipment and cleanup methods.
Glaze results depend on more than ingredient amounts. The materials, clay body, application, and firing conditions can all affect the finished surface. Use suitable testing and follow the instructions provided for your glaze materials.
For more information, read Ceramic Glazing Techniques from Ceramic Arts Network. This resource covers different approaches to applying and working with ceramic glazes.
Related Tools
Clay Calculator
Working with clay as well as glaze? The Clay Calculator can help you estimate clay amounts for pottery projects.
Clay Shrinkage Calculator
Clay can change size as it dries and is fired. Use the Clay Shrinkage Calculator to estimate the dimensions of a clay piece after shrinkage.
Frequently Asked Questions
What is a Glaze Calculator used for?
A Glaze Calculator helps you organize glaze recipes, convert ingredient percentages into weights, scale batch sizes, estimate water amounts, calculate specific gravity, and review ingredient costs.
Can I scale a glaze recipe to any batch size?
You can use the Batch Scaling feature to calculate ingredient amounts for a different batch size. Enter the correct original and desired batch weights, and check that the recipe proportions are correct before mixing.
Why are glaze recipes written in percentages?
Percentages describe the proportion of each ingredient in a recipe. They make it easier to calculate ingredient weights for different batch sizes without changing the original proportions.
Does the Water Estimator give an exact amount?
No. It provides an estimate based on the selected consistency and dry weight. The amount of water needed can vary with the materials and preparation method.
What does specific gravity mean in pottery glazing?
Specific gravity compares a liquid's density with the density of water. It can be used to compare glaze mixtures, but the appropriate value depends on the particular glaze and how it is applied.
Can I save a glaze recipe?
Yes. Click Save to store the current recipe in your browser. The saved recipe can load automatically when you return to the calculator using the same browser, provided the browser's stored site data has not been cleared.
Will the calculator tell me how my glaze will look after firing?
No. It calculates recipe amounts and related measurements, but it cannot predict the exact fired result. Test the glaze under suitable conditions before relying on it for a finished project.
How to Use the Glaze Calculator
Start by selecting the tool that matches your task. For a new recipe, use the Dry Batch Calculator and add each ingredient with its percentage or weight. You can include materials such as whiting, bentonite, dolomite, silica, feldspar, or other ingredients used in your recipe.
For batch scaling, enter the original batch weight and the amount you want to make. The calculator will recalculate the ingredient weights while keeping the original proportions.
When preparing a glaze, use a digital scale rather than estimating dry ingredients by volume. Weigh materials carefully and record the recipe, batch size, date, clay body, firing temperature, and other useful notes.
For water, add it gradually and adjust the mixture according to the consistency required for your application. If you use specific gravity, measure the prepared glaze and record the result so you can compare future batches.
Before making a large quantity of a new recipe, consider testing a smaller batch first. A test can help you evaluate the glaze on your chosen clay body and under your firing conditions before using more materials.
Keep Your Clay and Glaze Planning Together
Glaze is only one part of a pottery project. If you also need to estimate how much clay is required for mugs, bowls, plates, sculptures, or multiple pieces, try the Clay Calculator. It can help estimate clay volume, wet weight, shrinkage, total material needed, and other project measurements.
Using the two calculators together can make it easier to plan the amount of clay and glaze needed for a pottery project.
Common Mistakes to Avoid
Guessing ingredient amounts: Weigh dry ingredients with a digital scale instead of estimating by volume.
Changing the batch size without scaling the recipe: Recalculate every ingredient when making a larger or smaller batch.
Adding all the water at once: Start gradually and adjust the mixture as needed.
Skipping test batches: Test a new glaze on a small scale before preparing a large production batch.
Not recording successful recipes: Save recipes that work well and document the clay body, firing schedule, specific gravity, and other useful details.
Frequently Asked Questions
Can beginners use this Glaze Calculator?
Yes. It can be used by hobby potters, students, teachers, ceramic artists, studio potters, and experienced professionals.
Can I scale a glaze recipe?
Yes. Enter the original batch weight and your desired batch weight. The calculator adjusts the ingredient amounts while maintaining the original proportions.
Why are glaze recipes written as percentages?
Percentages make it easier to understand the ratio of ingredients and scale a recipe to different batch sizes.
Can I calculate glaze ingredient costs?
Yes. Enter the material, weight, and price to estimate the total cost and the cost per gram or kilogram.
Is the water estimate exact?
No. The water estimator provides a starting point. Actual water requirements can vary depending on the ingredients, preparation method, and desired glaze consistency.