Testing glaze line blends is one of the most useful ways to explore colour, opacity and surface variation in ceramics. This Glaze Line Blend Calculator makes it quick and simple to plan your glaze tests accurately.
Instead of manually calculating percentages and measuring cups, the calculator instantly generates the correct line blend ratios so you can focus on the creative side of testing.
Perfect for testing additions such as tin oxide, cobalt oxide, iron oxide, rutile, copper carbonate and other glaze materials.
What the Calculator Does
The calculator allows you to:
• Enter your base glaze recipe
• Automatically check that your recipe totals 100%
• Normalize recipes back to 100% if needed
• Enter an addition material (for example tin oxide)
• Set the maximum addition percentage
• Choose the number of tests in your line blend
• Set the ml per test cup
The calculator then generates a clear line blend table showing:
• Test number
• Actual % addition
• Base glaze ml
• Base + addition ml
• Blend ratios
This makes preparing glaze tests fast and reliable.
Studio Mixing Tracker (Paid Version Bonus)
The Studio Version includes a special feature designed for real studio use.
As you mix each test cup you can simply tap the line blend row, which highlights it in light green so you know exactly which blends have already been mixed.
This is incredibly useful when working with multiple cups and glaze buckets in the studio.
Additional Features
The full version also includes:
• PDF export for printable glaze test sheets
• Offline use – works without internet
• Works on phone, tablet or computer
• Can be saved to your phone home screen like an app
• Simple, clean interface designed for potters
Free Version vs Studio Version
A free browser version of the calculator is available on the website.
The Studio Version (£5) unlocks:
• PDF export for printing test sheets
• Clickable mixing progress tracker
• Offline studio use
• Downloadable tool you can keep and reuse anytime
Perfect For
This tool is ideal for:
• Studio potters
• Ceramic students
• Glaze researchers
• Anyone exploring glaze chemistry and surface variation