Why Your Dice Roll Unevenly and How to Fix It

Quick answer

Most uneven rolls come from manufacturing defects like air bubbles or off-center weight, or from wear such as chipped edges or absorbed moisture. Start by testing your die with a saltwater float or a roll-frequency check. If it fails, replace it—especially for metal or gemstone dice where repair isn't practical.

You're in the middle of a crucial battle, you roll your d20, and it lands on a 2. Again. You start to wonder if your dice are cursed or just badly made. Uneven rolls are a common frustration, but they usually have a physical cause you can identify and address.

This guide will help you diagnose why your dice roll unevenly. We'll cover the most likely culprits, from manufacturing flaws to wear and tear, and give you practical steps to fix or replace problematic dice. By the end, you'll know when to salvage a die and when to retire it for good.

Symptom: Your die consistently favors certain numbers

If you notice that a particular die lands on high numbers more often than low ones—or vice versa—it's a clear sign of imbalance. This can happen with any die, but it's more common in dice made from dense materials like metal or stone, where internal voids or uneven weight distribution can skew results. Even slight imbalances can affect gameplay over many rolls.

Keep a log of 50 to 100 rolls for the suspect die. If one side comes up significantly more than others, the die is likely unbalanced. This simple test gives you concrete data before you decide to repair or replace.

• Track rolls over multiple sessions to rule out random chance.
• Compare the frequency of opposite faces—a fair die should show each roughly equally.

Likely cause: Manufacturing defects or material inconsistencies

Mass-produced plastic dice often have internal air bubbles or inconsistent density from the molding process. Metal dice can suffer from similar issues if the alloy isn't poured evenly. Gemstone dice, while beautiful, may have natural inclusions or voids that affect balance. These defects are usually invisible from the outside, making them hard to detect without testing.

Even high-end dice can have flaws. For example, glass dice like the Ebony Cats Eye set are made from thin optic glass fibers spun together, which creates a dense but potentially uneven internal structure. While this process yields stunning visuals, it can also introduce slight imbalances if the fibers aren't perfectly distributed.

• Inspect dice under bright light for visible bubbles or cracks.
• Roll on a soft surface to reduce bounce and hear for rattling sounds that indicate internal voids.

Corrective action: Test and, if needed, replace

The saltwater float test is a classic method: dissolve enough salt in water so the die floats, then spin it. If it consistently returns to the same face, that side is heavier. For metal dice, this test is less reliable because they often sink, but you can still check for wobble. If a die fails, there's no practical way to rebalance it at home—replacement is the best option.

When choosing replacements, consider dice known for consistent manufacturing. Brands like Norse Foundry offer a range of materials, from aircraft-grade aluminum to gemstone, each with different balance characteristics. For critical rolls, many players prefer precision-machined metal dice over mass-produced plastic.

• Use the saltwater test for plastic and resin dice only.
• For metal dice, roll on a hard surface and listen for a consistent sound—a dull thud may indicate internal flaws.

When to stop troubleshooting and choose a different die

If a die has visible cracks, chips, or has absorbed moisture (common in wooden or porous stone dice), it's unlikely to ever roll fairly again. Repairing such damage is often impractical and can compromise the die's integrity. At that point, retire it as a decorative piece or a loaner die for casual games.

Also, if you've tested a die multiple times and it still shows bias, don't waste more time. Replace it with a die from a reputable maker. For example, the Green African Jade Boulder® 30mm Gemstone Dice is a solid choice for players who want a hefty, natural stone die that's less prone to hidden voids due to its size and material density.

• Set a limit: if a die fails two tests, replace it.
• Keep a few spare dice on hand for important rolls.

Diagnosis checklist: Is your die unbalanced?

• Visual inspection: Look for bubbles, cracks, or uneven surfaces that could indicate internal flaws. If you see obvious defects, replace the die.
• Saltwater float test: For plastic and resin dice, see if the die consistently returns to the same face. If it does, the die is unbalanced.
• Roll frequency test: Roll the die 50-100 times and record results. A fair die should show each face roughly equally. If one side appears significantly more often, consider replacement.

Dice that address common balance concerns

• Ebony Cats Eye - 7 Piece RPG Set Glass Dice: Made from thin optic glass fibers spun together to create gemstones with a dense structure. The dense, layered construction can reduce the chance of large internal voids, but glass dice should still be tested for balance.
• Green African Jade - Boulder® 30mm Gemstone Dice: Features a mystical combination of dark and light green with marbled patterns, found in mineral deposits in South Africa. Natural gemstone dice like this are often more uniform in density than composite materials, but natural inclusions can still affect balance.
• Single Wondrous Dice® D20 in Eldritch by Norse Foundry 6063 Aircraft Grade Aluminum: The D20 is approximately 20mm and made of 6063 Aircraft Grade Aluminum. Aircraft-grade aluminum is known for its consistent density, making it a good choice for players seeking a balanced metal die.

Uneven rolls are usually a sign of a physical flaw or wear, not bad luck. By testing your dice and replacing the ones that fail, you can ensure fairer rolls and a better game experience. Remember, even the most beautiful dice can be unbalanced—so test before you trust them with your character's life.