Questions about fair play often start with the dice. Are they ever loaded, marked, or quietly swapped at the table? In regulated casinos, controls are designed to make that unlikely.
This guide explains how dice could be manipulated in theory, then shows what actually happens in practice. You will see how dice are manufactured to tight standards, how they are tested and replaced, and how table procedures and surveillance work together to protect the game. We also touch on the roles of regulators and independent labs, plus what fairness looks like online.
Understanding these checks can make play more transparent. If you ever have concerns on the floor or online, staff can explain the procedures and point you to support if you need it.
Dice can be altered, but doing so in a regulated casino is both illegal and very hard to get away with. A “loaded” die is modified so certain faces become more likely to land face down. Cheats might add weight under a pip, shave or sand a face to change dimensions, or slightly round specific edges. Even tiny changes can influence how a die settles.
Marking is another tactic. Subtle differences in finish, tiny scratches, or patterns that a cheater recognises can be used to identify faces. Some methods involve chemicals that leave a faint trace visible only under particular lighting or lenses.
These approaches need planning and access, which is why casinos employ layers of controls to block them. From the way dice are made to how they are issued, handled, and monitored at the table, the process is designed to prevent interference. If you ever suspect cheating, report it to a member of staff right away.
Casino dice are built to precise tolerances so each face has the same chance of landing. They are typically cut from clear acrylic into perfect cubes, with sharp edges and corners to reduce rolling patterns that rounded dice might produce. Each “pip” is drilled to a uniform depth, then filled with material that closely matches the density of the removed acrylic so the overall balance is preserved.
Manufacturers check dimensions with precision tools and reject dice with even minor imperfections. Many batches are laser-inspected for symmetry and uniformity, and each die receives a unique serial number. Logos and serials help casinos track stock and spot anything that does not belong on the table.
These build standards set the baseline for fairness. What happens next is just as important, which is where inspection and testing come in.
Before dice reach a table, staff inspect them under magnification for chips, scratches, or inconsistencies in finish. Dimensions and weight are measured against tight tolerances, and colours, pips, and serial numbers are checked against records from the supplier.
Simple balance checks are often used. One common method is to float a die in a carefully prepared saltwater solution to see if any face consistently rotates to the top, which can indicate a weight bias. Some teams also perform spin or balance tests to confirm there is no irregularity.
Records of these checks are kept so the casino can show when dice were received, issued, inspected, and retired. If a player or dealer raises a concern, supervisors can remove the dice from play and review the batch history.
With equipment verified, attention turns to how dice are handled in live play, where clear procedures close off most opportunities to interfere.
Casinos use set procedures so dice remain visible, controlled, and verifiable throughout each game. Dealers display the dice openly and only the shooter handles them, and then only when it is their turn. Before a new shooter rolls, the dealer spreads several dice and invites the player to pick two in full view of the table, which helps confirm nothing has been switched.
Players are usually asked to use one hand when throwing. Dice are expected to touch the far wall of the table so the bounce cannot be easily controlled, and throws that do not meet this requirement can be called “no roll.” If a die leaves the table or appears damaged, a supervisor can remove the set and issue a replacement.
Surveillance monitors the same actions from above, so the procedures are backed by constant oversight. Of course, rules are only part of the story, which raises a common question about the people at the table.
Attempted cheating does occur in the wider world, but in regulated casinos, it is rare and risky. Dealers follow tightly defined routines and are supervised by pit bosses and surveillance, so swapping or altering dice would be difficult to hide. Staff rotations, table audits, and strict custody of equipment further reduce opportunities.
Players who try sleight of hand, concealed dice, or unusual throwing techniques are watched closely. Irregular behaviour can lead to the game being paused while staff investigate, and serious incidents are escalated to management and, if necessary, law enforcement.
Consequences can include being barred from the premises and formal reports to authorities. If you see something suspicious, alert a dealer or supervisor so it can be checked right away.
Surveillance teams use multiple cameras to cover every angle of the gaming floor, with close views of tables and the area where dice are handled. They look for unusual hand movements, attempts to introduce foreign objects, or signs that a die has been swapped or damaged. Time-stamped recordings allow detailed review after an incident is reported.
On the floor, dealers and pit bosses keep communication lines open with surveillance so concerns can be assessed immediately. Modern systems use high-resolution imagery and powerful zoom to scrutinise small details, and incident logs help track patterns over time.
Even with all that technology, one of the simplest protections is routine replacement. Fresh, verified dice keep the game moving and remove any that show wear.
Dice do not stay pristine for long. Edges can pick up tiny nicks, pips can fade, and surfaces can wear. To prevent this from affecting outcomes, casinos replace dice on a set schedule that reflects table traffic. Busy tables typically see more frequent changes, sometimes several times in a day.
Staff check dice during play and retire any that show damage or irregularities. Many casinos also rotate colours or serial ranges by shift, which makes it easier to confirm the correct dice are in use. Retired dice are usually cancelled so they cannot be brought back to the table later.
Regular replacement supports the inspections discussed earlier, keeping equipment within spec from first roll to last.
In the UK, the Gambling Commission sets requirements for how casinos operate, including the technical standards for equipment. Casinos must be able to show that their dice are sourced, handled, tested, and replaced in ways that meet these rules.
Independent testing labs, separate from both the casino and the regulator, provide further assurance. They examine equipment for balance and uniformity and review procedures to confirm compliance with applicable standards. Audits and documentation help prove that checks are not one-off events but part of ongoing control.
For players, this framework means there are multiple layers of oversight, from the factory to the felt. The same principle applies online, where software takes the place of physical dice.
Online dice outcomes are produced by Random Number Generators, software designed to generate unpredictable results that reflect the probabilities of a real roll. For UK-licensed operators, these systems are tested and certified by independent labs to confirm that results are random and that games meet regulatory standards.
You might see certificates or audit seals on operator sites, which indicate that tests have been performed and the games continue to operate within expected ranges. Regulators and labs can also review performance over time, so fairness is monitored rather than assumed.
If you decide to play online, set clear limits and take breaks, and never play with money needed for essentials. If gambling is starting to affect your finances or well-being, organisations such as GamCare and GambleAware offer free, confidential support.
Taken together, careful manufacturing, routine testing, clear table procedures, vigilant surveillance, and regulatory oversight make it difficult for loaded or marked dice to slip into play and stay there.
**The information provided in this blog is intended for educational purposes and should not be construed as betting advice or a guarantee of success. Always gamble responsibly.