What is the difference between .50 cal and .68 cal paintballs? The key difference between .50 cal and .68 cal paintballs is size, weight, and impact: .68 cal is the industry standard used at most fields, while .50 cal is smaller, lighter, and hurts significantly less, making it the go-to for low-impact play. The two are not interchangeable — each requires its own marker — and the caliber you choose affects pain, cost, and which fields will let you play.
| Feature | .50 Cal | .68 Cal |
|---|---|---|
| Diameter | 0.50 in (12.7 mm) | 0.68 in (17.3 mm) |
| Weight per ball | ~1 gram | ~3 grams |
| Impact/pain | Light tap, rarely welts | Sharp sting, welts and bruises common |
| Cost per 2,000 rounds | $40–$70 | $30–$60 |
| Marker availability | Limited selection | Vast — $100 to $1,500+ |
| Field standard | Low-impact/rental programs | Industry standard worldwide |
| Minimum age (typical) | As young as 8 | 10–12 |
The Size Difference
The numbers refer to the diameter of the paintball in inches. A .68 caliber paintball is about 0.68 inches (roughly 17.3 mm) across. A .50 caliber paintball is about 0.50 inches (roughly 12.7 mm) across. That might not sound like much on paper, but pick up one of each and the difference is obvious. A .68 cal ball is close to the size of a large marble. A .50 cal ball looks more like a gumball.
Because of that size gap, a .50 cal paintball weighs significantly less — roughly 1 gram compared to about 3 grams for a .68 cal ball. That weight difference drives most of the practical differences between the two.
Impact and Pain
This is usually the first question people ask, and the answer is clear: .50 cal paintballs hurt less. A lot less.
The lighter, smaller ball carries less kinetic energy at the same velocity. Most fields chronograph .50 cal markers at around 250 to 280 feet per second, similar to .68 cal, but the lower mass means the energy transferred on impact is roughly one-third of what a .68 cal ball delivers. The hit feels more like a firm tap than a rubber band snap. You will still feel it, but welts and bruises are far less common.
This reduced impact is the entire reason .50 cal paintball exists. It was developed specifically to make the sport more accessible to people who are nervous about pain — especially younger players and first-timers. If you have been wondering how much paintball actually hurts, the answer depends heavily on which caliber you are playing with.
Cost Per Round
Here is where .50 cal loses some of its appeal. Despite being smaller, .50 cal paintballs typically cost more per round than .68 cal paint. A case of 2,000 rounds of .68 cal paint usually runs $30 to $60 depending on quality. A case of 2,000 rounds of .50 cal paint often costs $40 to $70 or more.
The price difference comes down to production volume. The .68 cal market is enormous — it has been the standard for decades, and manufacturers produce it at massive scale. The .50 cal market is smaller, so economies of scale have not caught up. You are paying a premium for a niche product.
That said, .50 cal players tend to use less paint per game. The smaller hoppers hold fewer rounds, the markers often have lower rates of fire, and low-impact sessions are typically structured to discourage the spray-and-pray approach. So while the per-round cost is higher, your total paint bill for a day of play might end up comparable. For a full picture of what a day on the field costs, check out our guide to paintball pricing.
Marker Compatibility
This is a critical point: .50 cal and .68 cal paintballs require different markers. You cannot load .50 cal paint into a .68 cal gun and expect it to work. The barrel bore, the feed system, and the bolt are all sized for a specific caliber. Trying to mix them will give you terrible accuracy at best and jammed internals at worst.
A handful of markers offer caliber conversion kits that let you swap between .50 and .68, but these are the exception rather than the rule. Most players and most fields commit to one caliber or the other.
The .68 cal marker market is vastly larger. You can find everything from $100 rental-grade mechanical guns to $1,500 tournament electropneumatic markers. The .50 cal marker market is much smaller, with fewer brands and fewer options at each price point. If you plan to buy your own gear and want the widest selection, .68 cal is where the choices are.
Which Caliber Do Fields Use?
The overwhelming majority of paintball fields in the United States and worldwide run .68 cal as their standard. It has been the industry standard since the sport began in the 1980s, and the entire infrastructure — markers, hoppers, paint manufacturing, barrel sizes — is built around it.
However, many fields now offer .50 cal as an alternative, usually marketed as “low-impact paintball.” This is typically a separate program that runs alongside regular paintball, often on the same fields but during dedicated time slots or in designated areas. The low-impact option usually comes as a complete rental package: a .50 cal marker, a mask, a hopper, and a set amount of paint, all bundled at a fixed price.
Some fields have gone fully .50 cal for their rental operations and reserve .68 cal for players who bring their own equipment. This approach has become popular at fields that cater heavily to birthday parties, corporate events, and walk-on groups.
If you are visiting a field for the first time, call ahead and ask what caliber their rental packages use. It is increasingly common for fields to offer both.
Low-Impact .50 Cal for Kids and Beginners
The biggest win for .50 cal paintball is how it has opened the sport to younger players and hesitant newcomers. Before low-impact options existed, many fields set their minimum age at 10 or 12 because .68 cal hits were considered too intense for smaller kids. With .50 cal, some fields now welcome players as young as 8.
For parents considering paintball for their child’s birthday party, low-impact .50 cal is a game changer. The lighter hits mean fewer tears, fewer kids sitting out after their first elimination, and more time actually playing. The markers are also lighter and smaller, which makes them easier for kids to handle.
Adults benefit too. If you are bringing a group of friends who have never played before and some of them are on the fence, low-impact paintball removes the biggest objection most newcomers have. Once people realize it does not hurt as much as they feared, they are far more likely to come back and eventually try the full .68 cal experience.
Which One Should You Play?
For experienced players, regular players, and anyone who wants to buy their own gear, .68 cal is the standard for good reason. The equipment selection is wider, the paint is cheaper per round, the range and accuracy are better at distance, and the vast majority of organized play — from recreational walk-ons to tournaments — runs on .68 cal.
For kids, absolute beginners, and groups where pain tolerance is a concern, .50 cal low-impact paintball is an excellent entry point. It delivers the same core experience — the strategy, the teamwork, the adrenaline — with significantly less sting.
If you are trying to figure out which paint to buy for your own marker, our guide to the best paintballs covers top options for both calibers and different playing conditions.