Windshield Chip vs Crack: What’s the Difference?

What is the difference between a windshield chip and a crack?

A chip is a compact break around one impact point, and a crack is a line that travels through the glass. That is the plain answer, but the official terms are more exact. ROLAGS 002-2022 is the American National Standard for repairing laminated auto glass. It lists “chip”, “ding” and “stone break” as non-technical words the public uses for windshield damage.

The standard gives no size or shape for a chip. It names the break types instead, and each type has its own repair limit. It defines a crack as a “single line of separation that may emanate from an impact point.”

Both kinds of damage happen in a laminated windshield. ROLAGS defines laminated glass as two or more glass layers with a non-glass layer between them. Pilkington says that plastic layer holds the glass splinters in place and resists penetration. ROLAGS calls one glass layer a lite. ROLAGS describes repair on the exterior surface. Damage on the inner lite means replacement.

Chip types and what the standard calls them

ROLAGS names four break types that match what drivers call a chip: bullseye, half moon, star break and combination break. A fifth, the surface pit, is wear rather than a true break. The table matches each everyday description to its ROLAGS term and its largest repairable size.

ROLAGS term	What it looks like	Largest repairable size
Bullseye	A separated cone in the outer glass that shows as a dark circle with an impact point	1 in (25 mm) across
Half moon	A partial bullseye	1 in (25 mm) across
Star break	A series of legs spreading from the break	3 in (75 mm) across
Combination break	Mixed features, such as a star inside a bullseye, or cracks leaving the damage	Body 2 in (50 mm), legs not counted
Surface pit	A wear nick that stops short of the plastic layer	Counts as damage from 1/8 in (3 mm)

ROLAGS defines legs as subsurface cracks that leave the break. So a star break already contains small cracks, and the chip and crack categories overlap. The ROLAGS website summarizes stone breaks as repairable up to 2 inches, while the standard’s own table gives 3 inches for a star break. Worn glass with many small nicks has its own guide on how to repair a pitted windshield.

Crack types: short, long, edge, floater and stress

ROLAGS sorts cracks in three ways: by length, by whether they reach an edge, and by whether they have an impact point. One crack therefore carries more than one label. A 9-inch crack in the middle of the glass is both a long crack and a floater crack.

Crack type	ROLAGS definition	Repair position
Short crack	6 in (150 mm) or less	Repairable
Long crack	More than 6 in (150 mm)	Repairable up to 14 in (350 mm)
Floater crack	Does not reach an edge	Repairable within the length limit
Edge crack	Reaches an edge	Do not repair if it meets more than one edge
Stress crack	Runs from an edge with no impact point	Do not repair

Cracks do not always come from a chip. ROLAGS names two basic causes of damage. Impact is the most common. Stress or twist is the other, from the vehicle frame flexing or from improper mounting. For the full list of triggers, see what causes windshield cracks.

How to tell which one you have

The fastest way to sort the damage is to find the impact point and then trace what leaves it. These steps adapt the checks in Infiniti and Honda dealer bulletins, which technicians use to tell impact damage from stress cracks. A shop still makes the final call, because ROLAGS tells the technician to inspect from inside and outside the glass.

A single line with no impact point that starts at the edge fits the ROLAGS stress crack definition. Infiniti warns that an impact crack can run to the edge and look like a stress crack, and a 10X magnifier may be needed to see small marks. Faint damage is covered in how to check a windshield for hidden cracks.

Which can be repaired: chips, cracks and location

Chips and cracks inside the size limits can be repaired, and location can overrule size. ROLAGS defines the driver’s primary viewing area as a band 12 inches wide, centered on the driver, from the top to the bottom of the wiper sweep. Inside that band, replacement is recommended when damage is larger than 1 inch across. It is also recommended when a repair would sit within 4 inches of another repair.

Some damage should not be repaired at any size. The ROLAGS list includes damage through both glass layers, damage on the inner layer, a pit over 3/8 inch and discolored plastic interlayer. Damage where a repair may harm a value-added feature, such as a camera zone, is on the list too.

Rulebook	Chip limit	Crack limit
ROLAGS 002-2022	1 to 3 in, by type	14 in
Safelite	Impact point smaller than a dime, no more than 3 chips	Under 6 in
State Farm	Small breaks not in front of the driver	Under 6 in, fewer than 3 cracks

A shop can decline a repair that the standard allows. To work through all of these gates for your car, see windshield repair vs. replacement. Exact limits by length are in how big a windshield crack can be repaired.

How a chip turns into a crack

A chip becomes a crack when a leg or line grows out of the original break. Infiniti’s dealer bulletin says cracks can spread from the strike point through temperature changes and physical stress. Its examples include hand touch, wind force and road vibration from potholes.

That growth changes which limit applies. A bullseye judged at 1 inch becomes a combination break once cracks leave it. At three or more long cracks from one impact point, ROLAGS says to replace.

ROLAGS says a repair by a trained professional usually stops the damage from spreading by adding strength to the area. It also usually improves optical clarity and restores a smooth surface for the wipers. Safelite adds two limits. A repair attempt can sometimes make a chip or crack larger, and the repair may not be invisible. Timing and growth are covered in will a windshield crack spread.

How inspection rules treat chips and cracks

Inspection rules set their own numbers for chips and cracks, and those numbers differ from the repair standard. A repair limit says what can be fixed. An inspection limit says what can stay on the road. The rules below are examples, so check the current text for your state.

Rule	Chip or star	Crack
New York, 15 NYCRR 79.21	Reject a star over 3 in	Reject over 11 in with any part in the wiper path
Virginia, 19VAC30-70-210	Reject a pit, chip or star crack over 1 1/2 in above the 3-inch line at the bottom	Reject more than one crack from a point if one exceeds 1 1/2 in above that line
49 CFR 393.60 (buses and trucks)	Allowed if a 3/4-in disc covers it, 3 in from similar damage	Allowed if no other crack crosses it

The federal rule covers commercial vehicles such as buses, trucks and truck-tractors, within a set area of the windshield. State rules apply to passenger cars where a state runs inspections. More states are listed in will a car pass inspection with a cracked windshield.

Frequently asked questions

Is it a chip or a crack?

It is a chip if the damage stays compact around one impact point, and a crack if a single line runs through the glass. Damage with both features is a combination break under ROLAGS.

Is a chip or a crack worse?

Neither type is always worse, because location and condition matter too. A 1 1/2-inch star break in the driver’s viewing band calls for replacement under ROLAGS, while a 10-inch floater crack elsewhere can qualify for repair under the standard.

Is a star break a chip or a crack?

Drivers usually call a star break a chip. ROLAGS treats it as a break with legs, and it defines legs as subsurface cracks. Honda’s bulletin uses the term “star chips” and says stones usually cause them.

Does insurance treat chips and cracks differently?

Insurers can set separate limits for each. State Farm says it typically repairs small breaks not in front of the driver and cracks under 6 inches, and that a deductible may apply. Read more on whether you have to pay a deductible for windshield repair.

What is the difference between a scratch and a crack?

A crack is a line of separation in the glass, while a scratch is surface wear. ROLAGS lists no scratch among its repairable damage types. See how to remove scratches from a car windshield at home.

Sources

• ANSI/AGSC/NWRD/ROLAGS 002-2022, Repair of Laminated Automotive Glass Standard (checked 1 November 2026)
• ROLAGS, What Types of Damage Can Be Repaired (checked 1 November 2026)
• Infiniti Technical Bulletin ITB09-039K, Windshield Cracking (NHTSA)
• Honda Service Bulletin 20-118, Windshield Is Cracked With No Sign of Impact (NHTSA)
• Pilkington Technology Datasheet 6, Shaping and strengthening
• Safelite, Windshield Repair
• Safelite Help Center, Glass damage and service
• State Farm, Windshield Repair
• 49 CFR 393.60, Glazing in specified openings (FMCSA) (checked 1 November 2026)
• 15 NYCRR 79.21, New York inspection procedure (checked 28 October 2026)
• 19VAC30-70-210, Virginia windshield inspection rules (checked 28 October 2026)