Answer: 45 inches Explanation: While our driveways are typically poured no less than 5” thick, we typically pour the concrete slab the same as the rest of the house, 4”5” thick. Reason being, garages poured with the house have deeper footings that match the house as well as more steel to be able to withstand the weight of the house and to further minimize risk of settling/movement of your slab. Also, vehicles, that are parked inside of a garage, are typically smaller/lighter cars, while driveways have a much wider range of vehicles(some larger/heavier) that may drive on them. Such as a friend or family member just visiting or someone lost using your driveway to turn around. 
Christian Campbell 
Answer: 45 inches Explanation: The standard slab thickness for a residential concrete garage floor is typically 46 inches. This range provides sufficient strength to support the weight of vehicles and withstand the additional stresses associated with garage use, such as the movement of cars, light trucks, and occasional heavy loads.
A 4inch slab is generally adequate for standard passenger vehicles, while a 6inch slab is recommended for heavier vehicles or more frequent use. Proper reinforcement with rebar or wire mesh, along with wellprepared subgrade and proper drainage, ensures the garage floor's durability and longevity. 
Midtex Services 
Answer: 34 inches Explanation: standard thickness is 3.64 also depending on what its used for or how much weight is on it... 
Infinity Custom Concrete & Construction 

ProMatcher 
Answer: 56 inches Explanation: Garage floors are heavily used and provide support to the balance of the foundation along with proper sized stem walls 
United Concrete Contractors LLC 
Answer: 45 inches Explanation: This is the standard thickness for garage floor. 
Cannon Concrete 
Answer: 45 inches Explanation: Garage floors are normally 4 inches thick. You can go 5 inches where the door is over the footing. 
D&L Concrete LLC 

ProMatcher 
Answer: 45 inches Explanation: 45 inches is a ideal depth of a garage floor. A thicker floor might be required if any heavy equipment or heavier vehicles are stored on the pad. 
Jamieson Construction 
Answer: 45 inches Explanation: Depending on the weight that will be distributed on the surface. 
RP Enterprises 
Answer: 56 inches Explanation: concrete must to 5 to 6 inches tick for reinforcement and use rebars for the footings to reinforce 
RAMOS CONCRETE CONSTRUCTION 

ProMatcher 
Answer: 45 inches Explanation: Industry standard for residential garage floor thickness is 45" with a thickened edge where load transfer occurs. 
Maven Group LLC 
Answer: 45 inches Explanation: Its the average standard for strength and durability of concrete for its purpose to accomidate average vehicles. 
BAT Concrete llc 
Answer: 34 inches Explanation: Same as driveways 
QUALITY CONTRACTORS 

ProMatcher 
Answer: 45 inches Explanation: Garage floors are 35 inches 
Design4 
Answer: 45 inches Explanation: If placed proper on compacted material with reinforced concrete 4 to 5 inches is good. 
Concrete services 
Answer: 45 inches Explanation: The standard thickness will depend on the use of the garage. We find that 4 inches of 3000 psi concrete is adequate for most applications. 
Alliance Construction 

ProMatcher 
Answer: 56 inches Explanation: We use 5"to6" thick concrete if there will be heavy trucks driving on it. 
A to Z Fence and Concrete 
Answer: 45 inches Explanation: 4 is sufficient if done correctly with 8 in perimeter 
DIRTCO CONSTRUCTION 
Answer: 56 inches Explanation: All residential garage slabs should be poured over well compacted fill at 5 to 6 inches thick with footers 
Lals Concrete Company,LLC 

ProMatcher 
Answer: 45 inches Explanation: The standard is 45 inches with 4000 psi concrete with steel mesh or fiber 
h and h company 
Answer: 34 inches Explanation: Residential concrete garage slabs are typically 4" 
Concrete & Beauty Design 
Answer: 45 inches Explanation: Yes 
Garcias Concrete Service LLC, 