How much slope is needed for a slab in a garage?

A common recommendation for the slope of a garage slab is 1-2% (or 1/8 to 1/4 inch per foot) to ensure proper drainage. This slight slope helps direct water away from the garage door and prevents flooding or pooling. It's important to ensure that the slope does not interfere with the functionality of the space or the installation of any flooring. Always check local building codes for specific requirements in your area.