Gigabit fiber internet is high-speed internet that transmits data over fiber optic cables at 1 gigabit per second, or 1 Gbps for short. A gig fiber connection will provide around 1,000 Mbps download and 1,000 Mbps upload —but you won't always see those numbers if you run a speed check on your computer. That bandwidth is shared between all your devices, and there are other factors that affect the speed of your connection. 1 gig is equal to 1,000 megabits per second (Mbps). To put that in perspective, gig speeds allow you to download large files in seconds, stream ultra-high-definition. According to a 2024 analysis, the average U.