Security Camera Upload Bandwidth Checker

## Why cameras care about upload speed, not download Every security camera constantly sends video *up* — to the cloud or to your phone app. Most home internet plans are lopsided: 100 Mbps down might come with only 10 Mbps up. When your cameras need more upload than your plan gives, live feeds freeze, motion alerts arrive late, and recordings develop gaps. Buyers almost always compare download speeds and never think about the other direction, which is exactly why this check matters before you mount anything. ## How the bandwidth math works A camera's bitrate comes down to three things: resolution, frame rate, and whether it records around the clock. This checker uses typical H.264 figures: about 1 Mbps for 720p, 2 Mbps for 1080p, 4 Mbps for 2K and 8 Mbps for 4K at 30 frames per second. Dropping to 15 fps cuts each camera's bitrate by roughly 40 percent. Motion-triggered recording cuts the average to about a third of 24/7 recording, because most of the day nothing moves in frame. Multiply the per-camera bitrate by your camera count, then compare the total with your plan's upload speed. ## Worked example Take four 1080p cameras recording 24/7 at 30 fps on a plan with 20 Mbps upload. Each camera needs 2 Mbps, so four need 8 Mbps — that's 40 percent of your upload, a comfortable fit with room to spare for video calls and everything else. Now try six 4K cameras on the same plan: each needs 8 Mbps, the total is 48 Mbps, and that's 240 percent of your upload — the feed would be a slideshow. Switch those 4K cameras to motion-triggered recording and the average drops to about 16.8 Mbps, or 84 percent — tight, but workable without upgrading your plan. ## Practical tips Run a speed test at night and use your *real* upload number, not the advertised one. Set motion detection zones so the cameras ignore streets and trees — false triggers are what inflate the average. If your cameras support H.265, turn it on; it roughly halves the bitrate for the same quality. And put the recorder or NVR on a wired connection so its own uploads never fight your cameras for Wi-Fi airtime.