Estimate how much data your video streaming uses per month based on video quality, daily watch time, and days streamed — and see it against your data cap.
Pick the video quality you usually stream at, enter your average hours streamed per day and days streamed per month, and enter your monthly data cap in gigabytes. Click Calculate to see your estimated monthly data usage, how much of your cap that uses, and the daily and hourly usage behind it. Click Clear to reset all fields.
The formula
Streaming video is delivered at a bitrate, measured in megabits per second (Mbps). To convert a bitrate into data volume: GB per hour = bitrate (Mbps) × 3,600 seconds ÷ 8 bits per byte ÷ 1,000 (to get gigabytes), which simplifies to GB per hour = bitrate (Mbps) × 0.45. This calculator uses typical average streaming bitrates for each quality tier: about 3 Mbps for SD (480p), 5 Mbps for HD (720p), 8 Mbps for Full HD (1080p), and 25 Mbps for 4K Ultra HD. Actual bitrates vary by streaming service, content, and network conditions, since most services use adaptive bitrate streaming that adjusts in real time — these are representative averages, not a guarantee for any specific service.
Daily usage is the hourly rate multiplied by hours streamed per day, and monthly usage is daily usage multiplied by days streamed per month. Dividing monthly usage by your data cap gives the percentage of your plan the streaming would consume.
Interpreting the results
The highlighted cards show your estimated monthly data usage and what share of your data cap that represents. If the share exceeds 100%, your streaming habits alone would exceed your plan's allowance before accounting for any other internet use. The supporting cards show the daily usage and the hourly streaming rate implied by your selected quality, so you can see how quality changes add up.
Frequently Asked Questions
How much data does streaming video actually use?
It depends heavily on quality. Using this calculator's typical bitrates, one hour of streaming uses roughly 1.35 GB at SD (480p), 2.25 GB at HD (720p), 3.6 GB at Full HD (1080p), or 11.25 GB at 4K Ultra HD. Multiply the hourly figure by your daily and monthly viewing hours to estimate total usage.
Why do different streaming services report different data usage?
Most streaming services use adaptive bitrate streaming, which raises or lowers video quality in real time based on your network speed and device. The bitrates used here are representative averages for each resolution tier, not the exact encoding settings of any single service, so your actual usage may be somewhat higher or lower.
How can I reduce my streaming data usage?
Lowering the video quality setting has the biggest effect, since data usage scales directly with bitrate — dropping from 4K to Full HD alone cuts usage by roughly two-thirds. Many streaming apps also let you set a data-saver or manual quality cap, and downloading content over Wi-Fi for offline viewing avoids repeated streaming data entirely.
What counts toward my monthly data cap?
Check your internet or mobile plan's terms — most home broadband and mobile data plans count all data transferred, including streaming, downloads, and browsing, toward a single monthly cap. This calculator only estimates the streaming portion; add your other usage separately to see your total against the cap.