Data Usage Calculator
Estimate how much data an activity uses per month, and check it against your data cap. Pick an activity or enter a custom rate, set your hours per day, and see the monthly gigabytes, the share of your plan it eats, and how many hours a day stay within the cap.
Last updated: June 2026
Pick an activity or enter a data rate and your hours per day above.
Monthly GB = rate (GB per hour) × hours per day × 30 · the cap share and safe hours per day follow from your data cap
How to estimate your monthly data usage
Every online activity burns data at a fairly predictable hourly rate, so your monthly total is just that rate multiplied by how long you do it and by the days in the month. The rates differ enormously: an hour of standard-definition video is under a gigabyte, but an hour of 4K streaming is around seven, so the same two hours a day of viewing can mean 42 GB a month or 420 GB depending only on the quality setting. That single fact is why a data cap that feels generous for browsing disappears in a week of high-definition streaming.
The activities that actually drain a data cap
Video is the whole story. Streaming, video calls and screen sharing move far more data than anything text-based, and resolution multiplies it: SD is roughly 0.7 GB per hour, HD around 3, and 4K near 7. Music streaming is light at about 0.15 GB per hour, web browsing and social feeds around 0.1, and the surprise for many people is that playing an online game uses very little live data, roughly 0.05 GB per hour. What blows a gaming budget is not the play, it is the downloads: a single modern game or update can be 50 to 150 GB in one hit, so treat those as separate one-off events rather than an hourly rate.
Reading the result against your plan
Once you know the monthly gigabytes, comparing it to your cap answers the real question: will you run out? The calculator shows the share of your plan the activity uses and the maximum hours a day you could keep it up without going over. If a single habit already eats most of the cap, that is your signal to drop the streaming quality, shift big downloads onto Wi-Fi, or move to a larger plan. Remember the figure is for one activity; add each streamer, caller and gamer in the household to see the true monthly load.
Worked example
Two hours a day of HD streaming at 3 GB per hour is 3 times 2 times 30, which is 180 GB a month. On a 50 GB mobile cap that is 360 percent of the plan, over by 130 GB, and to stay within the cap you would have to hold that HD streaming to about 0.6 hours a day. Drop the same two hours to SD at 0.7 GB per hour and the month falls to 42 GB, which fits inside the 50 GB cap with room to spare. The quality slider, not the clock, is what keeps you under the limit.
Typical data rates by activity
| Activity | Typical rate (GB/hour) | 2 h/day per month | Share of a 50 GB cap |
|---|---|---|---|
| Streaming video, SD (480p) | 0.7 | 42 GB | 84% |
| Streaming video, HD (1080p) | 3 | 180 GB | over cap |
| Streaming video, 4K (UHD) | 7 | 420 GB | over cap |
| Video call (HD) | 1.5 | 90 GB | over cap |
| Music streaming | 0.15 | 9 GB | 18% |
| Web and social media | 0.1 | 6 GB | 12% |
| Online gaming (play only) | 0.05 | 3 GB | 6% |
Rates are typical averages; actual usage varies with the provider, codec and quality setting. Game and app downloads are one-off events of tens of gigabytes each, not an hourly rate.
Frequently Asked Questions
How much data does streaming video use per hour?
It depends entirely on the resolution. Standard definition (480p) uses roughly 0.7 GB per hour, high definition (1080p) around 3 GB, and 4K ultra-high-definition near 7 GB per hour. That is a tenfold spread from lowest to highest quality, which is why the resolution setting matters far more than the number of hours when a data cap is tight. Most streaming apps let you cap the quality or switch to a data-saver mode, which is the single most effective way to cut usage.
How much data does a video call use?
An HD one-to-one video call uses around 1.5 GB per hour, though this varies by app and by how many people are on screen. Group calls with several video feeds can push past 2 to 3 GB per hour, while audio-only calls drop to a fraction of that, often under 0.1 GB per hour. If you are on a limited plan, turning your camera off or lowering the call quality cuts the data dramatically without ending the conversation.
Does online gaming use a lot of data?
Playing is surprisingly light: most online games use only about 0.05 to 0.15 GB per hour of actual play, because they exchange small position and action updates rather than video. The real data cost of gaming is the downloads. A single modern game can be 50 to 150 GB to install, and updates routinely run into tens of gigabytes, so a single download can equal months of play. Schedule game and console updates over Wi-Fi rather than a metered connection.
What is the difference between a data cap and throttling?
A hard data cap stops or charges you once you pass a set number of gigabytes: you either lose service or pay overage fees per gigabyte. Throttling instead slows your connection after a threshold, so you keep browsing but streaming and downloads crawl. Many mobile plans advertised as unlimited are actually throttled after a fair-use limit, often 20 to 50 GB. This calculator estimates the gigabytes you use so you can see when you would hit either kind of limit.
How can I make a limited data plan last longer?
Video is where the savings are. Set streaming apps to SD or a data-saver mode, which can cut usage by three-quarters versus HD. Download music, podcasts and shows over Wi-Fi for offline play rather than streaming them on mobile data. Turn off video auto-play in social apps, and schedule large app, game and system updates for Wi-Fi. Finally, check your phone's built-in data monitor to see which single app is the biggest consumer, it is almost always a video app.
Methodology and sources
This tool estimates monthly data use from an activity's hourly rate and your daily hours, then compares the total to your plan so you can see the share used and the safe hours per day.
- Method: Monthly usage in GB = data rate (GB per hour) × hours per day × 30 days. Share of cap = monthly usage ÷ cap. Maximum hours per day within the cap = cap ÷ (rate × 30).
- Standards and sources: The preset rates are typical published figures: streaming providers quote roughly 0.7 GB per hour for SD, 3 GB for HD and 7 GB for 4K, video calls around 1.5 GB per hour HD, and music streaming near 0.15 GB per hour. These are representative averages, not provider-specific guarantees.
- Assumptions and limits: Assumes a 30-day month and one activity at a time; add each activity or household member separately for a full total. Actual usage varies with the app, codec, resolution and network. Game, app and system downloads are one-off events of tens of gigabytes, not an hourly rate, so budget for them separately.
Reviewed and maintained by Rick Oosterling, a maker and developer who tracks real household data use across mobile and home plans. Last reviewed: June 2026. Rates are planning estimates; check your carrier's own data monitor for exact figures on your account.