Data Usage Calculator
Estimate monthly internet data from streaming, gaming, browsing and downloads.
Last updated · View algorithm, constants and default inputs (JSON)
About this calculator
Plan monthly data use with editable activity amounts and illustrative rates. Actual usage varies by app, quality settings, compression, network conditions and device; treat the result as a rough estimate, not a provider bill forecast.
Worked example
calculated with the default values below
Streaming hours per day 3 hours · Streaming quality HD 1080p (1.5 GB/hr) · Music streaming hours per day 1 hours · Online gaming hours per day 1 hours · Video call hours per day 1 hours · Downloads per month 20 GB · Devices in the household 4 · Monthly data cap 1,000 GB Streaming data per month 135.0 GB · Everything else per month 111.5 GB · Total data per month 246.5 GB · Total data per day 8.22 GB · Share of your data cap 24.7 % · Cap status Within your cap, 754 GB spare · Largest data source Streaming video
General background references
Disclaimer
These calculators provide planning estimates only. Building codes, wiring regulations and safety requirements differ by country and change over time, and nothing here replaces a licensed professional or a permit. For structural, electrical or gas work, follow local code and have the installation inspected.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
T = 30(r_s H_s + 0.15H_m + 0.1H_g + 0.8H_c + 0.5N) + D_x
- T
- Monthly total (GB)
- r_s
- Video rate (GB/h: 0.7 SD, 1.5 HD, 7 UHD)
- H_s
- Streaming hours/day
- H_m
- Music hours/day
- H_g
- Gaming hours/day
- H_c
- Video-call hours/day
- N
- Connected devices (each)
- D_x
- Extra downloads (GB)
N devices adds 0.5 GB/day each; D_x extra downloads added in GB; daily = T÷30; percent of cap = 100T÷cap.
Frequently asked questions
Why does video streaming dominate my total monthly data use?
The model uses 0.7, 1.5 and 7 GB/hour for SD, HD and UHD video; 0.15 GB/hour for music; 0.1 for online gaming; 0.8 for video calls; and 0.5 GB per device per month for browsing, plus entered downloads. Daily hours are multiplied by 30. Defaults estimate 246.5 GB/month, including 135 GB of streaming. These are illustrative assumptions; real usage varies.