Data Usage Calculator
Estimate data consumption for browsing, streaming and downloads over a period.
About Data Usage Calculator
Data usage is derived by converting daily viewing/usage time into seconds, multiplying by the content's bitrate to get total megabits transferred, then converting to gigabytes (dividing by 8 for bits-to-bytes and by 1000 for MB-to-GB). Multiplying the daily figure by the number of days in the billing cycle gives the monthly total, which is the number that matters against a data cap.
Formula
Monthly usage
monthly_GB = (daily_hours × 3600 × bitrate_Mbps) / 8 / 1000 × days
- h_day
- Daily usage hours
- b_Mbps
- Average bitrate
- d
- Days per month
Worked example
With the default values below, Data Usage Calculator returns Monthly Data Usage of 202.5 GB/month. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Daily Usageaccepts 0–24 hours/day
- 3 hours/day
- Average Bitrateminimum 0.1 Mbps
- 5 Mbps
- Days per Monthaccepts 1–31
- 30
Results
- Monthly Data Usage
- 202.5 GB/month
- Daily Usage
- 6.75 GB
- Monthly Usage
- 202.5 GB
- Yearly Usage
- 2,463.8 GB
Step by step
- 1Values used
- 2Monthly usage
- 3Monthly Data Usage= 202.5 GB/month
- 4Daily Usage= 6.75 GB
- 5Monthly Usage= 202.5 GB
- 6Yearly Usage= 2,463.8 GB
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How much data does streaming video use?
It depends heavily on resolution and codec: standard definition typically runs 1-3 Mbps (~0.3-1 GB/hour), HD around 5 Mbps (~2.25 GB/hour), and 4K can reach 15-25 Mbps (~7-11 GB/hour). Enter your service's stated bitrate for an accurate estimate.
Why does my ISP's usage meter differ from this estimate?
This calculator assumes a constant average bitrate, but real streaming uses adaptive bitrate technology that varies with network conditions, and other background usage (updates, other devices) adds to the ISP's measured total.
How do I stay under a monthly data cap?
Lower the streaming quality setting to reduce bitrate, download content on Wi-Fi for offline viewing instead of streaming repeatedly, and use this calculator with your plan's cap as the target monthly figure to find a sustainable daily budget.