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Data usage calculator

Estimate your monthly data usage from hours of activity per day.

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Enter Hours per day, Data rate (GB/hour), Days and the Data usage calculator works out Total data (GB) straight away. For instance, with Hours per day = 3, Data rate (GB/hour) = 1 and Days = 30 it returns Total data (GB) = 90.

How to use it

  1. Enter your values: Hours per day, Data rate (GB/hour), Days.
  2. Read the result instantly: Total data (GB).

Frequently asked questions

What does the Data usage calculator actually compute?

It takes Hours per day, Data rate (GB/hour) and Days and derives Total data (GB) from them. The calculation is live as you type, so the result updates on every change.

What information do I need to provide?

3 values: Hours per day, Data rate (GB/hour) and Days. Nothing else is required — no account, no file upload.

Can you show a worked example?

With Hours per day = 3, Data rate (GB/hour) = 1 and Days = 30, the calculator returns Total data (GB) = 90. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

What happens if I enter larger values?

It moves a lot. Using Hours per day = 6, Data rate (GB/hour) = 1.1 and Days = 60 instead, Total data (GB) goes from 90 to 396 — which is why it is worth testing a few scenarios rather than trusting a single figure.

What does it give for smaller values?

Scaled down to Hours per day = 1.5, Data rate (GB/hour) = 0.9 and Days = 15, Total data (GB) comes out at 20.25. The relationship is worth checking at both ends before you rely on a single result.

When would I actually use this?

Finding out how big a thing will be before you make it: how many gigabytes an hour of footage takes, how long a file needs on the connection you have, how large a photo prints before it goes soft, what bitrate fits the budget you were given.

What is the most common mistake?

Taking the advertised connection speed as the transfer speed. A 100 Mb/s line is megabits, the file is in megabytes, and the eight-fold difference between them is where most download estimates go wrong — before overhead and contention take their own share.

Is there a tool for the next step?

Video frame count calculator is the closest one after this: Compute how many frames a video contains from its duration and frame rate.

Where do the figures come from, and how current are they?

Byte prefixes follow the IEC convention where a kibibyte is 1 024 bytes and a kilobyte is 1 000 — drive makers use the second, operating systems often report the first, and a disk that shrinks on arrival is that gap and nothing else. Print sizing assumes 300 dpi unless you change it.

Further reading

All guides →
ExplainerHow Much Data Streaming Uses: SD, HD, and 4K per HourSee how many gigabytes per hour SD, HD, and 4K video use, and how to check a monthly streaming habit against a data cap.How-toHow Much Internet Speed Do You Need? A Household GuideWork out the internet speed your home needs by adding up Mbps per video stream, video call, and gamer, with clear examples.How-toHow Many Photos Fit on a Memory Card? Photos, Songs, and VideoEstimate how many photos, songs, or hours of video fit on a card by dividing its capacity by the average file size.ExplainerWhat an Availability Percentage Actually AllowsThree nines sounds like a promise until you divide it into minutes. What 99.9 % buys per year, per month, per week and per day; why the measurement window matters far more than the extra nine; and the two different months this tool uses for the same slug.ExplainerFrame Rates, Timecode, and the Drop-Frame That Drops NothingFrames = duration × rate is trivial until the rate is 29.97. Non-drop timecode then drifts exactly 3.6 seconds an hour. Drop-frame corrects it by skipping 108 frame numbers — the same 108 — but the correction is not perfect: counting every frame shows a residual of 3.6 milliseconds per hour.ExplainerHow Big Is That Audio File?Uncompressed audio size is exact arithmetic: sample rate × bit depth × channels × seconds ÷ 8. CD audio is 176,400 bytes per second. A 320 kbps MP3, by contrast, is bitrate × duration and does not depend on the sample rate at all — 2,400,000 bytes a minute whether it came from 44.1 or 48 kHz.