For a continuous 24/7 stream running at a steady 1 Mbps for 30 days, plan for about 324 decimal GB of outgoing data, or about 302 GiB. That estimate is calculated from the stream bitrate and time; it does not include transport overhead, retransmissions or downtime.
To estimate a different stream, multiply its average outgoing bitrate in Mbps by its actual streaming hours and by 0.45. For a full 30 days online, the shortcut is average Mbps × 324. The examples below show how to choose the bitrate, convert units and make room for the difference between a calculation and a metered bill.
What this estimate counts
This is an estimate of the data your encoder sends towards YouTube, not the amount of data YouTube sends to viewers. A live encoder produces one incoming feed for the channel. YouTube processes that incoming stream into formats for playback; viewer numbers do not multiply the creator’s outgoing upload.
The calculation starts with a bitrate in bits per second and a period of time. It converts the bits sent into bytes, then expresses those bytes in decimal gigabytes. It is a useful planning baseline when you know the stream’s average rate and how long it will be online.
It is not a YouTube-published monthly usage figure, nor a promise about what your internet provider will record. The calculation treats the bitrate as constant and the stream as sending data throughout the stated time. Actual traffic may differ because of transport framing, retransmissions, variations in the rate, tests, concurrent feeds or interruptions.
It also does not estimate viewer-side data, the size of your uploaded source file, or unrelated activity on the same connection. Keep those separate when you are checking a household broadband allowance or a cloud host’s transfer billing. If other devices use the same internet connection, their traffic may appear on the same bill even though it is not part of the live stream estimate.
Calculate monthly decimal GB
The general formula is:
decimal GB ≈ average bitrate (Mbps) × streaming hours × 0.45
This is a rounded shortcut for converting megabits per second over time into decimal gigabytes. It assumes the bitrate is an average for the whole period, not a peak value. For a duration in seconds, use the underlying form instead:
GB ≈ Mbps × 1,000,000 × seconds ÷ 8 ÷ 1,000,000,000
The first conversion changes megabits per second into bits per second. Dividing by eight changes bits into bytes, and dividing by one billion expresses the result in decimal GB. The hours shortcut simply folds those conversions together for a duration expressed in hours.
For a 30-day month of uninterrupted streaming, there are 720 hours. Multiplying 720 by 0.45 gives 324, so the shortcut becomes:
30-day decimal GB ≈ average bitrate (Mbps) × 324
If your bitrate is listed in kilobits per second, divide it by 1,000 before using the formula. For example, a total average outgoing rate of 8,128 kbps is 8.128 Mbps. Do not mix Mbps and kbps in the same calculation: that would make the result wrong by a factor of 1,000.
The figures are approximate because the shortcut rounds the conversion factor. For a strict capacity or billing exercise, use the seconds-based formula with the actual number of seconds and confirm the billing unit with your provider.
Work through a 30-day stream
For a constant 1 Mbps stream, the 30-day calculation is 1 × 324, or approximately 324 decimal GB. For 6 Mbps, it is 6 × 324, or 1,944 GB. An 8 Mbps stream gives 2,592 GB, and 10 Mbps gives 3,240 GB. These are calculations for a steady rate over all 720 hours, before any excluded factors.
| Average outgoing bitrate | Approximate decimal data for 30 days | Approximate binary data for 30 days |
|---|---|---|
| 1 Mbps | 324 GB | 302 GiB |
| 6 Mbps | 1,944 GB (1.94 TB) | 1,811 GiB (1.77 TiB) |
| 8 Mbps | 2,592 GB (2.59 TB) | 2,415 GiB (2.36 TiB) |
| 10 Mbps | 3,240 GB (3.24 TB) | 3,019 GiB (2.95 TiB) |
| 14 Mbps | 4,536 GB (4.54 TB) | 4,226 GiB (4.13 TiB) |
The table is arithmetic, not a list of guaranteed outputs from an encoder. The 8 Mbps and 14 Mbps examples align with YouTube’s listed H.264 recommendations for 720p at 30 fps and 1080p at 30 fps respectively. YouTube’s live encoder settings are configuration guidance by codec, resolution and frame rate; they do not tell you what your particular FFmpeg command sends over an entire month.
For a shorter schedule, use the number of hours you expect to stream rather than the 30-day multiplier. At 8 Mbps for 12 hours, for example, the calculation is 8 × 12 × 0.45, or about 43.2 decimal GB before overhead and other excluded factors. If the stream is paused for planned maintenance, count only the hours it is actually sending.
Keep GB and GiB distinct
Internet providers and data plans commonly describe allowances using decimal units: one GB is 1,000,000,000 bytes, and one TB is 1,000 GB. A computer or monitoring tool may instead show binary units: one GiB is 1,073,741,824 bytes, while one TiB is 1,024 GiB. The names are similar, but the unit sizes are not identical.
To convert decimal GB to GiB, multiply by 1,000,000,000 and divide by 1,073,741,824. For a quick approximation, decimal GB × 0.931 gives GiB. In the other direction, multiply GiB by about 1.074 to get decimal GB. That is why the 324 GB estimate for 1 Mbps appears as about 302 GiB in the table.
Check the unit on both sides before comparing a calculated number with a plan allowance. If a monitoring dashboard reports GiB and a broadband plan lists decimal GB, comparing the two numbers directly makes the usage look slightly smaller than it is in the plan’s unit. A provider may also round usage or apply its own measurement period, so use the provider’s own description when a cap or bill is involved.
Terabytes follow the same distinction. Decimal 1 TB contains 1,000 GB, whereas 1 TiB contains 1,024 GiB. The table shows both labels where a monthly total is large enough to make the difference easier to see. Avoid dropping the “i” when copying a binary reading from a monitoring tool into a worksheet.
Choose an average bitrate, not just a peak
The rate that matters is the total outgoing feed from the encoder. If your FFmpeg settings state a constant bitrate for a complete multiplexed output, it can be a practical planning input. If the number describes video alone, add the audio rate before estimating. For example, 8 Mbps of video plus 128 Kbps of audio is approximately 8.128 Mbps before protocol overhead.
YouTube’s encoder guidance recommends settings that vary with codec, resolution and frame rate. Its page also specifies a 128 Kbps audio recommendation for stereo and discusses constant bitrate and keyframe settings. Those values are useful when configuring a stream, but a recommendation is not a measurement of the data your connection sends. For the exact feed, inspect the output settings and, if possible, compare them with a representative measurement.
With a variable-rate stream, a peak or target bitrate may overstate typical use, while a low-rate moment may understate it. Use a representative average of total outgoing traffic over a period that includes the content patterns you expect: for a music loop, include both quieter and busier sections; for a news loop, include graphics, clips and transitions. A short test may miss those changes.
Resolution alone cannot settle the estimate. Codec, frame rate, audio and bitrate choices affect the outgoing rate, so the same resolution can have different data use. If you are preparing a playlist with image holds or transitions, consider the encoded output rather than assuming every source file will use data at its original file bitrate; the stream is what travels upstream. The guide to streaming an FFmpeg playlist with a static image between videos is relevant when those transitions are part of the broadcast.
Add practical allowance for traffic outside the formula
The baseline intentionally leaves out transport overhead and retransmissions. Network protocols add information around the audio and video payload, and a congested or unstable path may need to send some data again. The official guidance does not provide a universal overhead percentage for every stream and connection, so adding an invented fixed margin would create false precision.
YouTube advises leaving additional upload capacity beyond the stream’s bitrate. Its streaming tips describe a 20% recommendation as room for upload bandwidth. That is a connection-capacity check, not an automatic 20% increase to the bytes in this monthly payload estimate. A connection that only just matches the stream rate has little room for normal variation, even if the arithmetic says the nominal transfer fits a monthly allowance.
A concurrently transmitted backup feed is different: it sends additional data and should be estimated separately. If a primary and backup stream both run at 8 Mbps for the same 30 days, calculate each stream’s usage and add them. If the backup is merely configured but not transmitting, do not count it as a second continuous stream. Testing, reconnect attempts, brief rate changes and other traffic on the host can also make measured transfer exceed the simple table.
Downtime reduces the time spent sending the nominal stream, so use actual streaming hours if there are known pauses or outages. This calculation does not predict interruptions or claim a particular uptime. For a schedule with pauses, calculate each live interval separately or subtract non-streaming hours from the month before applying the hours formula.
If a connection issue keeps ending a long-running broadcast, diagnosing it may matter more than revising the monthly estimate. The troubleshooting guide on why a 24/7 music stream can keep ending after several hours can help you distinguish a stream interruption from a steady transfer calculation.
Match the estimate to your allowance
Start with the provider’s billing unit and period. Note whether the allowance is decimal GB or TB, whether it covers a calendar month or a rolling period, and whether uploads count towards it. Then estimate the stream and any other traffic on that connection. For a capped connection, a prudent budget margin is sensible because this formula excludes several real-world sources of transfer and does not know how the provider rounds.
For a cloud host, check the host’s own definition of outbound transfer and the billing period before relying on a number. Some providers may treat transfer units or included allowances differently. Any vendor fact such as a price or plan limit should be checked on the vendor’s current site before you commit; this article does not assume a specific plan, tariff or cap.
It is useful to keep a simple record during a representative run: note the encoder’s average outgoing bitrate, the hours actually live, whether audio is included in that bitrate, and any simultaneous backup. Compare the calculated amount with the usage reading from the connection or host over the same interval. This will not make a future month identical, but it can reveal whether your chosen average is too low or whether other traffic is significant.
If you are deciding between a local computer and a cloud-based approach, include the data path in the comparison. A home connection may have an upload cap or variable upload capacity, while a hosted setup may have separate transfer rules. A guide to running a 24/7 YouTube stream with a Google Cloud VM is useful for examining that alternative, but verify current cloud charges and transfer terms directly with the provider.
For an always-on file-based stream, the ongoing job of keeping a computer awake and recovering after a dropped broadcast can become its own operational burden. StreamNeo removes that particular need to keep your own computer running for an uploaded-file stream, though it does not change YouTube’s encoding guidance or the need to understand any applicable data allowance.
Before committing, compare the operating options on the pricing page. When the file and channel are ready, start free — 24-hour trial, no card.
FAQ
How much data does a 24/7 livestream use per month?
At a constant 1 Mbps for 30 days, the calculation is about 324 decimal GB, or 302 GiB. Multiply the stream’s average outgoing Mbps by 324 for a 30-day estimate, then account separately for excluded factors and other traffic.
How many GB does an 8 Mbps stream use in a month?
At a steady 8 Mbps for all 720 hours, it is about 2,592 decimal GB, or 2.59 TB. The corresponding binary figure is about 2,415 GiB; both are calculated estimates, not YouTube-published usage values.
Does YouTube’s 20% upload headroom increase monthly data use?
No, it is guidance about having more upload capacity available than the stream requires, rather than an instruction to add 20% to the monthly payload calculation. A second feed that actually transmits at the same time does add transfer and should be counted separately.
Should I use peak or average bitrate?
Use a representative average of the complete outgoing stream, including audio if the stated video bitrate leaves it out. A peak describes a high point rather than typical use, while a nominal target may not match the encoder’s actual average.