Streaming Bitrate Calculator

What a streaming bitrate is and why it decides everything

A bitrate is how much data per second your encoder sends to the platform. It is written in kilobits per second (kbps) or megabits per second (Mbps), and 1 Mbps equals 1000 kbps. One Mbps for one hour of video works out to 0.45 GB, so a 6 Mbps stream sends about 2.7 GB every hour you are live.

Three numbers decide how good your stream looks: the resolution (720p, 1080p, 1440p or 4K), the frame rate (30 or 60 frames per second), and the bitrate you feed the encoder. The bitrate is where the money goes. Raise it and the picture gets cleaner. Lower it and fast motion turns to mush, but your data bill and your upload line stay calm.

Live streaming and uploading a finished file are two different jobs with two different tables. A live stream has to arrive every second without stalling, so platforms set a ceiling. An uploaded file can take as long as it needs, so platforms suggest a bitrate that is high enough that the file still looks good after they compress it again.

You will also see the word ingest, which means the bitrate going from your computer to the platform. That is the number you set in OBS, Streamlabs or your camera's streaming menu. It is not the number your viewers download, since the platform makes several lower quality copies of your stream for viewers on slow connections.

The recommended bitrate for every resolution and frame rate

Twitch publishes exact encoder settings, down to the keyframe interval. For most people streaming on Twitch, the list is short.

Twitch also says to use a constant bitrate, a 2 second keyframe interval, and to stay under 6,000 kbps for a standard stream. The 2k 1440p option came with Enhanced Broadcasting in 2026 and is limited to Partners and Affiliates, so most channels should treat 1080p60 as the top of the ladder.

YouTube publishes two separate tables. The live encoder table gives a recommended range based on your ingest codec. The upload encoding table gives a target for the file you send up.

Both YouTube tables also ask for a 2 second keyframe frequency and constant bitrate encoding. The upload table adds a caution: encode and upload at the same frame rate you shot in, and deinterlace interlaced footage before it goes up.

How much upload speed you need to carry that bitrate

Your upload speed is the ceiling on everything else. Two rules cover most cases, and they come from different places.

Twitch publishes a simple rule for streamers: never set your broadcast bitrate above 80 percent of your consistent upload bandwidth. So the upload speed you need is your total bitrate divided by 0.8. A 6.128 Mbps stream wants 6.128 ÷ 0.8 = 7.66 Mbps of upload, and the remaining fifth of your line absorbs the network wobble that causes dropped frames.

For uploads and for YouTube live, a bigger cushion is the safer choice. The live streaming specifications published by the Lone Star College System recommend about 1.5 times your stream bitrate in available upload bandwidth, and give the example that a 5 Mbps stream wants at least 7.5 Mbps of upload.

Those two rules are close. 1.5 times gives you 50 percent headroom, while 80 percent of your upload gives you 25 percent. Pick one and be consistent, and test at the same time of day you normally broadcast, since evening traffic is what breaks streams.

For context, the Federal Communications Commission raised its fixed broadband benchmark in 2024 to 100 Mbps download with 20 Mbps upload, up from 25/3 Mbps set in 2015. A plan at that new 20 Mbps upload level handles a 1080p60 stream with room to spare, but it is not enough for a 4K60 YouTube live stream.

How much data a live stream burns every hour

The data math is the same for every platform. Take your total bitrate in Mbps, multiply by 0.45, and you get gigabytes per hour of streaming. The 0.45 comes from 3,600 seconds in an hour, 8 bits to the byte and 1,000 megabytes in a gigabyte.

Add your audio track to the video bitrate before you run the numbers. Twitch recommends 96 kbps of AAC-LC audio for the widest device support and allows up to 160 kbps, and YouTube asks for 128 kbps stereo on live streams. The calculator below uses 128 kbps by default and lets you change it.

Multiply the hourly figure by your own schedule to see the month. A creator who streams 10 hours a week for 4.33 weeks a month is on for 43.3 hours, so a 1080p60 Twitch stream at 2.7576 GB an hour costs 43.3 x 2.7576 = 119.4 GB a month of upload traffic.

None of this is the same as what a viewer downloads. The FCC's broadband speed guide puts HD streaming at 5 to 8 Mbps of download and 4K streaming at 25 Mbps. Your upload side is the part your internet plan sells you at a fraction of the download speed, so it is the part to check before you promise anyone 4K.

Worked example: a 1080p60 Twitch stream

Say you want to stream 1080p60 on Twitch and you stream about 10 hours a week. Here is the whole calculation, step by step.

Step one is the bitrate. Twitch lists 6,000 kbps for 1080p60, so your video track is 6,000 kbps. Add 128 kbps of audio and your total is 6,128 kbps, which is 6,128 ÷ 1000 = 6.128 Mbps.

Step two is the data. At 0.45 GB per hour for every Mbps, 6.128 x 0.45 = 2.76 GB an hour. Over a 10 hour week that is 27.6 GB, and over 43.3 hours in an average month it is 119.4 GB of traffic you push upstream.

Step three is the upload speed. Under the Twitch 80 percent rule you need 6.128 ÷ 0.8 = 7.66 Mbps. Under the more cautious 1.5x rule you want 6.128 x 1.5 = 9.19 Mbps. If your speed test shows 12 Mbps up, both rules pass with room left. If it shows 7 Mbps, step down to 720p60 at 4,500 kbps. With 128 kbps of audio the total is 4,628 kbps, which needs 5.79 Mbps under the 80 percent rule.

Step four is the encoder. Set rate control to constant bitrate, keyframe interval to 2 seconds, and audio to 128 kbps. Twitch allows a broadcast up to 48 hours long, and that is the one limit you cannot change.

Worked example: a 4K60 YouTube live stream

Now the expensive end. YouTube's live encoder table lists 35 Mbps for 2160p at 60 fps with H.264. Add 128 kbps of audio and the total is 35,128 kbps, or 35,128 ÷ 1000 = 35.128 Mbps.

The data cost is 35.128 x 0.45 = 15.81 GB for every hour you are on air. A 3 hour stream is about 47.4 GB pushed upstream in one sitting.

The upload speed is where most people stop. Under the 1.5x rule, 35.128 x 1.5 = 52.69 Mbps of upload. That is more than the FCC's 20 Mbps advanced broadband upload benchmark, so the average home cable plan cannot carry a 4K60 YouTube live stream without buffering. Fiber plans with 250 Mbps upload or more can.

Uploading a finished 4K60 file is a different job. YouTube's upload table lists 53 Mbps for 2160p at 48, 50 or 60 fps, and 35 Mbps at standard frame rates. At 53.128 Mbps total, that file carries 53.128 x 0.45 = 23.91 GB per hour of footage. The upload itself can take as long as it needs, so this is a storage and patience problem rather than a live quality problem.

The 2 second keyframe rule and constant bitrate setting still apply. So does the frame rate warning: encode and upload at the frame rate you shot in, or the picture will look like it judders.

Where these numbers come from

Every figure on this page traces back to a published source, and the two tables that matter most are maintained by the platforms themselves.

The Twitch Broadcasting Guidelines page on the Twitch Help site gives the encoder specs used above: 6,000 kbps for 1080p60, 4,500 kbps for 1080p30 and 720p60, 3,000 kbps for 720p30, constant bitrate, a 2 second keyframe interval, and 96 kbps of AAC-LC audio. The Twitch Guide to Broadcast Health page sets the 6,000 kbps ceiling for a standard stream. The Twitch 2k streaming article from 2026 supplies the 9,000 kbps figure for 1440p HEVC with Enhanced Broadcasting.

YouTube's live encoder settings page gives the recommended H.264 bitrates, the 2 second keyframe recommendation and the 128 kbps stereo audio bitrate. YouTube's recommended upload encoding settings page gives the upload table for standard dynamic range video, including the 35 to 45 Mbps and 53 to 68 Mbps ranges for 4K. The FCC Broadband Speed Guide from the Federal Communications Commission supplies the download side, with 5 to 8 Mbps for HD streaming and 25 Mbps for 4K. The Federal Communications Commission raised the fixed broadband benchmark to 100 Mbps download and 20 Mbps upload in its March 2024 annual assessment, FCC 24-27.

Platform guidance changes as codecs improve. Twitch raised its 2k bitrate in 2026 because HEVC needs fewer bits for the same picture, and YouTube keeps separate tables for AV1, H.265 and H.264. Check the current pages before you lock a setting, and treat the calculator as a starting point rather than a promise about how your stream will look.