Streaming bitrate calculator
Measure your upload speed and get the exact OBS settings for Twitch, YouTube, and Kick: bitrate, encoder, keyframe interval, and audio. No guesswork.
1. Test your connection
Streaming is upload-bound. We measure your sustained upload using Cloudflare's speed-test SDK so the recommendations fit the line you actually have, not your marketed speed.
The speed test runs in your browser via Cloudflare's open-source speed-test SDK. Your browser connects directly to Cloudflare's test endpoints, so Cloudflare sees your IP address and basic browser information as part of normal network traffic (see Cloudflare's privacy policy). The measured result stays in your browser — nothing is sent to or stored by StreamDay. If you prefer not to use Cloudflare's network, skip the test and enter your upload speed manually.
Why getting bitrate right matters
The wrong bitrate setting is one of the most common causes of stream-quality complaints, and one of the easiest to fix. Push it too high and your viewers see buffering, dropped frames, and Twitch's “your stream may not transcode properly” warning. Set it too low and your content looks pixelated, especially during the high-motion moments where viewer attention is highest.
There's no single correct bitrate. The right number depends on three things: what your platform accepts (each has different ceilings and transcoding behaviour), what your upload bandwidth can sustain (not just the marketed speed, but the actual sustained throughput), and what your content motion demands (fast FPS games push more data than a chess stream).
That's what this calculator does. It measures your real upload speed, checks it against each platform's recommended ranges, applies the 50%-of-upload safety margin, and outputs the exact OBS settings that fit your setup: bitrate, encoder, keyframe interval, and audio. No more guessing whether 6,000 Kbps is too high for your line.
Want the deep technical explanation? Our streaming bitrate guide covers encoder choice (NVENC vs x264 vs AMF), audio bitrate, keyframe behaviour, and multistreaming considerations. If you're setting OBS up for the first time, the OBS beginner's guide walks through every panel from install to your first broadcast.
Frequently asked questions
What's the best bitrate for streaming on Twitch?
For 1080p60, which is Twitch's most common high-quality target, 4,500–6,000 Kbps is the practical range. Going above 6,000 Kbps risks losing Twitch's transcoding, which means viewers on slower connections will buffer. Our bitrate guide covers why this cap exists and how Partner-tier exceptions work.
Why does my stream drop frames at higher bitrates?
Dropped frames almost always mean your upload bandwidth can't sustain the bitrate you're pushing. As a safety margin, use no more than 50% of your measured upload for the stream itself. That leaves headroom for the rest of your household and incidental load. If you're still dropping, test on a wired Ethernet connection.
Is 6,000 Kbps enough for 1080p60?
For most content, yes. 6,000 Kbps at 1080p60 is the sweet spot Twitch, YouTube, and Kick all transcode reliably. High-motion content (fast FPS, racing) benefits from the upper end. Low-motion content (chess, art) can drop to 4,000–4,500 Kbps without visible quality loss.
What's the difference between CBR and VBR?
CBR (Constant Bitrate) keeps the stream's bitrate steady regardless of scene complexity. VBR ramps up during high-motion moments and drops during quieter ones. Streaming platforms expect CBR, because their transcoders and viewer-side players are tuned for it. Always use CBR for live streaming.
Why does Twitch cap bitrate at 6,000 Kbps?
Twitch transcodes incoming streams into multiple quality tiers so viewers on slower connections can still watch. Transcoding has a cost ceiling. Above 6,000 Kbps on standard ingest, Twitch is less likely to provide it, which means viewers without your full bandwidth see buffering instead of a lower quality. Partners and select streamers get a higher cap.
Do I need a hardware encoder like NVENC?
If you have an RTX 20-series GPU or newer, NVENC is usually the right choice. It offloads encoding from your CPU and matches x264 quality at the same bitrate. On RTX 40-series cards, NVENC AV1 is better still. Older GPU? x264 at the “veryfast” preset is a solid software baseline. Our OBS setup guide walks through the choice.
What keyframe interval should I use?
2 seconds. Every streaming platform expects this, whether Twitch, YouTube, or Kick. Anything else risks encoding errors, buffering at scene changes, and platform warnings. Set it once in OBS (Settings → Output → Streaming → Keyframe Interval) and don't touch it again.