Free Video Bitrate Calculator — Find the Perfect Bitrate & File Size

Enter your resolution, frame rate, and quality to instantly get the recommended bitrate (Mbps) and estimated file size. No sign-up needed.

Resolution

Frame Rate (fps)

Quality Preset

Duration

min

sec

Recommended Bitrate

4.35 Mbps

Estimated File Size

163.3 MB

Bitrate is calculated as width × height × fps × quality factor. Actual file sizes may vary depending on codec (H.264, H.265, VP9) and content complexity.

What Is Video Bitrate and Why Does It Matter?

Video bitrate is the amount of data encoded per second of video, typically measured in megabits per second (Mbps) or kilobits per second (Kbps). It's one of the most important settings when exporting, streaming, or uploading video because it directly controls the trade-off between visual quality and file size.

A bitrate that's too low results in compression artifacts — blocky gradients, blurry motion, and banding. A bitrate that's too high wastes storage and bandwidth without a noticeable quality improvement. The goal is to find the sweet spot where quality is excellent and file size stays manageable.

The optimal bitrate depends on three factors: resolution (more pixels need more data), frame rate (more frames per second require proportionally more data), and content complexity (fast motion or high detail needs a higher bits-per-pixel value). Our calculator handles all three with a single quality preset.

How It Works

Choose resolution

Pick your target resolution — 720p, 1080p, 1440p, 4K, or 8K. Higher resolutions need more data per frame.

Set frame rate & duration

Select the frame rate (24–120 fps) and enter video length. More frames per second means proportionally more data.

Pick a quality preset

Choose Low, Medium, High, or Ultra. Each preset sets a bits-per-pixel factor that controls visual fidelity.

Read the results

The recommended bitrate and estimated file size update in real-time as you adjust any setting.

When to Use a Video Bitrate Calculator

Uploading to YouTube, Vimeo, or TikTok — platforms re-encode your video, so uploading at the right bitrate ensures the best quality after compression.
Live streaming on Twitch or OBS — knowing your target bitrate prevents dropped frames and buffering for viewers on slower connections.
Exporting screen recordings — screen content (text, UI elements) benefits from higher bitrates at lower resolutions to stay crisp.
Archiving footage — when storage matters, calculating file size upfront helps you plan disk space for long recordings.
Encoding for mobile delivery — smaller file sizes with acceptable quality are essential for apps and mobile web where bandwidth is limited.

Frequently Asked Questions

What is video bitrate?

Video bitrate is the number of bits processed per second during playback, usually measured in Mbps (megabits per second). A higher bitrate means more data per frame, which typically produces better visual quality — but also larger files.

What bitrate should I use for 1080p video?

For 1080p at 30 fps, 8–12 Mbps is a solid starting point for H.264. If you're using H.265 (HEVC), you can drop that by about 30–40% and still get comparable quality. For 60 fps content, increase the bitrate by roughly 50%.

What bitrate does YouTube recommend for 4K uploads?

YouTube recommends 35–45 Mbps for 4K SDR at 24–30 fps, and 53–68 Mbps for 4K at 48–60 fps. For HDR content, they recommend 44–56 Mbps at 30 fps and 66–85 Mbps at 60 fps. Uploading at or above these values gives YouTube the best source for re-encoding.

How does frame rate affect bitrate?

Higher frame rates require more data because there are more frames to encode each second. Doubling the frame rate from 30 to 60 fps doesn't exactly double the bitrate (modern codecs use inter-frame compression), but you should expect a 40–60% increase for the same visual quality.

What's the difference between CBR and VBR?

CBR (Constant Bitrate) maintains the same bitrate throughout the video — good for streaming where consistent bandwidth matters. VBR (Variable Bitrate) allocates more data to complex scenes and less to simple ones, producing better quality at the same average file size. VBR is generally preferred for file-based exports.

Can a high bitrate cause playback issues?

Yes. Excessively high bitrates can cause buffering during streaming on slower connections, and produce files too large for some platforms' upload limits. Our calculator helps you find the right balance so quality stays high without creating unnecessarily large files.

How do I calculate video file size from bitrate?

Multiply the bitrate (in Mbps) by the duration (in seconds), then divide by 8 to convert bits to bytes. For example: 10 Mbps × 60 seconds = 600 megabits ÷ 8 = 75 MB. This calculator does the math for you automatically.

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Resolution	Standard (SDR)	High Quality
720p (1280×720)	2.5 – 5 Mbps	5 – 8 Mbps
1080p (1920×1080)	5 – 10 Mbps	10 – 20 Mbps
1440p (2560×1440)	10 – 20 Mbps	20 – 35 Mbps
4K (3840×2160)	20 – 40 Mbps	40 – 80 Mbps
8K (7680×4320)	80 – 150 Mbps	150 – 300 Mbps