What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Estimate a video’s media size by multiplying its average combined audio-and-video bitrate by its runtime in seconds, then dividing by 8 to convert bits to bytes:
Estimated size in bytes = combined bitrate (bits/second) × runtime (seconds) ÷ 8.
For a useful estimate, include audio bitrate, use average rather than peak bitrate for variable-bitrate video, and label the result as decimal MB or binary MiB. The calculation is approximate, not a promise of the exact uploaded file size.
Calculate the estimated file size
- Find the average combined bitrate. Use a combined audio-and-video figure if available. If you only have separate rates, add the video bitrate and audio bitrate first.
- Convert the runtime to seconds. Multiply minutes by 60 or hours by 3,600.
- Multiply bitrate by seconds, then divide by 8. This produces bytes because a byte contains 8 bits.
- Convert bytes into the unit you want. Divide by 1,000,000 for decimal megabytes (MB), or by 1,048,576 for mebibytes (MiB). State which unit you use.
In symbols: bytes = bitrate in bits per second × duration in seconds ÷ 8. For decimal MB, divide that answer by 1,000,000; for MiB, divide by 1,048,576. File managers and other tools do not always label decimal and binary units consistently.
Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errors#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Worked example: a 10-minute 1080p SDR video
YouTube’s upload guidance recommends 8 Mbps for 1080p SDR at standard frame rates (24, 25, or 30 fps), and 384 kbps for stereo audio. Using those recommendations as an example:
- Add the rates: 8 Mbps + 0.384 Mbps = 8.384 Mbps, or 8,384,000 bits per second.
- Convert 10 minutes to seconds: 10 × 60 = 600 seconds.
- Calculate bytes: 8,384,000 × 600 ÷ 8 = 628,800,000 bytes.
- Convert the result: 628.8 MB (decimal), or about 599.8 MiB (binary).
This is an illustration based on YouTube’s recommended upload rates, not a claim that every 10-minute 1080p upload will have that size. The recommendations are settings guidance; the actual uploaded file size is a separate property.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Use the right bitrate for your video
Combine video and audio rates
If the bitrate you have is for video only, add the audio bitrate to estimate the complete audio-and-video file. For example, 8 Mbps of video plus 384 kbps of audio is 8.384 Mbps combined. If you already have a combined rate, do not add audio a second time. YouTube’s Data API distinguishes audio and video stream bitrates from the combined bitrate of the uploaded file.
Use average bitrate for variable-bitrate encoding
With variable-bitrate encoding, the data rate changes over the course of the video. Use a representative average combined bitrate for the estimate, not a peak bitrate: a peak describes a high point, not the typical rate across the full runtime. If you do not know the average, the result can only be a rough estimate.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Keep runtime units consistent
The formula requires seconds. Multiply minutes by 60 and hours by 3,600 before calculating. YouTube’s API represents duration in milliseconds, so convert it to seconds by dividing milliseconds by 1,000 if that is the duration value you are using.
YouTube bitrate recommendations are not file-size guarantees
YouTube recommends MP4, H.264 video, AAC-LC, Opus, or Eclipsa Audio, and variable bitrate for uploads. Its guidance says no bitrate limit is required and presents its bitrate figures as recommendations. For SDR video, the table lists these video bitrates:
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
| Resolution | Standard frame rates | High frame rates |
|---|---|---|
| 720p | 5 Mbps | 7.5 Mbps |
| 1080p | 8 Mbps | 12 Mbps |
| 2160p (4K) | 35–45 Mbps | 53–68 Mbps |
The same guidance lists 384 kbps for stereo audio. The video rates are not the combined audio-and-video rate, so add audio when estimating the whole file. These recommendations are not required settings, exact-size predictions, or descriptions of every playback rendition YouTube creates.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why the estimate can differ from the uploaded file
- Bitrate may vary. The calculation assumes the average rate you supplied represents the full runtime.
- Audio may be missing from the input. A video-only bitrate underestimates the complete file unless you add the audio rate.
- Container structures and metadata add data. The simple calculation estimates media data from bitrate and duration; it does not separately account for container and metadata overhead.
- Units may differ. Decimal MB and binary MiB are different quantities, even when tools use similar-looking labels.
- Uploaded file size is not playback-rendition size. The formula estimates the file from its bitrate and duration. It does not predict the sizes of versions YouTube may create for playback.
YouTube’s Data API documents the uploaded file’s size in bytes, duration in milliseconds, video and audio stream bitrates, and combined bitrate as distinct file properties. If you need the exact size of a particular upload, check the file itself or its recorded uploaded size rather than treating the estimate as exact.
Recommended Free Tools
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Or let it run in the cloud
If your goal is to keep a YouTube channel live 24/7 using uploaded videos, StreamNeo runs the loop in the cloud: upload your video or build a playlist, add your YouTube stream key, and go live. Nothing has to stay on at home. StreamNeo streams your uploaded video as made, up to 4K 60fps, at one price per slot rather than quality tiers; it automatically recovers if YouTube drops the stream. The first day is free with no card.
Monthly: $9.99 per month. See StreamNeo or pricing for details, then start your free day.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
