Video File Size: 2h 24m in GB

For a 2-hour 24-minute video, the file size in gigabytes (GB) ranges from roughly 0.9 GB (low-resolution, highly compressed) to over 10 GB (high-bitrate 4K footage). The exact number depends on resolution, frame rate, codec, and bitrate—not just duration. This article explains how to estimate the size for your specific video and why the range is so wide.

Formula

The core formula for video file size is:

File size (GB) = (Duration in minutes × 60 seconds × Bitrate in Mbps) / 8000

Where:

• Duration – total length of the video in minutes (e.g., 144 minutes for 2h 24m).
• Bitrate – average number of megabits processed per second (Mbps). This is the main driver of file size.
• 8000 – converts megabits to gigabytes (8 bits = 1 byte, 1000 bytes = 1 KB, 1000 KB = 1 MB, 1000 MB = 1 GB).

This formula gives the video stream size; audio adds a small amount (typically 0.1–0.5 GB for 2.5 hours).

Worked Example

Using the calculator defaults: a 144-minute video (2h 24m) with an average bitrate of 8 Mbps (common for 1080p on YouTube).

1. Convert duration to seconds: 144 min × 60 = 8,640 seconds.
2. Multiply by bitrate: 8,640 s × 8 Mbps = 69,120 megabits.
3. Convert to gigabytes: 69,120 / 8,000 = 8.64 GB.

So a typical 1080p video of 2h 24m at 8 Mbps is about 8.6 GB. If the bitrate is 4 Mbps (streaming quality), it drops to ~4.3 GB; at 35 Mbps (4K Blu-ray), it jumps to ~37.8 GB.

Why Bitrate Matters More Than Resolution

Bitrate is the amount of data used per second. Higher resolution and frame rate usually require higher bitrates to look good, but they don’t dictate size—the bitrate does. A 1080p video at 10 Mbps will be larger than a 4K video at 5 Mbps (though the 4K may look worse due to compression).

• Low bitrate (1–3 Mbps): 360p–720p, screen recordings, video calls. 2h24m ≈ 1–3 GB.
• Medium bitrate (5–10 Mbps): 1080p standard streaming. 2h24m ≈ 5–11 GB.
• High bitrate (20–50 Mbps): 4K, high-action sports, Blu-ray. 2h24m ≈ 22–54 GB.
• Extreme (100+ Mbps): Pro cameras, RAW video. 2h24m can exceed 100 GB.

Codec and Compression: H.264 vs H.265 vs AV1

The codec (compression algorithm) affects how much bitrate is needed for a given quality. H.264 (AVC) is the most common, but H.265 (HEVC) and AV1 can deliver the same quality at roughly half the bitrate. So a 2h24m video saved in H.265 might be 4.3 GB where H.264 would be 8.6 GB. Hardware support varies: H.265 is widely supported, AV1 is newer but increasingly common in web video.

How to Find the Bitrate of Your Video

If you have a file, you can check its bitrate without guesswork:

1. On Windows: right-click the file → Properties → Details tab → look for “Total bitrate�.
2. On macOS: open the file in QuickTime → Cmd+I → look for “Data Rate�.
3. On mobile: use a file info app like MediaInfo (free) or check the recording settings in your camera app.

Alternatively, divide the file size (in bytes) by the duration (in seconds) and multiply by 8 to get Mbps.

Common Misconceptions

• “Resolution equals file size� – Not true. A 4K video at low bitrate can be smaller than a 720p video at high bitrate.
• “All 2h24m videos are the same size� – No, the range is enormous, from under 1 GB to over 50 GB.
• “GB vs GiB� – This article uses decimal GB (1 GB = 1,000,000,000 bytes), as used by hard drive and streaming companies. Some operating systems show GiB (1 GiB = 1,073,741,824 bytes) and label it “GB�, making files appear ~7% larger.

Practical Tips for Estimating and Managing Size

• For a rough estimate, use the calculator above with a typical bitrate for your use case.
• If you’re uploading to YouTube, the recommended bitrate for 1080p is 8 Mbps, for 4K it’s 35–45 Mbps.
• To reduce file size, lower the bitrate or use a more modern codec (H.265/AV1).
• For storage, remember that a 2h24m movie at 1080p (8 Mbps) will occupy about 8.6 GB, so a 64 GB phone can hold roughly 7 such videos.

Frequently Asked Questions

How many GB is a 2 hour 24 minute movie on Netflix?

Netflix uses variable bitrate depending on quality. For 1080p, it’s typically 5–8 Mbps, so a 144-minute movie would be about 5.4–8.6 GB. For 4K, it can be 15–25 Mbps, leading to 16–27 GB.

Does frame rate (24fps vs 60fps) affect file size?

Yes, but only indirectly. Higher frame rates require more data per second to maintain the same quality, so bitrate usually increases. A 60fps video at the same bitrate as 24fps will have lower quality per frame, but the file size will be the same because bitrate is the same.

Why does my video file show a different size than the calculator?

The calculator gives the video stream size. The actual file includes audio (typically 0.1–0.5 GB for 2.5 hours) and container overhead. Also, variable bitrate (VBR) means the average bitrate may differ from the peak. Check the file’s properties for the exact average bitrate.

How can I make a 2h24m video smaller without losing much quality?

Re-encode it with a more efficient codec like H.265 or AV1, and use a slightly lower bitrate. For example, converting from H.264 8 Mbps to H.265 4 Mbps can halve the size while maintaining similar perceived quality. Use software like HandBrake (free) to do this.

Is there a standard bitrate for 1080p video?

No, but common recommendations are 8 Mbps for standard 30fps content, 12 Mbps for 60fps, and 35–45 Mbps for 4K. Streaming services use adaptive bitrates ranging from 1–8 Mbps for 1080p depending on connection speed.

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in t | Duration | min | 144 | 0
in b | Bitrate | Mbps | 8 | 0
out size | File size | GB | (t * 60 * b) / 8000 | 2