Know your upload size before starting any transfer. Tune resolution, frame rate, codec, and audio. Get clear totals, time estimates, and shareable exports fast.
Use bitrate + duration for estimates, or enter a known file size. Then add overhead, copies, and a safety margin to plan real-world transfers.
| Scenario | Video (Mbps) | Audio (kbps) | Duration | Overhead | Margin | Copies | Adjusted total (GB) | Time @ 25 Mbps, 85% (HH:MM:SS) |
|---|---|---|---|---|---|---|---|---|
| 1080p share | 8 | 128 | 00:10:00 | 3% | 5% | 1 | 0.6593 | 00:04:08 |
| 4K review cut | 20 | 320 | 01:30:00 | 2% | 10% | 1 | 15.3894 | 01:36:34 |
| Two destinations | 5 | 96 | 00:45:00 | 4% | 5% | 2 | 3.7563 | 00:23:34 |
Transfer size starts with total bitrate and play time. Add video Mbps to audio kbps/1000, multiply by 1,000,000 and seconds, then divide by eight for bytes. For example, 8 Mbps video plus 128 kbps audio equals 8.128 Mbps; over 10 minutes, raw size is about 0.6096 GB. If you prefer binary units, that is roughly 0.5676 GiB, which explains why operating systems may show a smaller number.
Real files include container metadata, headers, thumbnails, and small alignment padding. A 3% overhead and 5% margin together apply a 1.0815 multiplier per copy. That same 0.6096 GB becomes 0.6593 GB, matching the example table. Use 8–15% margin for variable bitrate edits, multi-pass exports, or when audio tracks can change. For archival masters, a small extra buffer helps when checksums and sidecar files are required.
Sending to multiple reviewers or regions multiplies totals. Two destinations double your adjusted bytes, so planning 2 copies of a 1.8782 GB per-copy package requires about 3.7563 GB. If you also upload a proxy version, treat it as another copy with its own bitrate and duration. This model makes it easy to compare “one high-quality upload” versus “two lighter uploads” and select the cheapest path.
Link rate is rarely the same as effective throughput. Apply an efficiency factor for protocol overhead, congestion, and encryption. At 25 Mbps with 85% efficiency, effective throughput is 21.25 Mbps. A 15.3894 GB delivery then takes roughly 01:36:34, helping teams schedule review windows and backups. If your speed is in MB/s, multiply by eight to convert to Mbps before applying efficiency.
Deadlines can be reversed into a required line speed. The calculator divides total bits by target seconds to get needed effective Mbps, then compensates for efficiency. If 3.0 GB must finish in 20 minutes at 80% efficiency, required line speed is about 25 Mbps. Use this to justify upgrades, choose a connection, or move large transfers to off-peak hours for consistent performance.
GB uses decimal 1,000,000,000 bytes; GiB uses binary 1,073,741,824 bytes. The calculator shows both so you can match cloud quotas and operating-system displays.
Use average bitrate for typical exports. If your content is highly variable, raise the safety margin to cover peaks, especially for action scenes, grain, or complex motion.
For most MP4/MKV deliveries, 1–4% is common. Use higher values when packaging includes captions, multiple audio tracks, thumbnails, or when extra metadata and sidecar files are required.
Shared networks, Wi‑Fi interference, server throttling, and retransmissions reduce effective throughput. Lower the efficiency value to reflect real conditions, or test a short upload to calibrate your typical percentage.
Yes. Set Copies to the number of destinations or repeated uploads. The calculator multiplies the adjusted per-copy size, helping you forecast storage and bandwidth for reviews, regions, or backups.
Enter Target completion time in minutes. The calculator computes the required line speed after accounting for efficiency, so you can see whether your connection can meet a deadline.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.