Synology Backup Bandwidth Calculator
Overview
Use this page to estimate bandwidth needs for Synology backup tasks, replication, and cloud archive operations.
This page is designed for Synology and NAS backup planning and links directly to the live calculator for quick planning.
How it works
Transfer planning uses a simple relationship: time = data size / speed. If you solve for speed, speed = data size / time.
- Bits vs bytes: 1 byte = 8 bits. Mbps and MB/s are not the same.
- Decimal vs binary units: MB/GB/TB differ from MiB/GiB/TiB.
- Real-world overhead: protocol efficiency, latency, congestion, and disk I/O reduce effective throughput.
Common examples
- Synology Hyper Backup overnight throughput target.
- Synology replication timing over remote links.
- NAS cloud backup capacity planning before growth.
FAQ
Is this estimate exact?
No. It is a planning estimate based on sustained throughput assumptions.
Does this work for upload and download?
Yes. Use measured upload speed for uploads and measured download speed for downloads.
Can I use this for cloud storage transfers?
Yes. It is useful for Google Drive, Dropbox, and S3 transfer planning.
Why is my ISP speed different from observed speed?
ISP rates are often theoretical maxima, while real throughput changes with network conditions.
Should I include safety margin?
Yes. Add margin when planning deadlines, especially for WAN or Wi-Fi links.
Where can I calculate exact values?
Use the main calculator to enter your values and units directly.