Find out how long your initial cloud backup will actually take, using your real NBN upload speed, not the advertised download tier. Honest output in days and weeks, not marketing estimates.
This cloud backup time estimator calculates how long an initial or incremental backup will take to upload based on your data size, NBN connection type, and real-world upload speed. Accounts for AU NBN upload constraints, where your download tier does not determine upload speed, and outputs an honest timeline in days and weeks.
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| NBN Plan | Upload (Mbps) | Effective throughput | 5 TB backup (days) | 10 TB backup (days) |
|---|---|---|---|---|
| NBN 25/5 | 3–4 | ~0.35 MB/s | 120–160 | 240–320 |
| NBN 50/20 | 15–18 | ~1.6 MB/s | 27–36 | 54–72 |
| NBN 100/20 | 15–18 | ~1.6 MB/s | 27–36 | 54–72 |
| NBN 100/40 | 30–36 | ~3.2 MB/s | 14–18 | 28–36 |
| NBN 1000/50 | 38–45 | ~4.0 MB/s | 11–14 | 22–28 |
Assumes 75% efficiency and 24-hour daily upload window. ACCC Measuring Broadband Australia data used as reference for typical upload speeds.
This surprises most Australians. NBN tier names like "100/20" and "50/20" describe download/upload in Mbps. The first number is your download tier, the 100 or 50. The second number is your upload tier, in both cases, 20 Mbps.
This means upgrading from NBN 50/20 to NBN 100/20 will make your downloads faster but won't change your backup speed at all. For cloud backups, you need a plan with a higher upload number: NBN 100/40 gives you 40 Mbps upload, and NBN 1000/50 gives you 50 Mbps upload.
The reason is infrastructure: NBN was engineered with asymmetric speeds, optimised for streaming and downloads rather than uploads. FTTP (Fibre to the Premises) connections can often be upgraded to symmetrical speeds, but most residential services remain asymmetric. Check with your RSP if you're on FTTP, a symmetric plan may be available.