Backup Window Calculator
Checks whether a backup will finish in the time you have.
Full backup time
—
Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
Incremental backup time —
Fits the window? —
Throughput for a full backup to fit — MB/s
The formula
time = data ÷ compression ratio ÷ throughput
Incremental time assumes it sends only the changed share. Catalogue updates and file scanning add time when there are many small files.
What to watch out for
Run a test to measure throughput, because rated speeds are rarely sustained. Restores can run at a different speed, so time one of those too.
Frequently Asked Questions
How long do 10 TB take at 200 MB/s?
13 h 53 min 20 s for a full backup.
What throughput gets 10 TB done in 8 hours?
347 MB/s.