✳ FREE CALCULATOR
Upload time calculator
Estimate transfer time from a file size and a connection speed, with the megabit/megabyte confusion handled for you.
- Estimated upload time
- 1m 45s
- At 70% of the quoted speed
- 2m 30s
- Your speed in MB/s
- 2.50 MB/s
- File size in megabits
- 2097 Mb
Real throughput is usually below the advertised line rate.
Calculated as: seconds = file bytes × 8 ÷ (Mbps × 1,000,000)
What this assumes
- Connection speeds are quoted in megabits, file sizes in megabytes - a factor of eight apart.
- Ignores handshake, retries and the platform's own processing time after the transfer finishes.
Koldflux works these numbers out for you when it exports - the calculators exist because our own pipeline needed them first.
Automate this in Koldflux