Bytes meet bits.
Files are measured in bytes; network speeds in bits per second. Multiply the file’s bytes by 8, then divide by the effective speed.
seconds = (bytes × 8) ÷ (bps × utilization / 100)FILE TRANSFER CALCULATOR
File transfer time,
without the guesswork.
Big download? Large upload? Find out how long your file
could take, before you start the transfer.
Set up your transfer
THE INPUTSYour time estimate
THEORETICALESTIMATED TRANSFER TIME
Effective speed
Bandwidth used
HERE’S THE MATH
( bytes × 8) ÷
bps = seconds
A little clarity is one click away.
Set your file size and speed,
then calculate your transfer time.
Duration rounded to 0.01 sec.
Seconds shown without rounding.
Just numbers. No files, no sign-up, no data sent.
How we protect your privacyBEHIND THE ESTIMATE
The math behind the wait.
Mind your units.
Decimal units use powers of 1,000. Binary units use powers of 1,024. A 1 GB file takes 80 seconds at 100 Mbps; 1 GiB takes 85.89934592 seconds.
Explore the unit referenceLeave a little headroom.
This is a theoretical estimate. Wi-Fi, network congestion, server limits, latency, and protocol overhead can all add time. Use lower utilization to model reduced bandwidth.
Use upload speed for uploads, download speed for downloads.