Transfer Time Calculator
Calculate transfer time from file size, connection speed, and efficiency while correctly handling bits, bytes, decimal units, and binary units.
Inputs
Results
- Estimated time
- 6 minutes 58 seconds
- Effective speed
- 90 Mbps
- Seconds
- 417.78
- Minutes
- 6.96
- Hours
- 0.12
- Days
- 0
Bit-based units such as Mbps are converted differently from byte-based units such as MB/s.
How transfer time is estimated
Use file size, transfer speed, and connection efficiency to estimate how long a download, upload, or local transfer may take.
Bits vs bytes
Connection speeds such as Mbps are bits per second, while units such as MB/s are bytes per second. The calculator converts file size to bits before estimating duration.
Efficiency
Real transfers often lose some throughput to protocol overhead, Wi-Fi conditions, server limits, or other traffic. The efficiency setting reduces the effective speed before the final estimate.
Common uses
- Estimate a large download before starting it.
- Compare upload times across internet plans.
- Plan a backup or file transfer window.
Calculation notes
The estimate is calculated locally; no file is selected or uploaded.
FAQ
Why is Mbps different from MB/s?
Mbps means megabits per second. MB/s means megabytes per second, and one byte is eight bits.
Why include efficiency?
It represents real-world overhead, so a 100 Mbps connection at 80% efficiency is estimated as 80 Mbps of useful throughput.
Does this measure my actual connection?
No. It estimates time from the values you enter and does not run a speed test.