File Transfer Time Calculator
Estimate upload or download time from file size, connection speed, and an efficiency factor.
Internet plans are sold in Mbps (megabits). Download apps often show MB/s (megabytes): 1 MB/s = 8 Mbps.
Real connections usually reach 70 to 90% of the plan. Leave it empty for the full speed.
Your result
Enter the file size and the connection speed.
How to use it
- Enter the size and the speed.
- Choose the units and leave the efficiency or type it.
- Read the duration.
Examples
- 100 megabytes at 10 megabits100 MB, 10 Mbps, and efficiency 100. 80 seconds.
- Efficiency 80The same size and speed with efficiency 80. The time is 01:40, which is 100 seconds.
- A speed of zeroSpeed 0. A message asks for a speed above zero.
Tool details and privacy
The seconds are the bits divided by the speed after efficiency. Mbps is decimal megabits, and MBps is decimal megabytes.
An efficiency of 80 means 80% of the speed is used. Leave it empty and it counts as 100. Size and speed are whole numbers.
Options
- Size and speed are whole numbers. Efficiency is from 1 to 100. More than 100 days is rejected.
Limits
- It does not measure your network. The speed is a number you type.
- Mbps is not MB/s. The first is bits and the second is bytes.
Privacy
The numbers are calculated in your browser and are not sent to any server.
Questions
Why 80 seconds?
100 megabytes are 800 megabits, and at 10 megabits per second that is 80 seconds.
What does efficiency 80 do?
It makes the duration 100 seconds, which is 01:40.
Does it test the connection?
No. It does not send a file and it does not measure the speed.
Is MB/s the same as Mbps?
No. MB/s is bytes and Mbps is bits.