Free · Everyday · Networking

Bandwidth Calculator

Estimate file-transfer time from file size, link speed, and protocol efficiency.

  • Checked formula
  • Private in your browser
  • No signup
Calculator inputs

Enter your values

Result

Your calculation

Estimated transfer time
0:15:41.176
Effective throughput
85 Mb/s
Data transferred
80 Gb

Real transfers also depend on latency, server speed, contention, retransmission, and whether units are decimal or binary.

How to use this calculator

  1. Enter the values and choose the units that match your situation.
  2. Calculate to see the primary answer and useful conversions.
  3. Review the assumptions before using the result for a project or decision.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.