# Bandwidth Calculator

> Calculate download/upload time.

Page: https://askcalculators.com/calculator/bandwidth-calculator/
Definition: https://askcalculators.com/calculator/bandwidth-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/bandwidth-calculator/schema.json
Version: 7.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/bandwidth-calculator/?fileSize=1&speed=100

## Inputs
- fileSize: File Size (GB); type=number; optional; default=1
- speed: Internet Speed (Mbps); type=number; optional; default=100

## Outputs
- result: Result; format=text; primary

## Formula
Transfer time = file size in bits ÷ bandwidth in bits per second, with unit conversions.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.