---
title: "Bandwidth Calculator — File Download/Upload Time by Connection Speed"
description: "Calculate download and upload time for any file size at any connection speed. Explains the Mbps vs MB/s confusion. Compare internet speeds globally. Free, no ads."
url: "https://worldcalculators.org/calculators/bandwidth/"
canonical: "https://worldcalculators.org/calculators/bandwidth/"
---

# Bandwidth Calculator

Calculate download and upload time for any file size at any connection speed. Explains the Mbps vs MB/s confusion. Compare internet speeds globally. Free, no ads.

## Quick answer

1 GB file on 100 Mbps = ~89 seconds. 10 GB on 1 Gbps fibre = ~89 seconds. 100 Mbps / 8 = 12.5 MB/s — ISPs sell bits, apps report bytes.

## Frequently Asked Questions

Real network traffic includes headers, error-checking, and acknowledgement packets beyond your raw data. TCP/IP adds about 3-5% overhead. Wi-Fi adds another 5-10% due to framing and collision avoidance. HTTPS encryption adds minimal overhead. Using 10% as a rule of thumb gives a realistic estimate for actual transfer speeds.
Data caps limit monthly data usage. In the US, many ISPs cap residential service at 1-1.2 TB/month. In Europe, most fibre plans are unlimited. Australia NBN plans often have data allowances of 200GB-500GB, though unlimited plans are common. Mobile data caps vary widely — Indian plans offer cheap 1.5-2GB/day, while US carriers charge premiums for unlimited.

Source: https://worldcalculators.org/calculators/bandwidth/
Markdown mirror of the HTML page. Prefer this URL for RAG; the interactive calculator still lives on the HTML page.