Free Online Calculators

Bandwidth & Download Time Calculator

Calculate download time for files and estimate monthly data usage.

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Bandwidth vs Speed vs Throughput

Bandwidth is the maximum data transfer rate of a network connection, measured in Mbps or Gbps. Throughput is the actual data transferred under real conditions — usually lower than the advertised speed because of network overhead, congestion, and protocol inefficiencies.

Why is my internet speed slower than advertised?
Advertised speeds are usually maximums. Real speed depends on your plan, the time of day, Wi-Fi signal, how many devices share the connection, and protocol overhead, so the download time here is a best-case estimate.
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