Bandwidth Cost Calculator
Estimate monthly and annual data transfer costs.
Results update as you type.
How it works
A bandwidth cost calculator estimates what serving data over the internet will cost, from the gigabytes transferred each month and the price charged per gigabyte. This charge, often called egress or data-transfer cost, is one of the most significant and frequently underestimated line items in cloud and content-delivery bills, because it grows directly with how popular and data-heavy a service becomes. The estimate matters because bandwidth costs can dominate a budget as traffic scales. A site serving large images, video, or downloads can rack up substantial egress fees, and cloud providers typically charge a premium for data leaving their network. Seeing the monthly and annual figures helps you decide whether to add a content delivery network, optimise asset sizes, negotiate committed pricing, or choose a provider with more generous transfer allowances. The calculation is linear: multiply gigabytes transferred by the per-gigabyte price for the monthly cost, then by twelve for the annual figure at steady traffic. Real pricing often uses tiers where the rate drops as volume rises, and many providers include a free allowance before charging, so treat this as a straightforward baseline. Compression, caching, and CDNs can cut billable egress considerably. Developers, site operators, and finance teams use a bandwidth cost calculator to forecast transfer spend and find opportunities to reduce it.
monthly cost = gigabytes transferred × price per GB
Data transfer, or egress, is billed per gigabyte moved, so the monthly cost is simply the gigabytes transferred multiplied by the per-gigabyte price. Multiplying that monthly figure by twelve gives the annual cost, assuming steady traffic. The model works because bandwidth pricing is linear in volume: each additional gigabyte served adds the same fixed charge, so scaling traffic scales the bill in direct proportion with no fixed base in this simple estimate.
Source:Standard cloud pricing model
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Worked example
How to use this calculator
- 1
Enter your values
Enter monthly data transfer and price per gb.
- 2
Adjust the options
Fine-tune any options to match your situation.
- 3
Read your result
Monthly cost updates instantly as you type — no button to press.
Frequently asked questions
What is egress and why is it charged?
Egress is data leaving a provider's network, typically toward the internet or another region. Providers charge for it because moving data out consumes their network capacity and interconnection agreements have real costs. Inbound data, or ingress, is often free, while egress is billed per gigabyte. This asymmetry surprises many teams, since a service that receives little but serves a lot of data can face a large and steadily growing bandwidth bill.
How can I reduce bandwidth costs?
Use a content delivery network to cache and serve assets from edge locations, which is often cheaper than direct egress and reduces load on your origin. Compress text and optimise images and video to shrink the bytes sent. Enable browser caching so returning visitors re-download less. Avoid unnecessary cross-region transfers. For steady high volume, committed-use or reserved bandwidth pricing can lower the per-gigabyte rate substantially compared with on-demand.
Does the price per GB stay constant?
Often not. Many providers use tiered pricing where the per-gigabyte rate falls as monthly volume climbs, and most include a free allowance before any charge applies. Rates also vary by region and destination. This calculator uses a single flat rate for a clear baseline, so for large or tiered usage, check your provider's exact schedule and enter a blended or marginal rate that reflects the tier your traffic actually falls into.
Why estimate annual as well as monthly cost?
Monthly figures can look small and easy to dismiss, but bandwidth is a recurring cost that compounds over a year into a meaningful sum. Seeing the annual total puts the expense in the context of a budget cycle and makes the return on optimisation clear: a change that saves a modest amount each month becomes a substantial annual saving. It also helps when comparing providers whose pricing you are evaluating over a longer horizon.
Is CDN bandwidth cheaper than cloud egress?
Frequently, yes. Content delivery networks are built to serve large volumes of data efficiently and often price egress below cloud providers' standard rates, sometimes with better committed-use discounts. A CDN also offloads traffic from your origin, cutting the egress you pay there. The exact saving depends on your traffic pattern and the providers involved, so compare the per-gigabyte CDN rate against direct egress using this calculator for your expected volume.