Estimateur du coût de la bande passante en nuage
Guide
Estimateur du coût de la bande passante en nuage
This tool estimates how much you will pay each month for outbound internet egress on the major cloud providers, using current published list prices for AWS, Google Cloud, Azure, Cloudflare, DigitalOcean, and Backblaze B2. Enter your expected monthly transfer in GB, TB, or PB, pick the provider you currently use, and you will get a tier-by-tier cost breakdown plus a side-by-side comparison so you can see exactly how much you would save (or spend) by moving the same workload to a different cloud.
Comment utiliser
- Pick your current provider from the dropdown.
- Enter your monthly egress volume and choose the right unit (GB, TB, or PB).
- Optionally add an extra free allowance if your plan includes more bundled bandwidth than the provider’s standard free tier.
- Read the headline number for your monthly bill, the effective $/GB rate, and the annualized cost.
- Scroll down to see the full tier-by-tier breakdown and a chart comparing the same workload across all six providers.
Caractéristiques
- Six providers in one view – AWS, Google Cloud, Azure, Cloudflare R2/Workers, DigitalOcean, and Backblaze B2 priced from the same egress number.
- Real tiered pricing – uses each provider’s published volume tiers (first 10 TB, next 40 TB, etc.) instead of a flat rate.
- Free tier aware – subtracts the standard monthly free allowance and any extra bundled bandwidth before billing.
- Cross-provider chart – horizontal bar chart sorts cheapest-to-most-expensive so you can spot savings instantly.
- Effective rate & annualized total – shows your blended $/GB and what the bill looks like over a full year.
- No tracking, no signup – everything runs in your browser; no data leaves your machine.
FAQ
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What is cloud egress and why is it so expensive?
Egress is data leaving the cloud provider's network for the public internet (or another region). Most providers charge little or nothing for ingress and intra-region traffic but bill heavily for egress, partly to recoup peering and transit costs and partly as a strong incentive to keep workloads inside their ecosystem. This pricing model is the single biggest source of cloud bill surprises for image, video, and API-heavy workloads.
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Why does Cloudflare charge $0 for egress?
Cloudflare's R2 object storage, Workers, and Pages do not charge for egress at all. They can do this because Cloudflare has direct peering with most major ISPs through its CDN, so outbound traffic costs them very little. They make money on the storage and request side rather than per-GB bandwidth, which is why R2 has become a popular escape hatch from S3 egress fees.
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How accurate are these estimates?
The tool uses standard published list pricing for the US and EU regions on each provider's most common egress destination tier. Real bills can differ because of region-to-region transfer rates, private interconnect (DirectConnect, ExpressRoute, Cloud Interconnect), CDN offload, committed-use discounts, and enterprise volume agreements. Use the result as a planning estimate, not a bill prediction.
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What does the free allowance override do?
Some plans bundle extra bandwidth on top of the provider's published free tier. For example, a DigitalOcean droplet plan already includes 1 TB transfer per month, but if you have several droplets the bundled total can be much higher. Enter the additional GB here and the tool will subtract that from billable usage before applying tier rates.
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