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Cloud Egress Cost Calculator

See your data transfer bill before it lands.

How it is calculated

Egress is billed per gigabyte leaving the cloud, so the tool multiplies the volume by a single rate: cost = data transferred (GB) × price per GB. It also shows the cost of a terabyte at that rate, price × 1000, treating 1 TB as 1,000 GB. This is a flat-rate calculation: it applies one price to every gigabyte, with no free monthly allowance and no volume tiers. If your provider gives some free gigabytes or a lower price at higher volumes, subtract the free amount first, or run each tier as a separate calculation and add the results. Data can be 0 or more, and the price cannot be negative. Amounts are in dollars, rounded to the cent, which hides very small per-GB prices in the per-TB line.

Worked example

You expect to send 2,500 GB to the internet in a month, at a price of 0.085 per GB. Cost: 2,500 × 0.085 = $212.50. Per terabyte at that price: 0.085 × 1,000 = $85.00. If the provider gives the first 100 GB free, subtract it before multiplying: 2,400 × 0.085 = 204.00, so the allowance saves 8.50.

Try this example →

Common mistakes

  • Typing the data in megabytes or terabytes. The box is in gigabytes, so 2 TB must be entered as 2000, not 2.
  • Entering the price per TB or per 1,000 GB in the per-GB box. A rate listed as 85 per TB is 0.085 per GB.
  • Counting all stored data instead of only the data that leaves. Storing data and uploading it usually cost nothing for egress, so only count what is downloaded or sent out.
  • Ignoring the free monthly allowance and the lower rates at higher volumes that many providers offer. This tool applies one flat price to everything, so it can overestimate.
  • Forgetting that traffic between regions or to another cloud can be billed at a different rate from traffic to the public internet. Use the rate that matches the path your data takes.

About this calculator

Cloud providers like AWS, Google Cloud, and Azure generally charge nothing for data flowing into their network (ingress), but bill for data flowing out to the public internet or across regions — this is egress. Egress cost is calculated as the volume of data transferred in gigabytes multiplied by the provider’s per-GB rate. Many providers apply tiered pricing, where a certain amount is free each month and the per-GB rate drops at higher volumes, but this calculator applies one flat rate to all the data.

DevOps engineers and cloud architects budget for egress specifically because it is one of the most common sources of surprise cloud bills — data-heavy applications like video streaming platforms, backup services, and APIs serving large payloads to many users can rack up egress charges that dwarf compute costs, and multi-region or multi-cloud architectures that move data between regions or providers incur egress fees that a single-region setup would avoid entirely.

Enter the gigabytes you expect to transfer and the per-GB price, and this calculator estimates your egress cost, plus the cost per terabyte, before the bill arrives. To account for a free allowance or cheaper tiers, enter only the billable gigabytes or an average per-GB price.

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