Cloud Storage Cost Calculator
Estimate the true monthly and annual cost of object storage by adding storage, data-egress and API-request charges in one place.
Reviewed by the CalcCafe editorial team · Last updated 1 July 2026 · How we test our tools
Example
Storing 1,000 GB at $0.023/GB is $23.00 in storage. Add 100 GB of egress at $0.09/GB ($9.00) and 500 thousand requests at $0.005/1k ($2.50), and the total is $34.50 per month — about $414.00 per year.
How it works
Monthly cost = (stored GB × storage price) + (egress GB × egress price) + (requests in thousands × request price). The storage line is stored GB × price-per-GB, egress is download GB × price-per-GB, requests are thousands × price-per-1,000, and annual cost is simply the monthly total × 12.
Good to know
Cloud object storage looks cheap per gigabyte, but the sticker price on capacity is only one of three lines on the bill. This tool splits the estimate into the parts that actually move your invoice: the data you keep, the data you pull back out (egress), and the sheer number of API requests your app makes. Filling in each provider's list price lets you see where the money really goes before you commit to a bucket.
For most low-traffic archives, storage dominates and the total is trivial. The surprises come from egress and requests. Downloading data to the public internet — serving images, streaming backups off-cloud, or feeding a CDN origin — is often priced far higher per gigabyte than storing it, and many providers give away inbound transfer while charging steeply for outbound. Request charges, billed per thousand GET/PUT/LIST calls, stay invisible until a chatty application or a misconfigured sync loop turns millions of tiny operations into real dollars.
Use realistic monthly figures rather than one-time totals: average GB stored across the month, expected outbound transfer, and a rough request count from your logs or an estimate of reads and writes. Because every field is editable, the calculator doubles as a quick side-by-side: plug S3, R2, B2, or GCS pricing into the same boxes and compare the monthly and annual results.
Remember this is a planning estimate, not a quote. It ignores free-tier allowances, storage classes (standard vs infrequent-access vs archive), minimum storage durations, retrieval fees, cross-region replication, and taxes. Check your provider's current pricing page and calculator for a binding figure before you architect around a number.
Frequently asked questions
Why is egress often the biggest part of a cloud storage bill?
Storing data is usually cheap, but pulling it back out to the internet (egress) is priced much higher per GB by most providers. High-traffic downloads, video streaming, or a CDN origin can make egress dwarf your storage line, which is why it gets its own field here.
What counts as a request in this calculator?
A request is any API operation against your bucket — GET, PUT, POST, LIST and similar calls — billed per thousand. Enter your monthly request volume in thousands and the per-1,000 price your provider lists; chatty apps can rack up surprising request costs.
Is my data uploaded anywhere?
No — this calculator runs entirely in your browser. Your inputs never leave your device, and it works offline once loaded.
Is this calculator free?
Yes, completely free with no sign-up and no limits.
People also ask
How do I estimate my monthly cloud storage cost?
Add three parts: stored GB times the per-GB storage price, egress GB times the per-GB transfer price, and requests in thousands times the per-1,000 price. This tool sums them into a monthly total and multiplies by 12 for the annual figure.
How much does 1 TB of cloud storage cost per month?
At a common $0.023/GB, 1,000 GB is about $23 per month for storage alone — before egress and request charges. Cheaper archive tiers and providers like Backblaze or Cloudflare R2 can lower that; plug their prices in to compare.
Does cloud storage charge for uploads or downloads?
Most providers make inbound (upload) transfer free but bill outbound (download) egress per GB. That is why the egress field only asks for data leaving the provider; adjust it to match what your app actually serves out.
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Sources & references
These tools follow our methodology and provide educational estimates only — verify important figures with a qualified professional.