# Cloud Storage Cost Calculator

> Estimate a monthly object-storage bill from GB stored with up to two price tiers, data transferred out, and read and write request charges.

Category: Software, cloud & AI · Applies to: Worldwide · Last updated: 2026-10-29
Interactive calculator: https://calculators.geekmidst.com/calculators/cloud-storage-monthly-cost-calculator

Object storage bills have three parts: GB-months stored, data transferred out (egress) and per-request charges. Enter your provider’s rates for each.

Also called: Object storage cost calculator, Blob storage cost calculator.

## Inputs
- Average data stored (unit GB; default 5000)
- First price tier covers (unit GB; default 1000; optional)
- Price per GB-month (first tier) (default 0.02)
- Price per GB-month above the first tier (default 0.015; optional)
- Data transferred out per month (unit GB; default 200; optional)
- Free egress allowance (unit GB; default 100; optional)
- Egress price per GB (default 0.09; optional)
- Write (PUT/POST/LIST) requests per month (default 1000000; optional)
- Price per 1,000 write requests (default 0.005; optional)
- Read (GET) requests per month (default 10000000; optional)
- Price per 10,000 read requests (default 0.004; optional)
- Currency

## Results
- Monthly cost
- Storage
- Egress
- Requests
- Annual cost

## Formula

```
Storage = min(GB, Tier) × P1 + max(0, GB − Tier) × P2;  Egress = max(0, Out − Free) × Egress price;  Requests = Writes ÷ 1,000 × Pw + Reads ÷ 10,000 × Pr
```

Where:
- GB: average GB stored over the month
- Tier: GB covered by the first price
- P1, P2: price per GB-month in each tier
- Pw, Pr: request prices

## Worked example
1. Storage: 1,000 × 0.02 + 4,000 × 0.015 = 20 + 60 = 80.
2. Egress: (200 − 100) × 0.09 = 9.
3. Requests: 1,000 × 0.005 + 1,000 × 0.004 = 9. Total 98.

**Result:** At these example rates, 5,000 GB with modest traffic costs about 98 a month.

## What the result means

Storage is usually the steady part of the bill; egress and requests swing with traffic. If egress dominates, a CDN or a provider with cheaper or free egress may cost less overall.

## Assumptions and limits
- The amount stored is the average across the month (a GB-month is 1 GB kept for a whole month).
- Tiers apply to the total stored, as on most graduated price lists.
- Minimum storage durations, retrieval fees for cold tiers, replication and taxes are not included.
- Some providers price per GiB while labelling it GB; check which your price list uses.

## Questions

### What is a GB-month?

One gigabyte stored for one month. 300 GB kept for 10 days of a 30-day month is about 100 GB-months.

### Is transfer into the cloud charged?

Ingress is often free, but egress to the internet and sometimes between regions is charged. Check your provider.

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Source: GM¹X CalcVerse — https://calculators.geekmidst.com/calculators/cloud-storage-monthly-cost-calculator