Azure Blob Storage Calculator
Model Blob Storage across hot, cool and archive tiers with operation charges and archive rehydration costs.
About Azure Blob Storage Calculator
Blob Storage charges capacity, operations and retrieval on separate meters, and the tiers trade one against the other: archive is roughly 18× cheaper per GiB than hot but its write and read operations cost far more and reading anything at all requires a paid rehydration first. The blended cost per TiB shows what the mix really costs once operations are included. Lifecycle policies that push cold data to archive can backfire when an audit reads it back, so comparing the capacity saving against the rehydration and operation charges is the only way to know whether tiering pays — confirm the current per-GiB and per-operation prices for your region and redundancy in the Azure pricing calculator.
Formula
Azure Blob Storage
monthly = Σ(tier GiB × tier price) + (write ops ÷ 10,000 × write price) + (read ops ÷ 10,000 × read price) + rehydrated GiB × retrieval price.
- tier price
- Per-GiB monthly capacity rate for hot, cool or archive
- write price
- Charge per 10,000 write operations, highest on the cool and archive tiers
- retrieval price
- Per-GiB charge to rehydrate archive blobs back to an online tier
Worked example
With the default values below, Azure Blob Storage Calculator returns Monthly Cost of $400.98. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Hot tier dataaccepts 0–100,000 TiB
- 5 TiB
- Cool tier dataaccepts 0–100,000 TiB
- 20 TiB
- Archive tier dataaccepts 0–100,000 TiB
- 50 TiB
- Hot price per GiBaccepts 0–5 USD/GiB-month
- 0.0184 USD/GiB-month
- Cool price per GiBaccepts 0–5 USD/GiB-month
- 0.01 USD/GiB-month
- Archive price per GiBaccepts 0–5 USD/GiB-month
- 0.00099 USD/GiB-month
- Write operationsaccepts 0–100,000,000 thousands/month
- 4,000 thousands/month
- Write price per 10,000 operationsaccepts 0–5 USD
- 0.055 USD
- Read operationsaccepts 0–100,000,000 thousands/month
- 20,000 thousands/month
- Read price per 10,000 operationsaccepts 0–5 USD
- 0.0044 USD
- Archive data rehydratedaccepts 0–100,000 TiB
- 1 TiB
- Rehydration price per GiBaccepts 0–5 USD/GiB
- 0.02 USD/GiB
Results
- Monthly Cost
- $400.98
- Capacity Charge
- $349.70
- Operation Charge
- $30.80
- Rehydration Charge
- $20.48
- Total Capacity
- 75 TiB
- Blended Cost per TiB
- $5.35
Step by step
- 1Values used
- 2Azure Blob Storage
- 3Monthly Cost= 400.98
- 4Capacity Charge= 349.70
- 5Operation Charge= 30.80
- 6Rehydration Charge= 20.48
- 7Total Capacity= 82,463,372,083,200
- 8Blended Cost per TiB= 5.35
Assumptions and limits
- The result is derived only from the 12 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Azure Blob Storage calculated?
monthly = Σ(tier GiB × tier price) + (write ops ÷ 10,000 × write price) + (read ops ÷ 10,000 × read price) + rehydrated GiB × retrieval price. Blob Storage charges capacity, operations and retrieval on separate meters, and the tiers trade one against the other: archive is roughly 18× cheaper per GiB than hot but its write and read operations cost far more and reading anything at all requires a paid rehydration first. The blended cost per TiB shows what the mix really costs once operations are included.
Why does Azure Blob Storage matter?
Lifecycle policies that push cold data to archive can backfire when an audit reads it back, so comparing the capacity saving against the rehydration and operation charges is the only way to know whether tiering pays — confirm the current per-GiB and per-operation prices for your region and redundancy in the Azure pricing calculator.
What values do I need to enter?
This calculator takes 12 inputs: Hot tier data, Cool tier data, Archive tier data, Hot price per GiB, Cool price per GiB, Archive price per GiB, Write operations, Write price per 10,000 operations, Read operations, Read price per 10,000 operations, Archive data rehydrated, Rehydration price per GiB. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.