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articles/storage/blobs/blob-storage-estimate-costs.md

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> [!NOTE]
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> These calculations provide an approximate estimate given sample pricing. If blobs were uploaded in batches, then some portion of the storage costs would be prorated as they would not incur storage costs for the entire month. See [Data storage and index meters](../common/storage-plan-manage-costs.md#data-storage-and-index-meters).
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| Cost factor | January | February | March | April |
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|-------------------------------------------------------------------------------------------------------|-----------------|-----------------|-----------------|-----------------|
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| **Cost to write 1000 blobs to the hot tier**<sup>1 | **$3.53** | **$3.53** | **$3.53** | **$3.53** |
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| Number of blobs in the hot tier after monthly ingest | 1000 | 2000 | 2100 | 2155 |
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| Number of blobs to move to the cool tier | 0 | 1000 | 1050 | 1078 |
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| **Cost to set blobs to the cool tier (billed as a write operation)** | **$0.00** | **$0.01** | **$0.0105** | **$0.010775** |
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| Number of blobs in the cool tier | 0 | 1000 | 1050 | 1078 |
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| Total size of blobs in the cool tier (GB) | 0 | 5000 | 5250 | 5388 |
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| Number of blobs read from the cool tier then moved back to the hot tier | 0 | 100 | 105 | 108 |
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| **Cost to read blobs from the cool tier and then to move them to the hot tier (2 read operations per blob)** | **$0.00** | **$0.0002** | **$0.00021** | **$0.0002155** |
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| Number of blobs that remain in the cool tier | 0 | 900 | 945 | 970 |
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| Total size of blobs that remain in the cool tier (GB) | 0 | 4500 | 4725 | 4849 |
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| **Cost to store blobs in the cool tier** | **$0.00** | **$51.75** | **$54.34** | **$55.76** |
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| **Early deletion penalty** | **$0.00** | **$0.00** | **$0.00** | **$0.41** |
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| Number of blobs that remain in the hot tier | 1000 | 1100 | 1155 | 1185 |
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| Total size of blobs that remain in the hot tier (GB) | 5000 | 5500 | 5775 | 5926 |
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| **Cost to store blobs in hot tier** | **$104.00** | **$114.40** | **$120.12** | **$123.27** |
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| Number of blobs read from the hot tier | 500 | 550 | 578 | 593 |
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| **Cost to read blobs from the hot tier** | **$0.00022** | **$0.000242** | **$0.0002541** | **$0.00026076** |
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| **Monthly total** | **$107.53** | **$169.69** | **$178.00** | **$182.98** |
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| Cost factor | January | February | March | April |
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|-------------------------------------------------------------------------|--------------|---------------|----------------|-----------------|
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| **Cost to write 1000 blobs to the hot tier**<sup>1 | **$3.53** | **$3.53** | **$3.53** | **$3.53** |
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| Number of blobs in the hot tier after monthly ingest | 1000 | 2000 | 2100 | 2155 |
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| Number of blobs to move to the cool tier | 0 | 1000 | 1050 | 1078 |
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| **Cost to set blobs to the cool tier (billed as a write operation)** | **$0.00** | **$0.01** | **$0.0105** | **$0.010775** |
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| Number of blobs in the cool tier | 0 | 1000 | 1050 | 1078 |
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| Total size of blobs in the cool tier (GB) | 0 | 5000 | 5250 | 5388 |
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| Number of blobs read from the cool tier then moved back to the hot tier | 0 | 100 | 105 | 108 |
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| **Cost to read blobs from the cool tier** | **$0.00** | **$0.0001** | **$0.000105** | **$0.00010775** |
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| **Cost to move blobs back to the hot tier** | **$0.00** | **$0.0001** | **$0.000105** | **$0.00010775** |
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| Number of blobs that remain in the cool tier | 0 | 900 | 945 | 970 |
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| Total size of blobs that remain in the cool tier (GB) | 0 | 4500 | 4725 | 4849 |
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| **Cost to store blobs in the cool tier** | **$0.00** | **$51.75** | **$54.34** | **$55.76** |
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| **Early deletion penalty** | **$0.00** | **$0.00** | **$0.00** | **$0.41** |
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| Number of blobs that remain in the hot tier | 1000 | 1100 | 1155 | 1185 |
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| Total size of blobs that remain in the hot tier (GB) | 5000 | 5500 | 5775 | 5926 |
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| **Cost to store blobs in hot tier** | **$104.00** | **$114.40** | **$120.12** | **$123.27** |
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| Number of blobs read from the hot tier | 500 | 550 | 578 | 593 |
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| **Cost to read blobs from the hot tier** | **$0.00022** | **$0.000242** | **$0.0002541** | **$0.00026076** |
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| **Monthly total** | **$107.53** | **$169.69** | **$178.00** | **$182.98** |
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<sup>1</sup>The number of operations required to complete each monthly upload is **641,000**. The formula to calculate that number is 1000 blobs * 5 GB / 8-MiB block + the write operation that is required to assemble all of the blocks into a blob.<br />
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articles/storage/common/storage-plan-manage-costs.md

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#### Data storage and index meters
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Data storage and metadata are billed per GB on a monthly basis. Metadata is stored as part of the object and includes properties and key-value pairs. It does not include blob index tags as those are stored as a sub resource and have their own billing meter. Because the size of metadata does not exceed 8 KB in size, it's cost is relatively insignificant as a percent of total storage capacity.
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Data storage and metadata are billed per GB on a monthly basis. Most metadata is stored as part of the blob and includes properties and key-value pairs. The metadata that is associated with blobs in the archive tier is stored separately in the cold tier. That way, users can list the blob and its properties, metadata, and index tags. Because the size of metadata does not exceed 8 KB in size, it's cost is relatively insignificant as a percent of total storage capacity.
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The **Index** meter applies only to accounts that have a hierarchical namespace as a means to bill for the space required to facilitate a hierarchical file structure including the access control lists (ACLs) associated with objects in that structure.
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Blob index tags are stored as a sub resource in the hot tier, and have their own billing meter. The **Index** meter applies only to accounts that have a hierarchical namespace as a means to bill for the space required to facilitate a hierarchical file structure including the access control lists (ACLs) associated with objects in that structure. Data associated with the index is always stored in the hot tier.
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For data and metadata stored for less than a month, you can estimate the impact on your monthly bill by calculating the cost of each GB per day. The number of days in any given month varies. Therefore, to obtain the best approximation of your costs in a given month, make sure to divide the monthly cost by the number of days that occur in that month.
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