Backblaze B2 Calculator

Estimate your monthly Backblaze B2 cloud storage cost with adjustable storage, download, and API transaction assumptions. This interactive calculator is designed for teams comparing backup budgets, archive projects, media libraries, analytics datasets, and application storage workloads.

Interactive cost calculator

Enter your average monthly usage. The default pricing assumptions reflect a common B2 estimate: storage at $0.006 per GB-month, downloads at $0.01 per GB, Class A transactions at $0.004 per 1,000, and Class B transactions at $0.004 per 10,000. If your contract or use case differs, adjust the assumptions in your planning process.

Estimated monthly result

This calculator is for planning and education. Always confirm the latest commercial terms directly with Backblaze before final budgeting or procurement.

Expert guide to using a Backblaze B2 calculator effectively

A Backblaze B2 calculator helps you translate raw storage activity into a practical monthly budget. That matters because cloud storage costs are rarely driven by a single number. Most teams think only about capacity, but real usage usually includes at least three cost drivers: how much data you store, how often you pull it back out, and how many application requests are required to serve users or keep backup software running. If you use a calculator correctly, it becomes more than a quick estimate. It becomes a planning tool for architecture, data retention, and long range forecasting.

Backblaze B2 is often discussed in the same conversation as Amazon S3, Azure Blob Storage, and Google Cloud Storage because all four can handle backups, archives, and object storage workloads. The reason B2 attracts attention is straightforward: its list pricing is often easier to understand and, in many common cases, materially lower on raw storage cost. A calculator lets you see whether that pricing advantage holds for your own pattern of reads, writes, and retention.

What a Backblaze B2 calculator actually measures

The simplest calculator multiplies average stored gigabytes by a storage rate. That is useful, but it is not enough for realistic decision making. A stronger model also includes bandwidth and request activity. Here is the practical breakdown:

• Storage cost: the amount of data kept in B2 over the month, commonly expressed as GB-month.
• Download or egress cost: the amount of data retrieved from the platform and sent elsewhere.
• API transaction cost: request volume generated by your software, users, lifecycle jobs, or integrations.
• Growth rate: an assumption about how quickly stored data increases over time.
• Retention pattern: whether data is overwritten frequently, versioned, or archived for long periods.

If your organization handles backups, surveillance video, media assets, machine learning datasets, or long term compliance archives, each of those variables can move in different directions. For example, a media company may store many terabytes but download selectively. A consumer application might store less total data yet create substantial request volume because users constantly browse and fetch files. A good calculator helps you separate those cost components.

Why storage planning should include risk and resilience, not only price

Cloud storage budgeting is not just an accounting exercise. It intersects with backup resilience, disaster recovery, and cyber defense. The U.S. Cybersecurity and Infrastructure Security Agency recommends maintaining offline or otherwise isolated backups as part of ransomware resilience planning. You can review CISA guidance at cisa.gov. Likewise, the National Institute of Standards and Technology publishes recovery and contingency planning guidance, including NIST SP 800-34 Rev. 1. These resources are directly relevant because a storage platform is part of an operational continuity strategy, not merely a line item.

If your business is evaluating B2 for backups, your calculator should estimate not only your steady state monthly footprint but also your recovery month. In a real incident, outbound traffic can spike dramatically because large restores may be required. A cost estimate that looks low during calm operations can become incomplete if it ignores emergency retrieval behavior.

Provider	Typical published storage list price	Approximate cost for 100 TB per month	Relative multiple vs B2
Backblaze B2	$0.006 per GB-month	$614.40	1.0x
Amazon S3 Standard	$0.023 per GB-month	$2,355.20	3.8x
Google Cloud Storage Standard	$0.020 per GB-month	$2,048.00	3.3x
Azure Blob Hot LRS	$0.0184 per GB-month	$1,884.16	3.1x

The table above uses common public list price references for standard hot object storage tiers and converts 100 TB to 102,400 GB. Actual invoices depend on region, operations, data transfer rules, and negotiated agreements. Still, the arithmetic shows why people search for a Backblaze B2 calculator in the first place. For capacity heavy, moderate access workloads, the storage component alone can differ by thousands of dollars per month.

How to estimate your usage with more accuracy

To improve the quality of any estimate, start with data you already have. Look at the last three to six months of backup reports, NAS growth logs, media asset systems, or object storage metrics. Instead of entering your highest ever number, create a working average and a high growth scenario.

1. Measure average stored data, not only endpoint capacity. If your source systems total 80 TB but deduplication or compression reduces the protected footprint to 52 TB, use the stored figure for the calculator.
2. Estimate monthly downloads separately from uploads. Backup workloads often write data continuously but restore infrequently. Media streaming or distribution patterns may reverse that logic.
3. Review application behavior. Listing files, checking metadata, or syncing versions can generate significant transaction counts even when bandwidth is modest.
4. Account for versioning and retention. If you keep multiple object versions, deleted data may remain billable until lifecycle rules remove it.
5. Model growth. If your data grows 5 percent per month, next quarter will not look like this quarter.

One of the biggest mistakes in storage budgeting is assuming the current month is representative forever. In many environments, data growth is steady and relentless. Research and higher education groups often add new datasets continuously, while security video and content repositories expand as retention windows lengthen. If your data set grows from 100 TB to 150 TB within a year, a low price per gigabyte still leads to a meaningful budget increase. A calculator should therefore be used repeatedly, not once.

Backblaze B2 use cases where calculators are especially valuable

• Backup repositories: Veeam, MSP backup stores, endpoint backup collections, and disaster recovery copies.
• Archive storage: legal records, long term research data, historical media, and log retention.
• Media workflows: video proxies, finished deliverables, and collaborative asset libraries.
• SaaS application storage: user uploads, static content, and downloadable assets.
• Hybrid cloud data protection: keeping a cloud copy of on premises NAS or server data.

Each use case stresses different pricing dimensions. Backup repositories are usually storage heavy and read light, unless restores are frequent. Media workflows can be both storage heavy and download heavy. SaaS application storage may generate more transaction activity than a simple archive. The calculator on this page is built to make those tradeoffs visible.

Important planning point: if your organization expects occasional large scale restores, include a worst month estimate in addition to a normal month estimate. Recovery events can shift outbound and request costs sharply.

Comparing monthly and annual impact

Decision makers often react to monthly cloud pricing, but annual totals are what affect operating budgets. Here is a practical example for three scenarios using the same $0.006 per GB-month baseline storage estimate.

Scenario	Average stored data	Estimated monthly storage cost	Estimated annual storage cost	Notes
Small business backup	20 TB	$122.88	$1,474.56	Good fit for offsite backup and retention copies.
Mid market archive	100 TB	$614.40	$7,372.80	Large enough that growth tracking becomes essential.
Media or analytics repository	500 TB	$3,072.00	$36,864.00	Bandwidth planning becomes as important as capacity.

Those annual figures are useful because they put storage decisions into context. A team that saves $1,700 per month versus a more expensive competitor is not just saving on invoice line items. It may be preserving budget for networking, security tooling, endpoint protection, or a second backup copy. That broader perspective is important when presenting recommendations to finance or operations leadership.

How transaction costs affect real world workloads

Many users underestimate transaction pricing because request charges look tiny at first glance. In isolation, they often are. Yet software that repeatedly scans, lists, verifies, or synchronizes large object sets can generate millions of operations. At that point, the request line item is still usually smaller than storage, but it is no longer invisible.

Think about a backup application that checks metadata and object states many times each day. Or a file synchronization platform that serves thousands of users searching and listing directories. In those scenarios, the request count can scale much faster than the stored terabytes. A Backblaze B2 calculator that includes Class A and Class B operations gives you a more realistic estimate than one based only on raw gigabytes.

What data governance and compliance teams should consider

Cost is only one part of choosing cloud object storage. Governance and compliance requirements can influence your final architecture. The National Archives and Records Administration publishes federal records management resources at archives.gov, and NIST cloud guidance is also worth reviewing at nist.gov. These sources are useful if your organization needs stronger policies around retention, recovery, and lifecycle management.

For compliance sensitive sectors, the calculator should be paired with policy questions such as:

• How long must each dataset be retained?
• Will legal hold or versioning increase billable storage?
• How frequently do we need to verify recoverability?
• What encryption, audit, and access controls are required?
• Do we need cross region or multi copy resilience beyond a single bucket design?

These questions matter because they influence both cost and architecture. Retaining more versions increases storage. Frequent validation restores increase bandwidth. More granular access controls can add operational overhead. A calculator should therefore be used in the context of governance requirements, not independently from them.

Best practices for building a more realistic Backblaze B2 estimate

1. Create three scenarios: baseline, growth, and recovery month.
2. Separate production from archive: hot application data often behaves differently from long term backup copies.
3. Review restore frequency: a cheap storage platform can still see higher monthly bills if restores are common and large.
4. Watch request patterns: integration design influences API counts.
5. Recalculate quarterly: storage programs evolve, and your estimate should evolve with them.

In practice, the most useful calculator output is not a single number. It is a cost profile. You want to know how much of your projected spend comes from retention, how much from egress, and how much from transaction volume. That clarity helps engineers optimize architecture. If storage dominates, focus on lifecycle and deduplication. If downloads dominate, review caching, CDN strategy, or restore workflows. If requests dominate, review software polling behavior and object listing patterns.

Final takeaway

A Backblaze B2 calculator is valuable because it turns a broad pricing page into a workload specific estimate. That is especially useful for IT teams, MSPs, creative agencies, research environments, and SaaS operators who need object storage that remains financially predictable as data grows. Used properly, a calculator helps with vendor comparison, budget forecasting, recovery planning, and architecture decisions.

The interactive tool above gives you a strong starting point. Enter your current usage, test a growth scenario, and then run a high restore month. If the storage cost remains favorable under all three conditions, you will have a more defensible basis for evaluating Backblaze B2 in your environment.