Aurora Storage Calculator
Project the Aurora cluster volume in billed 10 GB increments, its I/O charges, and how much of the 128 TiB ceiling you use.
About Aurora Storage Calculator
Aurora bills the data actually in the cluster volume rather than a pre-provisioned disk, but it does so in 10 GB increments, so the effective bill always rounds up. I/O is metered separately on Aurora Standard: converting a steady requests-per-second rate into a monthly figure needs the 2,628,000 seconds in a 730-hour month, which is why a modest-looking 800 IO/s becomes over two billion billable requests a month. The storage and I/O rates are editable defaults for us-east-1 — confirm current Aurora prices with AWS for your region. The cluster volume no longer shrinks automatically after a large delete on older engine versions, so knowing the trajectory towards the 128 TiB ceiling — and the I/O bill that comes with it — is what tells you when to shard or archive.
Formula
Aurora Storage
billed volume = ceil(projected GB ÷ 10) × 10; I/O cost = I/O per second × 2,628,000 seconds ÷ 1,000,000 × price per million.
- projected GB
- Current volume plus growth over the planning window
- increment
- Aurora allocates and bills the volume in 10 GB steps
- 2,628,000
- Seconds in a 730-hour billing month
- 128 TiB
- Hard ceiling on a single Aurora cluster volume
Worked example
With the default values below, Aurora Storage Calculator returns Billed Cluster Volume of 1,120. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Cluster volume in use todayaccepts 0–131,072 GB
- 640 GB
- Growthaccepts 0–10,000 GB/month
- 40 GB/month
- Plan aheadaccepts 1–60 months
- 12 months
- Billing incrementaccepts 1–100 GB
- 10 GB
- Storage priceminimum 0 $/GB-month
- 0.1 $/GB-month
- Storage I/O requestsaccepts 0–2,000,000 IO/s
- 800 IO/s
- I/O priceminimum 0 $/million
- 0.2 $/million
Results
- Billed Cluster Volume
- 1,120 GB
- Projected Data Size
- 1,120 GB
- Projected Data Size
- 1 TiB
- Monthly Storage Cost
- $112.00
- Monthly I/O Cost
- $420.48
- Share of the 128 TiB Limit
- 0.85%
Step by step
- 1Values used
- 2Aurora Storage
- 3Billed Cluster Volume= 1,120 GB
- 4Projected Data Size= 1,120 GB
- 5Projected Data Size= 1,202,590,842,880
- 6Monthly Storage Cost= 112.00
- 7Monthly I/O Cost= 420.48
- 8Share of the 128 TiB Limit= 0.85
Assumptions and limits
- The result is derived only from the 7 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 Aurora Storage calculated?
billed volume = ceil(projected GB ÷ 10) × 10; I/O cost = I/O per second × 2,628,000 seconds ÷ 1,000,000 × price per million. Aurora bills the data actually in the cluster volume rather than a pre-provisioned disk, but it does so in 10 GB increments, so the effective bill always rounds up. I/O is metered separately on Aurora Standard: converting a steady requests-per-second rate into a monthly figure needs the 2,628,000 seconds in a 730-hour month, which is why a modest-looking 800 IO/s becomes over two billion billable requests a month. The storage and I/O rates are editable defaults for us-east-1 — confirm current Aurora prices with AWS for your region.
Why does Aurora Storage matter?
The cluster volume no longer shrinks automatically after a large delete on older engine versions, so knowing the trajectory towards the 128 TiB ceiling — and the I/O bill that comes with it — is what tells you when to shard or archive.
What values do I need to enter?
This calculator takes 7 inputs: Cluster volume in use today, Growth, Plan ahead, Billing increment, Storage price, Storage I/O requests, I/O price. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.
Does the Aurora volume shrink when I delete data?
Modern engine versions do reclaim space with dynamic resizing, but the reduction is asynchronous and never goes below the high-water mark within a maintenance window. Plan on the growth curve, not on the delete.