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IOPS Calculator

Estimate required IOPS, throughput, daily IO volume, and read/write mix from workload assumptions.

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Inputs

ops/sec
ops/sec
x

Your values stay on this device.

Results

Required IOPS
Throughput58.59
Read Mix80.00%
Daily IO Count216,000,000

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Assumptions

  • Read/write rates are steady-state averages.
  • Latency is not predicted from hardware behavior.
  • No workload telemetry is stored.

Sensitivity preview

Read Ops -10%: Required IOPS 3,450

Read Ops Current: Required IOPS 3,750

Read Ops +10%: Required IOPS 4,050

Formula: Required IOPS = (read ops/sec + write ops/sec) * peak multiplier. Throughput MB/sec = (read ops * read KB + write ops * write KB) / 1024 * peak multiplier.

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About this IOPS Calculator

Storage sizing needs both capacity and performance. IOPS measures operations per second, while throughput depends on IO size and read/write volume.

Who this calculator is for

  • DBAs sizing database storage.
  • Cloud engineers choosing disk tiers.
  • Infrastructure teams planning storage performance.

When to use it

  • Estimate peak IOPS.
  • Convert IO size into throughput.
  • Compare read/write mixes for storage tiers.

How to use this calculator

  1. Enter baseline read and write operations per second.
  2. Set average read and write IO size.
  3. Apply a peak multiplier for bursts.
  4. Review required IOPS and throughput.

Key assumptions

  • Read/write rates are steady-state averages.
  • Latency is not predicted from hardware behavior.
  • No workload telemetry is stored.

Accuracy and testing

Review formula sources, default test cases, assumptions, unit handling, rounding rules, and changelog for this calculator.

View accuracy page

How this calculator works

Required IOPS = (read ops/sec + write ops/sec) x peak multiplier. Throughput MB/sec = read ops x read KB + write ops x write KB divided by 1024, also scaled by peak multiplier.
Required IOPS = (read ops/sec + write ops/sec) * peak multiplier. Throughput MB/sec = (read ops * read KB + write ops * write KB) / 1024 * peak multiplier.

Inputs explained

Read and write ops

Baseline operations per second before burst allowance.

IO size

Average data transferred per read or write operation.

Peak multiplier

Planning multiplier for bursts, maintenance, or headroom.

Understanding your results

Use required IOPS and throughput together. A workload may be limited by either operation count or MB/sec.

Example scenarios

Database disk

2,000 reads/sec and 500 writes/sec with 16 KB average IO and 1.5x peak multiplier needs 3,750 IOPS and about 59 MB/sec.

Key Features

  • Instant Calculation
  • Private & Secure
  • Mobile Optimized

Tips & Best Practices

  • Measure real workloads where possible.
  • Check both IOPS and throughput limits for cloud disks.
  • Leave headroom for maintenance windows and checkpoints.

Frequently Asked Questions

Is higher IOPS always better?
Not necessarily. Throughput, latency, queue depth, cost, and workload pattern also matter.
Does this model latency?
No. It estimates required IOPS and throughput, not storage latency under contention.
Is any infrastructure data stored?
No. The calculation runs locally in your browser and does not upload your inputs.