🧮 PERFTRACTOR

Performance Testing Calculators

Free performance testing calculators for JMeter, k6, Gatling, and LoadRunner: Little's Law virtual users, pacing, test data sizing, load generator capacity, and network bandwidth.

👥 Virtual Users Calculator (Little's Law)

Calculate the number of virtual users needed to hit your target load.

Transactions Per Second:

Average Response Time (seconds):

Think Time (seconds):

virtual users required

⌛ Pacing Calculator

Calculate the delay between iterations to hit your transactions-per-hour target.

Transactions Per Hour:

Number of Virtual Users:

seconds pacing required

🧪 Test Data Calculator

Estimate how many unique data records your test needs.

Number of Virtual Users:

Each VUser Iteration Duration (minutes):

Test Duration (hours):

test data records required

🔋 Load Generator Calculator

Work out how many virtual users each load generator can safely run.

Total LG RAM (MB):

First VUser Memory (MB):

Each Additional VUser Memory (MB):

OS RAM (typically 700-1024 MB):

virtual users per load generator

🌐 Network Bandwidth Calculator

Estimate the network throughput your test will consume.

Concurrent Users:

Transactions Per Second (per user):

Average Request Size (KB):

Average Response Size (KB):

Protocol Overhead (%):

Mbps required