---
title: Parallel Testing Calculator - TestingBot
description: Calculate the optimal number of parallel tests needed to achieve your
  desired build times across browsers and devices.
source_url:
  html: https://testingbot.com/support/parallel-calculator
  md: https://testingbot.com/support/parallel-calculator/index.md
---
# Parallel Testing Calculator

Parallel testing allows you to run multiple tests simultaneously across various browsers, devices, and OS combinations. This approach enables more tests to be run at once, significantly decreasing overall testing time. Faster build times mean faster releases and less time spent waiting for builds to complete.

Use this calculator to understand how parallel testing can help you achieve your test coverage and build execution time goals. Simply input your current testing setup and desired build time to calculate the optimal number of parallel tests needed.

| Team | Current State | Desired Future State | Recommendation |
| --- | --- | --- | --- |
| # of Browsers  
and/or Devices  
(Current) | # of Parallel  
Tests | Build Time  
(hours) | # of Browsers  
and/or Devices  
(Desired) | Build Speed |
| --- | --- | --- | --- | --- |
| Team 1 | | | | | 
Select...Supersonic (15m)Fast (30m)Basic (2h)Custom
 | - |
| + Add Team | Total Recommendation: - |

 Calculate Save & Share 

Use this URL to view & share these results:

 Copy 

## Understanding the Calculator

# of Browsers and/or DevicesThe number of unique desktop browser and/or mobile device combinations to test.

# of Parallel TestsThe number of parallel tests you are currently running.

Build TimeTime taken for your entire build to complete.