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nQuery - Powering Sample Size

In 2017, 90% of organizations with FDA approved clinical trials used nQuery for Sample Size calculation.

Reducing the risk & cost of clinical trials, for innovative organizations such as:
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Receive Regulatory Approval

Consistently calculate the correct sample size for FDA/EMA Submission

  • Validated Sample Size Tables & Procedures
  • Sample Size Statement Generator
  • Automated Installation & Operational Qualification (IQ/OQ) Procedures
More About Regulatory Approval >
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Reduce The Risk & Cost of Trials

Bayesian & Adaptive techniques to optimize your trial design

  • See how likely it is to receive a 'positive' outcome from your trial through the Bayesian module in our sample size & power analysis calculator
  • Reduce Sample Size while still ensuring results are statistically significant
  • Non-standard test statistics for mid-trial Adaptive modifications
More About Reducing Risk And Cost >

Powerful Sample Size Options

Use our sample size calculator to rapidly calculate sample size for a multitude of scenarios

  • Sample size calculator with 100’s of sample size and power calculation procedures
  • With Plotting Features, easily conduct a variety of “What-If” scenarios to align your final sample size choice with your scientific and budgetary requirements
  • Fine tune calculations with the Specify Multiple Factors tool
More Sample Size Calculator Options >
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Share & Empower

Easily communicate calculations to your team

  • Share your work quickly
  • Fast and useful reporting tools
  • A sample size calculator that empowers your team
More On A Sample Size Calculator For Teams >

Easy & Intuitive To Use

Clean and fast spreadsheet style interface with no coding required

  • Clean spreadsheet style interface
  • Zero manual coding
  • Statistical help cards
  • Customized tables
See How Easy nQuery Is To Use >
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