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In 2017, 90% of organizations with FDA approved clinical trials used nQuery for sample size calculation

See how nQuery can help you

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50k Users
Commercial, academic &
government organizations

Successful Trials
Recognized by the FDA, EMA
& other regulatory bodies

nQuery - Powering Sample Size

Leading through statistical innovation for over 20 years - nQuery is the worlds most trusted Sample Size and Power Analysis software

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Recieve Regulatory Approval

Consistently calculate the appropriate sample size for FDA/EMA submission
 
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Reduce Risk & Cost of Clinical Trials

Frequentist & Bayesian techniques to optimize your clinical trial design
 
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powerful sample size options

Powerful Sample Size Options

Rapidly calculate sample size and conduct power analysis 
 
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Share & Empower Your Team

Easily calculate and then communicate the findings to your team and non statisticians
 
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Intuitive Sample Size & Power Calculator

Calculate sample size and conduct a power analysis with a clean & easy to use interface
 
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Get A Trial

Try out our new cloud-based online Trial of nQuery, no download required
 
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I have been a user of nQuery software since the late 90's for sample size calculations in clinical trials.

For the last 14 years nQuery has been a standard product in our toolkit.

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As a CRO, our clients already know and thrust nQuery.

We use it to quickly calculate for a range of scenarios and trial designs.

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My research work into a rare disease resulted in quite a small sample size.

I needed to ensure that my study was adequately powered. nQuery provides that.

researchBanner

I have been a user of nQuery software since the late 90's for sample size calculations in clinical trials.

For the last 14 years nQuery has been a standard product in our toolkit.

pharmaBanner

As a CRO, our clients already know and thrust nQuery.

We use it to quickly calculate for a range of scenarios and trial designs.

croBanner

My research work into a rare disease resulted in quite a small sample size.

I needed to ensure that my study was adequately powered. nQuery provides that.

researchBanner

All the features you need in Sample Size software

Created by Sample Size experts, nQuery boasts an extensive list of features for Sample Size Calculation and Power Analysis. This is why it is the #1 choice for Researchers and Biostatisticians worldwide.

  • 100’s of validated sample size tables & procedures, with results outputted in the correct regulatory format

  • Customizable plotting functionality, Side-tables and extra tools increase speed and accuracy of calculations

  • Clean spreadsheet style interface allows you easily demonstrate and share knowledge to non statisticians

See All Features

Popular Sample Size Resources

Improve your knowledge and calculation of sample size

Innovative-Sample-Size-Methods-for-Adaptive-Clinical-Trials-Watch-on-Demand-nQuery-1

Given the high failure rates and the increased costs of clinical trials, researchers need innovative design strategies to best optimize financial resources and reduce the risk to patients.

Rewatch our recent webinar where we examine Adaptive trials using the new Adapt Module.

In this webinar you will learn about:
  • The pros and cons of adaptive designs
  • Sample Size Re-estimation
  • Group-Sequential Design
  • Conditional Power
  • Predictive Power

 

Watch Recording Now