BTS Pulmonary Nodule Risk Prediction Calculator

These risk prediction calculators are provided to assist clinicians in relation to the diagnosis and management of pulmonary nodules – the information provided here should be used in conjunction with the BTS guideline for the  investigation and management of pulmonary nodules, and the detail of each model is given via the links below.

Please read the disclaimer and check the box to indicate that you accept the terms of use - links to each calculator will then be displayed. 

i-phone and Android App 

Cancer Research UK and BTS in partnership have produced an app which includes the risk calculators and summary information from the guideline.  The app was initially released in December 2016 for iPhone – it has since been updated and released on Android.

Amongst other improvements, as suggested by users, the updated version now displays only the patient management recommendations that are relevant to the calculator results.

The Pulmonary Nodule Risk App is free to download:



More information on the App, including plans for Android/Windows versions can be found on the CRUK website.

October 2017


The risk prediction calculator tool ("RPCT") functionality made available on this page is provided "as is" with no warranties whatsoever.

The British Thoracic Society, on its own behalf and on behalf of all of its service providers associated with the RPCT ("BTS") and its licensors, hereby expressly exclude to the fullest extent permitted by law all express, implied, and statutory warranties and conditions including, without limitation, warranties and conditions of merchantability, fitness for any particular purpose, non-infringement of proprietary rights, security, reliability, timeliness, and performance.

You hereby acknowledge and agree that: (a) your use of the RPCT is entirely at your own discretion and risk; (b) BTS excludes all liability for any loss or damage arising from such use to the fullest extent permissible by law; (c) the RPCT is for information purposes only, you are not entitled to base any treatment or other medical decision on information obtained from the RPCT and you agree to be solely responsible for, and to indemnify BTS and hold BTS harmless against, any loss or damage arising from any such decision.

Please confirm that you accept the conditions of use for this tool by checking this box