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If you are worried about weight loss, to help you check if you are losing too much weight and are at risk of becoming malnourished, BAPEN has developed a simple screening tool you can use along with advice to follow if you are at risk of becoming malnourished.

This screening tool is based on the ‘Malnutrition Universal Screening Tool’ (‘MUST’), a validated nutrition screening tool developed by BAPEN to help identify adults at risk of undernutrition and the need for dietary advice. ‘MUST’ is the most common nutritional screening tool used by healthcare professionals throughout the UK. However, studies have shown that patients can screen themselves effectively using a simplified version of ‘MUST’ similar to the one provided here. If you have any concerns please discuss them with your GP or healthcare professional.

All you need to do is to enter your current weight and your height in the calculator below and then enter the weight you were 3 – 6 months ago before you became ill or lost weight.

Self-Screening Calculator

Complete all relevant fields and your results will automatically appear below.




Weight Loss:


Risk Category:



* BMI is a measure that you can use to see if you or the person you care for are a healthy weight for your/their height.