nyberry

Hi, I'm Nick.

Welcome to my site - a grab-bag of medical calculators, quick-reference tools, and the occasional musing.

Whether you’re here to run some numbers, check a clinical concept, or just browse, I hope you find something useful and thought-provoking.

BMI Calculator

Enter height and weight to calculate and explain body mass index. With a summary of the limitations of BMI.

Colorblind Test

A quick reference tool for screening red–green color vision deficiency using a selection of Ishihara plates.

Kidney Calculator

A clinical calculator for estimating kidney function using both eGFR and Creatinine Clearance. Useful for staging CKD and guiding drug dosing.

Growth Charts

Plot weight and height on paediatric growth charts using age, sex, and date of measurement. Useful for visualising growth trends and identifying problems.

Lab Unit Converter

Convert common lab values between US and European units. A quick-reference tool for interpreting international lab results.

Dermatome Map

A visual guide to dermatomes for localising sensory symptoms and identifying spinal nerve involvement.

Kids' Doses

A quick-reference tool for calculating common paediatric drug doses based on weight. Always cross-check with the BNFc or local guidelines.

Clini

A tool for extracting structured data from clinical documents and generating personalised, patient-friendly medical reports using AI. (Beta, May 2025)

Blog: What are GPs for when the Chips are Down?

2021-11-24

"They say that today’s papers will wrap tomorrow’s chips, but that hasn't actually been true since about 1981, when they realised the dyes in the ink were poisonous."

Blog: Moser’s Circle Problem - and why we still need GPs

2025-05-20

"Recently I was thinking about why GP training needs to take so long. Why can't we just replace GPs with reasonably smart people and computers?"

Disclaimer

This site is intended as a fun, quick reference tool and should not be relied upon as a sole source of information for clinical decision-making. While every effort is made to ensure accuracy, errors or omissions may occur. Users must verify all information against authoritative sources such as national guidelines or clinical protocols. The responsibility for safe clinical use remains entirely with the clinician.