Free — No Registration Required

Free UK Health Tools & Clinical Calculators

Evidence-based calculators and self-assessment tools built for the UK. Every tool cites NHS, NICE, or WHO guidelines. Results in seconds — no data stored.

NHS

Guidelines Referenced

WHO

Classification Standards

Data Stored

Free

No Registration

What Free Health Tools Does RxSure Offer?

WHO & NHS-referenced formulas

Free, evidence-based calculators referenced from NHS, WHO, and NICE guidelines. BMI uses the WHO classification, blood pressure follows ESC/ESH 2018 guidelines, and calorie needs use the Mifflin-St Jeor equation. No registration required — no health data stored. Explore all platform features or learn about pharmacy solutions.

BMI Calculator

Calculate your Body Mass Index using the WHO classification. Metric & imperial.

Blood Pressure Checker

Check your reading against ESC/ESH 2018 hypertension classification.

Calorie Calculator

Calculate your daily calorie needs using the Mifflin-St Jeor equation (TDEE).

Hay Fever Severity Score

5-question ARIA-based assessment. Find out if your symptoms are mild, moderate, or severe.

Pharmacy Revenue Calculator

Project annual revenue and ROI from your private clinical services.

Clinical Disclaimer

All tools on this page are for informational and educational purposes only. Results do not constitute medical advice and must not be used as a substitute for professional clinical assessment. Always consult a registered healthcare professional if you have concerns about your health. RxSure tools are reviewed annually against NHS, NICE, WHO, and relevant UK clinical guidelines.

All health tools clinically reviewed by Tahir Hameed, Pharmacist Independent Prescriber (GPhC: 2210908) — Last reviewed: April 2026

Frequently Asked Questions

Are RxSure health tools free to use?

Yes, every health tool on RxSure is completely free and requires no registration or account creation. Simply visit the tool page, enter your details, and receive your result instantly. We do not store any personal health data entered into the calculators. All tools are openly accessible to anyone in the UK and are designed to complement, not replace, professional medical advice.

How accurate are the health calculators?

All RxSure health calculators use clinically validated formulas referenced from NHS, WHO, NICE, or ESC/ESH guidelines. Each tool is reviewed annually by a qualified pharmacist independent prescriber. While the calculators provide reliable indicative results, they are intended for informational purposes only and should not replace a consultation with a registered healthcare professional for clinical decisions.

Can I use these tools on my pharmacy website?

RxSure health tools are available on the RxSure website and can be linked to from any pharmacy website. If you are a pharmacy owner interested in integrating private clinical services or embedding health tools into your patient journey, visit our for pharmacies page to learn more about partnership options and how RxSure can support your clinical services.