General chemistry calculators
The classic ratios and corrections hiding in a standard metabolic panel (CMP) — kidney context, calcium status, acid-base balance. Free, no account needed.
BUN/Creatinine Ratio Calculator
BUN ÷ creatinine from your metabolic panel — the classic ratio for reading kidney values in context, with textbook reference bands.
Corrected Calcium Calculator
Albumin-corrected calcium via the Payne formula — what your total calcium really means when albumin is off, with reference bands.
Anion Gap Calculator
Anion gap from sodium, chloride, and bicarbonate — the first-step acid-base signal on any metabolic panel, with textbook ranges.
Numbers are a start — symptoms tell the fuller story.
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Take the free health assessment →These tools are part of the Brevlix patient acquisition system
Free calculators and assessments attract patients who are already researching their symptoms. Brevlix turns that same pattern into a system for your practice: an AI health assessment on your website that screens patients, captures their details, and sends them a personalized report — before the first appointment.
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Every assessment produces a structured archetype report — you see the patient's symptom patterns before you meet them.
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13 pre-built clinical assessments. Pick a topic, customize, embed. No per-assessment fees.