Open Paracelsus
ParacelsusOpen Paracelsus

Clinical calculators
built for real practice.

The scores, doses, and work-ups you use every day. Fast, referenced, offline.

Start a work-upGuided work-upsOpen the tools29 calculatorsHow it works60-second tour
FreeNo sign-upWorks offlineNo patient data stored
Estimated GFRCKD G3b
42 mL/min/1.73 m²
One-tap answersLock in the values, tap calculate — instant.
Patient contextEnter a value once; every tool shares it.
Visual evidenceRisk shown as 100 people, not fine print.
Straight to notesOne tap copies a formatted clinical line.
Works offlineFull function with zero signal on the ward.
SA units firstµmol/L, mmol/L, and kPa by default.
How it works

Built the way you actually work

01

Start from the labs

Paste the lab line into the search box. Flags appear; the right tools open pre-filled.

Paste the labs…
Na 131 ↓Cr 186 ↑
Open eGFR — pre-filledTwo flags. The right tool, values already in.
02

Understand, don't just compute

Every result shows its meaning. Risk is drawn as 100 people, not fine print.

10 will have a stroke this year90 will not
CHA₂DS₂-VASc 4, drawn as the people it describes.
03

Round on the whole ward

One block per bed. Results land on the right patient. Copy the round in one tap.

Bed 4Active · 2 resultseGFRNEWS2Bed 71 resultCURB-65
Bed 4:• eGFR 42 — CKD G3b• NEWS2 3 — ward obs
Round copied for notes
Try it now — open Paracelsus
200+automated checks before every release
0patient data stored or transmitted
24/7available wherever you work — even offline
Built on published evidence

Every answer should be traceable.

Paracelsus doesn’t invent clinical guidance. Every calculation links back to the evidence behind it — see the full ledger.

CKD-EPI2021View sourceCHEST2012View sourceWells2000View sourceLim2003View sourceHEART2008View sourceWHOView sourceGlasgow1974View source
Inside Paracelsus

Work-ups, built on tools

7 guided work-ups walk a decision from first question to guideline outcome, each step powered by one of 29 referenced calculators — and every answer lands on your patient.

7 work-ups

Guided work-ups

One question at a time, walked like a path — stones fill as you go, the outcome carries its reference.

  • ED admission — first assessment
  • Chest pain — HEART disposition
  • AF — anticoagulation decision
  • Suspected DVT work-up
  • Pneumonia — site of care
  • Sore throat — test or treat
  • Suspected PE work-up
See the work-ups29 calculators

The tools underneath

Every calculator referenced to its source and checked against published values on every release — one press to calculate and save.

eGFRNEWS2Warfarin INRWellsGCSABGQTcHAS-BLEDParklandAPGAR+ moreBrowse the tools

Calculating in seconds. On the ward in minutes.

No account. No download. Works offline.

Open Paracelsus