Interactive tools
Calculators, pathways and dosing aids built for the bedside: critical care and acute medicine, ward and clinic decisions, and dosing conversions. Each names the guideline it is built on, shows its working, and runs entirely in your browser.
Recently used
Critical care & acute medicine
Numbers you need on a call: gases, ventilators, drips, sodium, DKA, potassium, withdrawal, stroke lysis, and the PE and chest-pain pathways.
Adult code companion (2025 AHA)
Adult arrest companion on 2025 AHA guidance: elapsed and cycle timers, epinephrine due window, shock and drug log you can copy, reversible causes, bradycardia, tachycardia and post-ROSC targets.
2025 AHA Guidelines for CPR & ECC · Parts 7, 9, 10, 11 Resuscitation · Code companionPediatric code companion
Pediatric cardiac arrest, bradycardia and tachycardia with a pulse, and post-ROSC targets (2025 AHA/AAP): weight-based shocks and doses with caps, cycle and epinephrine timers, event log.
2025 AHA/AAP Guidelines Part 6 & Part 8 · 2025 AHA algorithm text descriptions Delivery room · Code companionNewborn resuscitation (2025 AHA/AAP)
Delivery-room companion: clock from birth, SpO₂ target by minute, next step by heart-rate band, 30 s and 60 s checks, weight-based epinephrine and volume, IV/IO epinephrine timer, copyable log.
2025 AHA/AAP Part 5 Neonatal Resuscitation · 2025 neonatal algorithm Acute care · InterpreterAcid–base interpreter
Step-by-step ABG/VBG reading: Henderson check, Winter's and Berend compensation rules, albumin-corrected anion gap, delta ratio, osmolar and urine anion gaps, then GOLD MARRK and NAGMA differentials.
Berend NEJM 2014 · Figge 1998 · Rastegar 2007 Critical care · CalculatorVentilator calculator
ARDSNet predicted body weight and 4–8 mL/kg tidal volume table, mL/kg check of the set VT, driving pressure, P/F (Berlin) and S/F (2024 global ARDS definition), ROX index at 2, 6 and 12 h.
ARDSNet · ATS 2024 ARDS · Global ARDS definition 2024 · Roca 2019 Critical care · CalculatorDrip & vasopressor calculator
Norepinephrine, epinephrine, phenylephrine, vasopressin, dopamine, dobutamine, milrinone, angiotensin II: dose ↔ mL/h both ways, standard concentrations, label ranges, and norepinephrine equivalents (Kotani 2023).
FDA labels · SSC 2021/2026 · Kotani 2023 NEE Nephrology · Workup and plannerHyponatremia
Stepwise diagnosis (tonicity, urine osmolality, urine sodium, SIAD criteria) and an Adrogué–Madias correction planner with US 2013 and European 2014 limits, hypertonic bolus and rescue.
Adrogué–Madias NEJM 2000 · US panel 2013 · ESE/ESICM/ERBP 2014 Pulmonology · PathwayPE pathway
Wells (2- and 3-tier), PERC, YEARS and age-adjusted D-dimer for the next diagnostic step; sPESI, RV, troponin/BNP, lactate and hemodynamics for the 2026 AHA/ACC A–E category and ESC 2019 risk class.
2026 AHA/ACC acute PE guideline · ESC 2019 · YEARS · ADJUST-PE · PERC Emergency cardiology · Decision aidChest pain: HEART pathway
HEART score (History, ECG, Age, Risk factors, Troponin) with Backus 2013 6-week MACE rates, HEART Pathway (Mahler 2015) early-discharge logic with 0/3 h troponin, exclusions and hs-cTn notes.
Backus 2013 · Mahler 2015 · AHA/ACC 2021 · ACC/AHA 2025 Endocrine emergency · PathwayDKA & HHS
2024 ADA/EASD/JBDS/AACE/DTS consensus: DKA, HHS or mixed (euglycemic DKA flag), DKA severity, anion gap, effective osmolality, corrected Na; fluids, potassium gate, insulin, dextrose, bicarbonate, resolution, SC transition.
ADA/EASD/JBDS/AACE/DTS consensus 2024 (Umpierrez) Nephrology · Emergency planHyperkalemia
Hyperkalemia severity (UKKA 2026, KDIGO) with ECG; calcium salt and rate, insulin–glucose with the UKKA hypoglycemia protocol, salbutamol, SZC/patiromer, dialysis triggers, K⁺ and glucose recheck times.
UKKA 2026 · KDIGO 2020 (Lindner) · FDA labels Emergency & inpatient · Score + pathwayAlcohol withdrawal
PAWSS (cutoff ≥4), 10-item CIWA-Ar with ASAM 2020 bands (<10, 10–18, ≥19), RASS, hours-since-last-drink timeline, and ASAM benzodiazepine, phenobarbital, thiamine and ICU-escalation guidance.
ASAM 2020 AWM guideline · PAWSS (Maldonado 2015) · CIWA-Ar (Sullivan 1989) Neurology · Checklist + dosingStroke thrombolysis checklist
Minutes from LKW (live clock), 2026 AHA/ASA Table 8 absolute vs relative contraindications, BP <185/110, glucose, platelets/INR/aPTT, DOAC; TNK Table 7 weight bands, alteplase 0.9 mg/kg split; wake-up imaging routes.
2026 AHA/ASA AIS guideline (Tables 7–8) · TNKase and Activase labels Gastroenterology · CalculatorAcute pancreatitis
Revised Atlanta diagnosis check and severity grade, SIRS count, BISAP, modified Marshall organ failure, weight-based moderate fluid plan with checkpoints, and triglyceride mode with mg/dL–mmol/L conversion and a published insulin protocol.
ACG 2024 · IAP 2025 · Revised Atlanta 2012 · WATERFALL 2022 · Bi-TPAI / Le 2025 Cardiology · PathwayAortic dissection: ADD-RS and anti-impulse
ADD-RS plus D-dimer (ADvISED) to image or rule out acute aortic syndrome; anti-impulse checker for heart rate and SBP targets with the next agent and capped esmolol, labetalol, nicardipine and clevidipine doses.
2022 ACC/AHA aortic disease · 2024 ESC aortic diseases · ESVS 2026 · ADvISED · FDA labels Acute care · Decision toolBP emergency triage
Severe BP vs hypertensive emergency (2025 AHA/ACC). Targets for dissection, stroke (2026), ICH, pregnancy and postpartum (ACOG), ACS, pulmonary edema, catecholamine crisis, AKI; first-hour % limit; IV doses.
2025 AHA/ACC HBP · 2022 ACC/AHA aorta · 2026 AHA/ASA AIS · 2022 AHA/ASA ICH · ACOG · FDA labels Hematology · Emergency dosingAnticoagulant reversal
Adult reversal for warfarin, factor Xa inhibitors, dabigatran, IV direct thrombin inhibitors, heparins, fondaparinux and antiplatelets: Kcentra by INR band with caps, DOAC timing, idarucizumab, protamine, ICH classes.
FDA labels · AHA/ASA 2022 ICH · ACC ECDP 2020 · NCS/SCCM 2016 and 2026 · ACG-CAG 2022 · ACG 2023 Hematology · InterpreterTEG / ROTEM: what to give
Tick the abnormal TEG or ROTEM findings: slow initiation, heparin effect, slow clot build, weak clot, hyperfibrinolysis. Get the meaning and, in bleeding, the product direction by setting.
European trauma guideline 2023 · STS 2021 · EACTS/EACTAIC 2024 · AASLD/AGA/EASL · CRASH-2 · WOMAN · WHO 2017 · FDA 510(k) Oncology · Infection · PathwayFebrile neutropenia
IDSA/ASCO fever and neutropenia definitions with °F and ANC-from-differential, CTCAE v6.0 grade, MASCC and CISNE, ASCO 2018 outpatient criteria, IDSA empiric regimens and add-ons, cefepime label renal dose, antifungal and G-CSF steps.
IDSA 2010 · ASCO/IDSA 2018 · ASCO 2026 CSF · CTCAE v6.0Medicine, cardiology & nephrology
Risk, dosing and therapy decisions for the ward and the clinic.
AF anticoagulation
CHA₂DS₂-VASc and CHA₂DS₂-VA with Friberg 2012 stroke rates, ACC/AHA 2023 and ESC 2024 OAC thresholds, HAS-BLED, Cockcroft–Gault CrCl and FDA-label apixaban, rivaroxaban, dabigatran and edoxaban doses.
ACC/AHA/ACCP/HRS 2023 · ESC 2024 · FDA labels Cardiology · CalculatorLipids & statin decisions
Martin/Hopkins and Sampson/NIH LDL-C, PREVENT 10/30-year ASCVD risk, and the 2026 ACC/AHA dyslipidemia plan: risk category, statin intensity, LDL-C/non-HDL-C goals, CAC use and add-on therapy.
2026 ACC/AHA Dyslipidemia Guideline · PREVENT 2024 · Martin/Hopkins · Sampson/NIH Cardiology · ReferenceHeart failure therapy (FMT/GDMT)
HF drugs by LVEF: ESC 2026 FMT (HFrEF now <50%) vs ACC/AHA 2022 GDMT (HFmrEF 41–49%), classes, start/target doses, in-hospital DHF start rules, finerenone, vericiguat, digitoxin, pre-titration labs.
ESC 2026 HF · ACC/AHA/HFSA 2022 · FDA labels Nephrology · CalculatorKidney function
CKD-EPI 2021 eGFR with or without cystatin C, Cockcroft–Gault CrCl (actual, ideal, adjusted weight), BSA-adjusted eGFR for dosing, KDIGO CKD heat-map stage and AKI stage.
CKD-EPI 2021 · KDIGO 2024 CKD · KDIGO 2012 AKI Infectious diseases · Reference toolAntibiotic spectrum
Coverage grid for 38 antibiotics across MRSA, VRE, ESBL, KPC-CRE, Pseudomonas, Acinetobacter, anaerobes, atypicals and C. difficile, with monitoring, renal, boxed-warning and interaction notes.
IDSA AMR Guidance 2026 · EUCAST expected phenotypes · FDA labels Infectious disease · CalculatorPneumonia severity & empiric therapy
CURB-65, CRB-65, PSI/PORT class and ATS/IDSA severe-CAP criteria, with the ATS/IDSA 2019 empiric regimen, MRSA/Pseudomonas steps, cultures, 2025 ATS steroid and 3–5 day duration advice.
ATS/IDSA 2019 CAP · ATS 2025 CAP update · Fine 1997 (PSI) · Lim 2003 (CURB-65) Gastroenterology · CalculatorGI bleed scores
Upper GI: Glasgow-Blatchford (BUN or urea), AIMS65, pre- and post-endoscopy Rockall, ACG 2021 checklist, variceal bundle. Lower GI: Oakland score, shock index, ACG 2023 pathway.
ACG 2021 UGIB · ACG 2023 LGIB · ICG 2019 · ESGE 2021/2026 · ACG-CAG 2022 · AASLD 2024 · Baveno VIII Hepatology · CalculatorLiver disease scores
MELD 3.0 (OPTN rules) with 90-day survival, MELD-Na, original MELD, Child-Pugh, AASLD referral at MELD ≥15, FIB-4 (AASLD 2023 cut-offs), and alcohol hepatitis: MELD >20, Maddrey, Lille >0.45.
Kim 2021 (MELD 3.0) · OPTN · ACG 2024 ALD · AASLD/AST 2013 Cardiology · CalculatorQTc & drug risk
Bazett, Fridericia, Framingham and Hodges QTc with rate-based formula advice; >500 ms and ≥60 ms rise flags; Bogossian BBB adjustment; Tisdale risk score; K >4, Mg >2 targets and torsades steps.
AHA/ACCF Drew 2010 · AHA 2020 · Tisdale 2013 Pulmonology · PathwayCOPD management (GOLD 2026)
GOLD 2026 ABE group (≥1 exacerbation = E), initial and follow-up therapy by current regimen, eosinophil-guided ICS, roflumilast, azithromycin, dupilumab/mepolizumab, ensifentrine; Rome exacerbation severity, NIV, antibiotics.
GOLD 2026 report · US labels · BTS 2017 oxygen Hepatology · CalculatorAscites and HRS
Paracentesis: SAAG, total protein, PMN to SBP, albumin for LVP by liters and SBP by weight. HRS-AKI criteria per ICA-ADQI 2024 with albumin challenge. Terlipressin label eligibility and day-4 dosing.
AASLD 2021 · ICA-ADQI 2024 · Terlivaz label 2026 · AGA 2025 Pulmonology · InterpreterPFT interpreter
ERS/ATS 2022 PFT read from printed z-scores or LLNs: obstruction, restriction (TLC), mixed, non-specific or PRISm pattern, z-score severity, BDR as % predicted, Hb-adjusted DLCO, GOLD 0.70 check, next test.
ERS/ATS 2022 · ATS 2023 · GOLD 2026 · GOLD/GLI 2026 Nephrology · WorkupAKI workup
KDIGO AKI staging from creatinine and urine output with time windows, FENa and FEUrea with their caveats, urine sediment patterns, a cause workup and nephrotoxin checklist, and urgent dialysis indications with criteria.
KDIGO 2012 AKI · KDIGO 2026 AKI/AKD draft · STARRT-AKI Hematology · PlannerPeri-procedural anticoagulation planner
Day-by-day interruption plan for warfarin, apixaban, rivaroxaban, edoxaban, dabigatran, LMWH, UFH, aspirin and P2Y12 inhibitors: last dose, bridging, INR and restart by bleed risk and CrCl (CHEST 2022, PAUSE, BRIDGE).
CHEST 2022 · PAUSE 2019 · BRIDGE 2015 · FDA labels · ASRA Hematology · Score + pathwayHIT 4Ts score
4Ts pretest probability (Lo 2006) with a platelet fall helper, ASH 2018 steps by score and immunoassay result, argatroban US-label starting dose with hepatic adjustment, and the transfusion, warfarin and ultrasound rules.
Lo 2006 (4Ts) · ASH 2018 HIT · Argatroban US label 2026 Perioperative · Decision toolPreop cardiac risk
ACC/AHA perioperative pathway: urgency, active conditions, post-PCI timing, risk modifiers, RCRI with Lee rates, METs/DASI, BNP and troponin, testing with COR, beta-blocker, statin, SGLT2i, RAASi, GLP-1 RA.
ACC/AHA perioperative guideline 2026 (reaffirms 2024) · Lee 1999 Pulmonology · Decision toolIncidental lung nodule (Fleischner 2017)
Fleischner 2017 follow-up for incidental solid, ground-glass and part-solid nodules: applicability gate, partial CT and chest X-ray routing, prior-imaging stability, average-axis rounding, mm/cm entry, perifissural and benign rules.
Fleischner Society 2017 · Fleischner measurement statement 2017 · ACCP 2013 Infectious diseases · Decision toolMDRO: what to treat with
Culture-directed choices for ESBL-E, AmpC-E, CRE by carbapenemase (KPC, NDM/MBL, OXA-48), DTR P. aeruginosa, CRAB, S. maltophilia, MRSA and VRE by site, per IDSA 2026 AMR guidance and MRSA/SAB guidance.
IDSA AMR Guidance 2026 · IDSA MRSA 2011 · IDSA/ESCMID SAB 2026 · IDSA/ATS HAP/VAP 2016 Hematology · PathwayThrombocytopenia workup
Low platelets in adults: pseudothrombocytopenia check, action thresholds, pattern by context, PLASMIC, ISTH DIC and SIC scores, HELLP, ASH 2019/2026 ITP steps and AABB/ICTMG 2025 transfusion thresholds.
ISTH TTP 2020/2025 · ISTH DIC 2001 · ASH ITP 2019/2026 · AABB/ICTMG 2025 · ACOG · SOAP 2021 Hematology · Workup + pathwayEosinophilia workup
AEC bands, hypereosinophilia and HES by ICOG-EO 2023 with 2011, WHO and ICC alternatives, BSH 2017 workup, Strongyloides and Loa loa rules before steroids or ivermectin, DRESS and EGPA flags, imatinib and mepolizumab label rules.
ICOG-EO 2023 · Valent 2012 · ICC 2022 · WHO 2022 · BSH 2017 · US labels Rheumatology · Test interpreterRheumatology serologies: what to order and what it means
Panel by presentation with Choosing Wisely do-not-order limits; results read in context: ANA titer and ICAP pattern, ENA, myositis and SSc antibodies, RF/anti-CCP LRs, PR3/MPO-ANCA, aPL (2023 criteria), HLA-B27.
ICAP 2019 · 2017 ANCA consensus · 2023 ACR/EULAR APS · ACR/EULAR classification criteria · Choosing WiselyDosing & conversions
Insulin, electrolytes, steroids and opioids: starting estimates with every factor shown.
Inpatient insulin starter
ADA 2026 §16 and Endocrine Society 2022: weight-based start (0.4–0.5 U/kg; 0.2–0.3 if ≥70 y, eGFR <60 or hypoglycemia risk), home regimen scaled component by component, 60% of IV rate; correction scale, NPO, enteral/PN, steroid NPH.
ADA Standards of Care 2026 §16 · Endocrine Society 2022 · ES 2012 Table 1 / RABBIT 2 Nephrology · DosingElectrolytes
K⁺/Mg²⁺/phosphate repletion with rate caps; hypernatremia free-water deficit and capped hourly plan; corrected calcium, hypercalcemia band and ES 2023 steps with label doses; IV calcium; mg/dL ↔ mmol/L.
FDA labels · ES 2023 hypercalcemia of malignancy · AAFP 2015/2023 · SfE 2016 · ISMP · Bulloch 2024 Endocrinology · DosingSteroid converter
Glucocorticoid equivalents (ESE/ES 2024 Table 1), mineralocorticoid potency and half-life, HPA-suppression risk by dose and duration, taper steps, morning cortisol, and sick-day/perioperative stress doses.
ESE/Endocrine Society 2024 GC-induced AI guideline Pain · DosingOpioid conversion
Total MME (CDC 2022) for up to three opioids; rotation with a 25–50% cross-tolerance reduction, schedule rounded down to real strengths, breakthrough dose, and the fentanyl patch label table. Blocks methadone and buprenorphine.
CDC 2022 MME · McPherson 2018 equianalgesic table · fentanyl patch label Hematology · DosingVTE treatment
Apixaban, rivaroxaban, dabigatran, edoxaban, enoxaparin and UFH for DVT or PE: FDA-label initial, maintenance and extended doses, renal cutoffs, interactions, an avoid list with reasons, and duration guidance.
FDA labels · ASH 2020 · CHEST 2021 · 2026 AHA/ACC PE · ASH 2018Calculations run in your browser — nothing you enter is sent or stored. Educational use only; verify against your institution's protocols.