Clinical calculators

The calculations you do on every shift. They work offline once the site is saved on your phone.

• IV drip rate calculator (drops per minute)Work out drops per minute and mL per hour for any IV fluid and giving set.
• Maintenance fluid calculator (Holliday–Segar and adults)Daily and hourly maintenance fluids for children (4-2-1 rule) and adults (25–30 mL/kg/day).
• Glasgow Coma Scale (GCS) calculatorScore eyes, verbal and motor response, with the breakdown to write in the notes.
• CURB-65 pneumonia severity calculatorScore community-acquired pneumonia and decide home, ward or ICU.
• Wells score for pulmonary embolismTwo-level Wells score: PE likely or unlikely, and what to do next.
• Wells score for DVTTwo-level Wells score for deep vein thrombosis.
• CHA₂DS₂-VASc score for atrial fibrillationStroke risk in atrial fibrillation and whether to anticoagulate.
• Corrected calcium calculator (mg/dL)Adjust serum calcium for a low albumin.
• Anion gap calculatorAnion gap from sodium, chloride and bicarbonate, with causes of a high gap.
• BMI calculator (with Asian cut-offs)Body mass index with the lower cut-offs used for South Asian adults.
• Paediatric weight estimate by age (APLS)Estimate a child’s weight when you cannot weigh them.
• Parkland formula for burnsFirst 24-hour fluid for burns from weight and % TBSA.
• QTc calculator (Bazett)Correct the QT interval for heart rate.
• eGFR and creatinine clearance calculatorCKD-EPI eGFR and Cockcroft–Gault creatinine clearance for drug dosing, using creatinine in mg/dL.
• Pregnancy due date and gestational age calculatorExpected date of delivery (Naegele’s rule) and today’s gestational age from the LMP.
• ORS and dehydration fluid calculator (WHO plans B and C)ORS volume for some dehydration and IV Ringer’s lactate volumes for severe dehydration in children.
• Paracetamol and ibuprofen syrup dose calculator for childrenDose in mg and mL by weight for common syrup strengths.
• qSOFA score for sepsisQuick bedside screen for patients with infection at risk of poor outcome.