Clinical answers, worked out in front of you

63 free clinical calculators for doctors, nurses and health officers in Ethiopia: eGFR, GCS, Ethiopian-calendar due dates, SAM care and TNM staging.

Made for clinical work in Ethiopia

Ethiopian calendar built in

Enter dates in ዓ.ም. or Gregorian and get both back: pregnancy due dates, gestational age, the fertile window, and a child's age from an Ethiopian-calendar date of birth.

• Estimated Due Date: Naegele’s rule with cycle adjustment, or from conception date.
• Gestational Age Calculator: GA in weeks + days from LMP or from a known EDD.
• Ovulation & Fertile Window: Predicted ovulation and six-day fertile window.
• Anthropometry & SAM Classifier: WHO z-scores, MUAC and edema, SAM/MAM classification.

The national SAM protocol

Severe acute malnutrition care as the Ethiopian guideline sets it out: WHO z-scores and MUAC, the appetite test, F-75 and F-100 feeds, RUTF rations and ReSoMal.

• Anthropometry & SAM Classifier: WHO z-scores, MUAC and edema, SAM/MAM classification.
• RUTF Appetite Test: Minimum RUTF amount for a valid appetite test, with pass/fail routing (OTP vs inpatient).
• F-75 / F-100 / RUTF Schedule Engine: F-75 / F-100 / RUTF volumes by weight and SAM phase.
• RUTF Sachet Dosing (OTP): Outpatient RUTF ration from current weight, sachets per day and per week.
• ReSoMal Rehydration: Rehydration volumes for dehydrated SAM children (not for shock).
• Weight Gain Velocity: g/kg/day weight-gain rate for nutritional rehabilitation monitoring.

Every tool, by department

General Medicine

• BMI Calculator: Body mass index with WHO clinical categories.
• Ideal Body Weight: Devine formula ideal body weight.
• Body Surface Area: Mosteller body surface area.
• Basal Metabolic Rate: Mifflin–St Jeor resting energy requirement.
• Creatinine Clearance: Cockcroft–Gault estimated creatinine clearance.
• eGFR (CKD-EPI 2021): Race-free CKD-EPI creatinine eGFR with CKD G-stage.
• Anion Gap: Serum anion gap for metabolic acidosis work-up.
• Serum Osmolality: Calculated serum osmolality and osmolal gap basis.
• Mean Arterial Pressure: MAP from systolic and diastolic pressure.
• Corrected Calcium: Albumin-corrected total serum calcium.
• Corrected Sodium: Glucose-corrected sodium in hyperglycemia.

Surgery

• TNM Cancer Staging: AJCC 8th / FIGO stage grouping for 14 cancer types.
• ASA Physical Status: ASA physical status classification with emergency modifier.
• RCRI · Revised Cardiac Risk Index: Lee index: perioperative risk of major cardiac events.
• Caprini VTE Risk Score: Surgical venous thromboembolism risk with prophylaxis tier.
• Alvarado Score: MANTRELS score for acute appendicitis probability.
• Ranson's Criteria: Acute pancreatitis severity (non-gallstone), admission + 48 h.
• Parkland Formula: Burn fluid resuscitation, 4 mL × kg × %TBSA lactated Ringer’s.
• Burn TBSA · Rule of Nines: Adult burn surface estimation by body region.
• MELD-Na Score: Liver disease severity (2016 MELD-Na) with 3-month mortality.
• Wells Score · DVT: Pre-test probability of deep vein thrombosis.
• Surgical Wound Classification: CDC wound class with typical surgical-site infection risk.

Oncology

• TNM Cancer Staging: AJCC 8th / FIGO stage grouping for 14 cancer types.
• ECOG Performance Status: ECOG/WHO performance status with Karnofsky equivalent.
• Chemo Dose by BSA: Body-surface-area–based chemotherapy dose.
• Absolute Neutrophil Count: ANC with CTCAE neutropenia grading.
• Carboplatin Dose (Calvert): AUC-based carboplatin dosing.

Obstetrics

• Estimated Due Date: Naegele’s rule with cycle adjustment, or from conception date.
• Gestational Age Calculator: GA in weeks + days from LMP or from a known EDD.
• Ovulation & Fertile Window: Predicted ovulation and six-day fertile window.
• Fundal Height Check: Symphysis–fundal height vs gestational age (after 20 weeks).
• Pregnancy Weight-Gain Guide: IOM recommended total gestational weight gain by pre-pregnancy BMI.
• Bishop Score: Cervical favorability for induction of labour.
• APGAR Score: Newborn condition at 1 and 5 minutes.

Gynecology

• Cervical Cancer Staging: FIGO 2018 cervical cancer staging with TNM equivalents.
• Ovulation & Fertile Window: Predicted ovulation and six-day fertile window.
• GTPAL Obstetric History: Formats obstetric history in GTPAL notation.

Cardiology

• ASCVD Risk (Pooled Cohort): 10-year atherosclerotic cardiovascular disease risk, ages 40–79.
• BP Classification: ACC/AHA 2017 blood pressure categories.
• QTc Calculator: Corrected QT by Bazett and Fridericia.
• CHA₂DS₂-VASc Score: Stroke risk in non-valvular atrial fibrillation.
• HAS-BLED Score: Major bleeding risk on anticoagulation in AF.
• Shock Index: Heart rate ÷ systolic BP, occult shock screen.
• Mean Arterial Pressure: MAP from systolic and diastolic pressure.

Pediatrics

• Anthropometry & SAM Classifier: WHO z-scores, MUAC and edema, SAM/MAM classification.
• Pediatric Dose (mg/kg): Weight-based dosing with per-dose maximum cap.
• APGAR Score: Newborn condition at 1 and 5 minutes.
• Pediatric Maintenance Fluids: Holliday–Segar daily volume and 4-2-1 hourly rate.
• Pediatric Estimated Weight: Age-based weight estimate when scales are unavailable.
• Pediatric BMI: BMI for children, interpret against growth percentiles.
• RUTF Sachet Dosing (OTP): Outpatient RUTF ration from current weight, sachets per day and per week.
• F-75 / F-100 / RUTF Schedule Engine: F-75 / F-100 / RUTF volumes by weight and SAM phase.

Nutrition & SAM

• Anthropometry & SAM Classifier: WHO z-scores, MUAC and edema, SAM/MAM classification.
• RUTF Appetite Test: Minimum RUTF amount for a valid appetite test, with pass/fail routing (OTP vs inpatient).
• F-75 / F-100 / RUTF Schedule Engine: F-75 / F-100 / RUTF volumes by weight and SAM phase.
• RUTF Sachet Dosing (OTP): Outpatient RUTF ration from current weight, sachets per day and per week.
• ReSoMal Rehydration: Rehydration volumes for dehydrated SAM children (not for shock).
• Weight Gain Velocity: g/kg/day weight-gain rate for nutritional rehabilitation monitoring.

Emergency & Critical Care

• Glasgow Coma Scale: Eye, verbal, motor assessment with severity band.
• qSOFA Score: Quick sepsis screen outside the ICU.
• SOFA Score: Sequential organ failure assessment across six systems.
• CURB-65: Community-acquired pneumonia severity & disposition.
• Wells Score · DVT: Pre-test probability of deep vein thrombosis.
• Wells Score · PE: Pre-test probability of pulmonary embolism.
• PaO₂ / FiO₂ Ratio: Oxygenation index with Berlin ARDS severity.
• Burn TBSA · Rule of Nines: Adult burn surface estimation by body region.
• Parkland Formula: Burn fluid resuscitation, 4 mL × kg × %TBSA lactated Ringer’s.

Endocrinology & Nephrology

• HbA1c ↔ Average Glucose: Estimated average glucose from HbA1c.
• HOMA-IR: Insulin resistance from fasting glucose and insulin.
• FENa: Fractional excretion of sodium, AKI work-up.
• eGFR (CKD-EPI 2021): Race-free CKD-EPI creatinine eGFR with CKD G-stage.
• Creatinine Clearance: Cockcroft–Gault estimated creatinine clearance.
• Corrected Calcium: Albumin-corrected total serum calcium.

Educational decision-support tools. They do not replace clinical judgment, local protocols or specialist advice: verify results before acting on them.