Free Medical Calculators for USA Healthcare Professionals & Patients
Our medical calculators cover every major clinical calculation you need in 2026. From weight-based drug dosing and GLP-1 titration to BMI, lab value conversions, and medical practice valuations — every tool runs instantly in your browser with no sign-up, no data stored, and no cost.
Whether you're a physician prescribing medication, a nurse calculating pediatric doses, a pharmacist checking reconstitution ratios, or a patient tracking your own health metrics, our USA-focused medical tools deliver professional-grade results in seconds. Each calculator uses FDA-approved formulas and industry-standard clinical guidelines, updated annually for accuracy.
Dosage Calculators
Our dosage calculators cover the most commonly prescribed medications in the USA. The Semaglutide Dosage Calculator and Tirzepatide Dosage Calculator handle GLP-1 titration schedules for Ozempic, Wegovy, Mounjaro, and Zepbound. The Insulin Calculator and Novolog Insulin Calculator help diabetic patients calculate mealtime doses. Additional calculators cover Metformin, Levothyroxine, Lisinopril, Atorvastatin, Prednisone, and Gabapentin — all using weight-based or standard adult dosing. The Benlysta Vial Calculator and Actemra Dosing Calculator handle specialty infusion medications for autoimmune conditions.
Health Assessment Tools
Our health assessment calculators provide instant clinical insight. The BMI Amputation Calculator adjusts body mass index for limb loss using peer-reviewed limb mass percentages. The Eosinophil Calculator and Cholesterol HDL Ratio Calculator convert lab values into clinically meaningful metrics. The Aortic Valve Area Calculator uses the continuity equation for cardiology assessment. The SCORAD Calculator measures atopic dermatitis severity, and the 20/20 Scale Calculator converts eye prescriptions to Snellen acuity. The Work RVU Calculator and Therapy Productivity Calculator help healthcare administrators track provider productivity.
Pharmacy & Lab Tools
Pharmacists and lab technicians rely on our pharmacy calculators. The Semaglutide Reconstitution Calculator and Tirzepatide Reconstitution Calculator ensure accurate peptide mixing for compounded medications. The Hemocytometer Calculator counts cells in lab samples, while the RNA Molecular Weight Calculator converts nucleotide sequences to molecular weights. The Medicine Refill Calculator and Prescription Refill Calculator help patients track when to reorder medications.
Specialty Medical Tools
Rounding out our category are specialty tools. The Banfield Anesthesia Calculator helps veterinary professionals dose anesthetics for dogs and cats. The CooperVision Contact Lens Calculator converts prescriptions for contact lens fitting. The Hospice Benefit Period Calculator tracks Medicare hospice benefit periods. The Dental Practice Valuation Calculator estimates practice value using EBITDA multiples. The Car Accident Injury Calculator and Dog Bite Settlement Calculator help patients estimate personal injury claim values.