🏥 For Healthcare Professionals Only

The Obstetric Calculator
Built for Clinicians

25+ clinical tools covering dating, antenatal milestones, fetal assessment, screening, medications, and more — in one fast, offline-capable Android app.

▶  Get it on Google Play See All Tools →
25+
Clinical Tools
4
Dating Methods
100%
Evidence-Based
Free
No Subscription
Why ObiCalc

Everything you need at the bedside

Designed by clinicians, for clinicians. Fast, clean, and built around your workflow.

📅
Hijri & Gregorian Dates
Full support for both Islamic and Gregorian calendars across all dating methods. Toggle Hijri display anytime in settings.
💾
Save Patient Records
Save up to 100 patients per account with name and MRN. Records auto-expire at 60 weeks. Full history of your last 100 calculations.
📄
PDF Export
Export a full dating report — GA, EDD, ANC milestones, and Hijri dates — as a shareable PDF with your clinic name.
🌙
Dark Mode
Easy on the eyes during night shifts. Full dark mode across every screen, configurable from settings.
⚡
Instant Results
No loading, no waiting. All calculations are instant and run locally — no internet required for core functions.
🔒
Secure & Private
Your data stays with you. Secured by Firebase Auth. Patient records are stored under your account only — never shared.
Clinical Tools

25+ calculators and references

Covering the full spectrum of obstetric practice — from dating to delivery.

Pregnancy Dating
LMP Dating
Ultrasound EDD
IVF Dating (Day-3 / Day-5)
IUI Dating
Antenatal Screening
Pre-eclampsia Risk (1st Trimester)
VTE Risk Assessment
Aneuploidy Risk (T21)
Steroid Candidacy
OGTT Interpreter (GDM)
β-hCG Doubling Calculator
Preterm Labour Risk
Fetal Assessment
MCA-PSV (Fetal Anaemia)
Biophysical Profile (BPP)
Cord Blood Gas Interpreter
Timing of Delivery
Labour & Delivery
Bishop Score
VBAC Success Rate
ECV Success Rate
GBS Management Protocol
Oxytocin Augmentation Rate
Medications
MTX Dosing (Ectopic / GTD)
Anti-D / Kleihauer
MgSO₄ Toxicity Monitor
OCP / HRT Reference
Neonatal & Utilities
Apgar Score
BMI Calculator
Hijri ↔ Gregorian Converter
ANC Milestones Timeline
Clinical References
Who Uses ObiCalc

Built for the whole obstetric team

ObiCalc is designed for qualified healthcare professionals working in obstetrics and women's health.

👨‍⚕️
Obstetricians & Gynaecologists
👩‍⚕️
Family Medicine Physicians
🤱
Midwives
💉
Nurses & Allied Health
👶
Paediatricians
🏥
Medical Residents & Students

Download ObiCalc

Free on Android. No subscription. No ads. Built by clinicians who know what matters at the bedside.

▶  Download on Google Play

⚠️ For qualified healthcare professionals only. This app is a clinical decision support tool and does not replace professional clinical judgment.