About FreeBMIKit
Free online health calculators that respect your privacy. Everything runs in your browser — your data never leaves your device.
4
Tools
2
Unit Systems
0
Sign-ups Required
0
Data Sent to Server
Our Tools
BMI Calculator
Calculate Body Mass Index with visual gauge, category classification, and health tips.
Pregnancy Calculator
Due date calculation with week-by-week milestones and trimester tracking.
Ovulation Calculator
Fertile window tracking with 3-month calendar view and cycle predictions.
Sleep Calculator
Optimal sleep and wake times based on 90-minute sleep cycles.
Privacy & Security
100% Browser-Based
All calculations happen entirely in your browser. Your health data never leaves your device.
Instant & Accurate
Results appear instantly using standard medical formulas. No waiting for server responses.
Works Everywhere
Use on any device with a modern browser — desktop, tablet, or phone.