Free Online Health,
Pregnancy &
PDF Tools
Simple, fast and accurate calculators and converters for fitness, pregnancy, nutrition and documents — designed with a clean iOS-style interface for the best experience on every device.
Featured Tools
Our most-used tools trusted by millions of users for accurate, instant results.
Calculate your Body Mass Index in metric or imperial. Get instant health category feedback — underweight, normal, overweight or obese.
Find how many weeks pregnant you are, your trimester, and what's happening with your baby's development week by week.
Calculate your daily calorie needs based on age, weight, height and activity level. Get personalized weight loss or gain targets.
Enter your last menstrual period date to calculate your estimated due date, gestational age, and key pregnancy milestones.
Convert PDF to JPG, PNG, WebP, AVIF, SVG and more. Convert images back to PDF too. All browser-based — zero uploads, zero privacy risk.
Calculate monthly EMI payments, total interest cost, and full repayment schedule. Supports any loan type with any interest rate or tenure.
Health Calculator
Accurate health metrics at your fingertips — BMI, BMR, body fat, ideal weight, pace and more.
Pregnancy Calculator
Essential pregnancy tracking tools — conception, due date, ovulation, period and weekly baby development.
Nutrition & Wellness Tools
Advanced nutrition and wellness calculators to help you optimize your diet and overall health.
PDF Converter & Document Tools
Convert, compress and process PDF documents instantly — fully browser-based, zero uploads required.
The ultimate PDF toolkit — convert, compress, merge, split and edit PDFs with full format support including Base64 and SVG output.
Convert PDF pages to JPG, PNG, WebP, AVIF, SVG, TIFF, GIF or Base64. Convert images back to PDF. All processing is 100% local.
Reduce PDF file size significantly without visible quality loss. Perfect for email attachments and uploading to portals with size limits.
Other Calculator
Practical finance tools to help you plan income tax and loan repayments with accuracy.
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How It Works
Three easy steps — no account, no downloads, no waiting.
Browse 50+ free health, pregnancy, nutrition, PDF and finance tools. Find what you need in seconds.
Fill in your age, weight, dates or upload your file. Clean, intuitive forms designed for every device.
See your results immediately with clear explanations and actionable insights. No waiting, no email required.
Every tool on CalcoraTools is completely free — no hidden fees, no subscriptions and no usage limits. Forever.
Loved by Users Worldwide
"CalcoraTools' pregnancy calculator is the most detailed I've found. It shows exactly what to expect each week with baby size comparisons. Used it every single day during my pregnancy!"
"The BMI and calorie calculator combo helped me set realistic fitness goals. The results are incredibly clear and the interface is beautiful — honestly better than most paid apps I've tried."
"The PDF converter is brilliant — converted an entire PDF report to individual JPGs in seconds, all in my browser with zero uploads to any server. This is exactly how all tools should work!"
Health & Tools Blog
Expert guides, calculator tips and health insights to help you get the most from our free online tools.
How to Calculate BMI — and Why It Matters for Your Health
Body Mass Index is one of the most widely used health screening tools in the world. Learn exactly how BMI is calculated using the standard formula, what your number means across every category, and the important limitations you should know before acting on your result.
TDEE Calculator: What Is Total Daily Energy Expenditure?
Understanding your TDEE is the foundation of any effective diet or fitness plan. This guide breaks down the Mifflin-St Jeor equation, activity multipliers, and how to use your TDEE result to hit your weight goals.
How to Convert PDF to JPG Without Uploading to Any Server
Most PDF converter websites send your files to remote servers — a serious privacy risk for sensitive documents. Learn how CalcoraTools' browser-based PDF converter processes everything locally, keeping your files 100% private.
Due Date Calculator Explained — Naegele's Rule and Beyond
Your estimated due date is one of the most important numbers in your pregnancy. Discover how our due date calculator uses Naegele's Rule, how accurate it is compared to an ultrasound, and what factors can shift your EDD.
Body Fat Percentage: What's Healthy and How to Measure It
BMI doesn't tell the full story — body fat percentage is far more precise. We compare every measurement method from Navy circumference to DEXA scanning, and explain how our free body fat calculator stacks up.
Loan EMI Calculator: How to Plan Any Loan Repayment
Whether you're planning a home loan, car finance or personal loan, understanding your monthly EMI before you sign is essential. This guide walks you through the EMI formula and how to use our calculator to build a full repayment schedule.