Smart Tools Hub
Accurate and Reliable Free Online Calculators
Our Mission
Smart Tools Hub aims to help everyone make better financial decisions and live healthier lives by providing accurate calculation tools for free. We strive to simplify complex calculations and make professional tools accessible to everyone.
We aim to bridge the gap in financial literacy and help everyone make informed decisions. We provide an environment where you can easily and quickly perform calculations needed in various areas of daily life, including investment, loans, and health management.
About Our Service
Smart Tools Hub is a free online calculator service that started in 2024. It was created for people who want to easily calculate complex financial computations or health-related figures. Our team consists of software developers, financial experts, and UX designers, working together to provide user-centered services.
We prioritize user privacy protection. All calculations are processed directly in the user's browser, and we do not store any personal data on our servers. This is our commitment to ensuring users can use our service with confidence.
Key Features
Accurate Calculations
Reliable results using verified formulas and algorithms. We apply academically recognized formulas to all tools including compound interest and calorie calculations.
Completely Free
Use all calculators and tools for free, no registration required. No hidden costs or premium feature locks.
Privacy Protected
Your data is not stored on our servers. All calculations are processed in your browser for complete privacy.
Mobile Optimized
Use conveniently on any device - PC, tablet, or smartphone. Responsive design provides optimal experience on any screen.
Multi-language Support
Service available in Korean and English. Language switching is easy from the top menu.
Fast Performance
Fast and smooth user experience powered by Next.js and modern web technology. Pages load and calculations display instantly.
Our Tools
Compound Interest Calculator
Calculate how your investment grows with compound interest. Includes Rule of 72 and monthly deposit features.
Calorie Calculator
Calculate your daily calorie needs using the Mifflin-St Jeor equation. BMR, TDEE, and goal-based calories.
Loan Prepayment Fee Calculator
Calculate prepayment penalties for paying off your loan early. Sliding scale and regulatory considerations.
BMI Calculator
Calculate your Body Mass Index to assess health status. WHO-based classifications included.
D-Day Calculator
Calculate days remaining until a specific date. Useful for exams, anniversaries, and events.
⚠️ Disclaimer
All calculation results provided by this service should be used for reference purposes only. Please consult with qualified professionals (financial advisors, accountants, doctors, nutritionists, etc.) before making actual financial, investment, or health-related decisions. We do not guarantee the accuracy or completeness of calculation results, and we are not responsible for any loss or damage resulting from decisions based on these calculations.
Contact Us
Feel free to contact us with any questions, bug reports, or feature suggestions about our service. Your feedback is invaluable for improving our service.