Free Online Calculators, Converters & Generators
Fast, accurate, and easy-to-use calculators, converters, and generators for all your mathematical, financial, and digital needs. Convert files, resize images, calculate finances, and more. No registration required, completely free, and optimized for mobile devices.
Percentage Calculator
Calculate percentages, percentage increase/decrease, and find what percentage one number is of another.
Calculate Percentages →Tip Calculator
Calculate tips and split bills among multiple people. Perfect for restaurants, delivery, and services.
Calculate Tips →Loan Calculator
Calculate monthly payments, total interest, and loan costs for mortgages, car loans, and personal loans.
Calculate Loans →Calorie Calculator
Calculate your daily caloric needs based on age, gender, weight, height, and activity level.
Calculate Calories →Tax Calculator
Calculate income taxes for multiple countries including US, UK, Canada, Australia, Germany, France, and Japan.
Calculate Taxes →QR Code Generator
Create custom QR codes for text, URLs, WiFi passwords, contact information, and more. Instant generation with download options.
Generate QR Codes →Password Generator
Generate strong, secure passwords with customizable length and character types. Perfect for account security.
Generate Passwords →Currency Converter
Convert between 150+ world currencies with real-time exchange rates. Updated every minute for accuracy.
Convert Currency →Knowledge Hub
Learn the science behind calculations with our comprehensive guides covering formulas, tax laws, and financial mathematics.
Explore Articles →All Tools
Access all our calculators and generators in one place. Bookmark this page for quick access to all your calculation needs.
Why Choose Our Calculators?
Lightning Fast
Get instant results with our optimized calculation engines
Privacy Focused
No data collection, no tracking, your privacy is protected
Mobile Optimized
Works perfectly on all devices, smartphones to desktops
Accurate Results
Precisely calculated results you can trust for important decisions
Comprehensive Online Calculator Suite
Financial Calculators
Our financial calculator suite includes tools for loan calculations, tip calculations, and tax planning. Whether you're planning a major purchase, dining out, or preparing for tax season, our calculators provide the accuracy and reliability you need.
- Loan payment calculations with amortization
- Tip and bill splitting for groups
- Tax calculations for 7+ countries
- Percentage calculations for any scenario
Health & Fitness Calculators
Maintain your health and fitness goals with our comprehensive calorie calculator. Based on scientific formulas and research, get accurate daily caloric needs for weight loss, maintenance, or muscle gain.
- BMR calculation using Mifflin-St Jeor equation
- TDEE based on activity levels
- Weight loss and gain calorie targets
- Customizable for all fitness goals
Educational Resources
Deepen your understanding with our comprehensive knowledge hub featuring detailed articles on mathematical formulas, tax laws, financial planning, and calculation methodologies.
- Percentage formulas and business applications
- International tax systems and laws
- Loan mathematics and interest calculations
- Digital security and privacy guides
How to Use Our Calculators
Each calculator is designed for simplicity and accuracy. Simply enter your values, and get instant results. All calculations are performed locally in your browser for maximum privacy and speed. No registration, no personal information required, and no data is stored or transmitted.
Frequently Asked Questions
Are these calculators free to use?
Yes, all our calculators are completely free to use with no hidden fees or subscription requirements.
Do I need to create an account?
No account creation is necessary. You can use all calculators immediately without any registration.
Are my calculations private?
Yes, all calculations are performed locally in your browser. No data is sent to our servers or stored.
Can I use these on mobile devices?
Absolutely! All our calculators are fully responsive and optimized for mobile devices.