Free Online Calculators for Math, Physics, Chemistry, Conversions & More

Access 22+ free, accurate calculators with step-by-step solutions. Perfect for students, professionals, and everyday calculations. No registration required—calculate instantly.

100% Free
Instant Results
Step-by-Step Solutions
Mobile Friendly

Popular Calculators

Most used calculators by our users

Percentage Increase Calculator

Calculate the percentage increase from an original value to a new value

Calculate →

Percentage Decrease Calculator

Calculate the percentage decrease from an original value to a new value

Calculate →

Percentage Difference Calculator

Calculate the percentage difference between two values

Calculate →

Slope Calculator

Calculate the slope of a line from two points or from an equation

Calculate →

Distance Between Two Points

Calculate the distance between two points in 2D or 3D space using the distance formula

Calculate →

Area Calculator (All Shapes)

Calculate the area of various geometric shapes including rectangle, circle, triangle, square, parallelogram, and trapezoid

Calculate →

Perimeter Calculator

Calculate the perimeter of various geometric shapes including rectangle, circle, triangle, square, parallelogram, and trapezoid

Calculate →

Matrix Multiplication Calculator

Multiply two matrices with custom rows and columns. Calculate matrix products step-by-step with detailed solutions

Calculate →

Determinant Calculator

Calculate the determinant of a square matrix with custom rows and columns. Get step-by-step solutions for matrix determinants

Calculate →

Inverse Matrix Calculator

Calculate the inverse of a square matrix with custom rows and columns. Get step-by-step solutions for matrix inverses

Calculate →

Loan Calculator

Calculate loan payments, total interest, and amortization schedule for any loan

Calculate →

Mortgage Payoff Calculator

Calculate mortgage payoff time, total interest savings, and payment schedule with extra payments

Calculate →

Simple Interest Calculator

Calculate simple interest on principal amount with interest rate and time period

Calculate →

Compound Interest Calculator

Calculate compound interest with principal, interest rate, compounding frequency, and time period

Calculate →

Investment Return Calculator

Calculate investment returns, total return percentage, and profit/loss from initial investment and current value

Calculate →

ROI Calculator

Calculate Return on Investment (ROI) percentage from investment cost and return amount

Calculate →

Trade Calculator

Calculate trade profit, loss, profit percentage, and return on investment for stock and trading transactions

Calculate →

Future Value Calculator

Calculate the future value of investments with present value, interest rate, time period, and compounding frequency

Calculate →

Present Value Calculator

Calculate the present value of future cash flows using discount rate, future value, and time period

Calculate →

Income Tax Calculator

Calculate income tax based on taxable income and tax brackets. Estimate your tax liability for planning and budgeting purposes

Calculate →

GPA Calculator

Calculate Grade Point Average (GPA) from course grades and credit hours. Supports multiple courses and standard 4.0 scale.

Calculate →

CGPA Calculator

Calculate Cumulative Grade Point Average (CGPA) from multiple semester GPAs and credit hours. Track overall academic performance.

Calculate →

Why Choose Cora Calculator for Your Online Calculations?

Cora Calculator is your comprehensive destination for free online calculators covering mathematics, physics, chemistry, and unit conversions. Whether you're a student working on homework, a professional solving complex problems, or someone who needs quick calculations, our platform provides accurate, instant results with detailed step-by-step explanations.

Unlike other calculator websites, we don't just give you answers—we help you understand the process. Every calculator includes comprehensive educational content, formulas, examples, and detailed explanations that make learning easier. Our calculators are designed to be both powerful tools and educational resources.

Comprehensive Calculator Collection

Mathematics Calculators

Our math calculator collection covers everything from basic arithmetic to advanced algebra. Calculate percentages, solve quadratic equations, work with fractions, perform order of operations, and much more. Each calculator includes formulas, examples, and step-by-step solutions.

  • Basic arithmetic operations (addition, subtraction, multiplication, division)
  • Percentage calculations and conversions
  • Algebraic equation solvers
  • Fraction operations and simplifications
  • Coordinate geometry tools

Physics Calculators

Physics calculations made simple with our collection of physics calculators. Calculate speed, velocity, acceleration, force, momentum, work, and more. Perfect for students studying physics and professionals working with physics principles.

  • Kinematics calculators (speed, velocity, acceleration)
  • Mechanics calculators (force, momentum, work)
  • Accurate formulas and unit conversions
  • Step-by-step physics problem solutions
  • Educational content for understanding concepts

Chemistry Calculators

Chemistry students and professionals rely on our chemistry calculators for accurate calculations. Work with moles, molar mass, stoichiometry, pH calculations, and more. Each calculator includes relevant formulas and detailed explanations.

  • Mole and molar mass calculations
  • Stoichiometry and reaction calculations
  • pH and pOH calculators
  • Acid-base chemistry tools
  • Comprehensive chemistry formulas

Unit Converters

Convert between units effortlessly with our bidirectional unit converters. Whether you need to convert length, weight, temperature, volume, or any other measurement, our converters provide instant, accurate results in both directions.

  • Length, weight, and temperature conversions
  • Volume, area, and speed converters
  • Time, data storage, and energy conversions
  • Bidirectional conversion support
  • Precise conversion factors

Key Features That Set Us Apart

100% Free Forever

All our calculators are completely free with no hidden costs, subscriptions, or premium tiers. Access every calculator, feature, and educational content without any restrictions.

Step-by-Step Solutions

Every calculator provides detailed step-by-step solutions, not just answers. Understand how calculations work and learn the underlying concepts with comprehensive explanations.

No Registration Required

Start calculating immediately without creating an account or providing personal information. All calculations are processed locally in your browser for privacy and speed.

Mobile Optimized

All our calculators work seamlessly on desktop, tablet, and mobile devices. Calculate on the go with our responsive, touch-friendly interface.

Accurate & Verified

Every calculator is thoroughly tested and verified for accuracy. We use precise formulas, proper rounding, and validated algorithms to ensure reliable results.

Educational Focus

Beyond calculations, we provide comprehensive educational content including definitions, formulas, examples, use cases, and best practices to help you learn.

Who Uses Cora Calculator?

Students at All Levels

From elementary school to university, students use Cora Calculator for homework, exam preparation, and understanding complex concepts. Our step-by-step solutions help students learn, not just get answers. Whether you're working on basic arithmetic, solving algebra problems, calculating physics equations, or balancing chemical reactions, our calculators provide the tools and explanations you need to succeed.

Educators and Teachers

Teachers and professors use our calculators to verify solutions, create examples, demonstrate concepts, and support their teaching. Our comprehensive educational content makes it easy to explain calculations and concepts to students. The detailed explanations and step-by-step solutions serve as excellent teaching aids in classrooms and online learning environments.

Professionals and Researchers

Engineers, scientists, researchers, and other professionals rely on Cora Calculator for accurate, quick calculations in their daily work. Our calculators save time, reduce errors, and provide reliable results for professional applications. Whether you're designing structures, conducting research, analyzing data, or solving technical problems, our calculators deliver the precision you need.

Everyday Users

Whether you're converting units for a recipe, calculating percentages for shopping, solving everyday math problems, or working on home improvement projects, Cora Calculator makes life easier. Our user-friendly interface and instant results help you get answers quickly without the complexity of traditional calculators or spreadsheets.

How to Use Our Free Online Calculators

  1. Find Your Calculator
  2. Browse by category or use our search function to find the calculator you need. We organize calculators by Math, Physics, Chemistry, and Conversions for easy navigation.

  3. Enter Your Values
  4. Input your numbers, values, or measurements into the calculator fields. Our calculators have clear labels and helpful placeholders to guide you.

  5. Get Instant Results
  6. Calculations happen instantly as you type. No need to click buttons or wait for processing—results appear immediately.

  7. Review Step-by-Step Solutions
  8. Each calculator provides detailed step-by-step solutions showing how the calculation was performed. Learn the process, not just the answer.

  9. Explore Educational Content
  10. Every calculator page includes comprehensive content including definitions, formulas, examples, use cases, and best practices to deepen your understanding.

Frequently Asked Questions

Are the calculators really free?

Yes, absolutely! All our calculators are 100% free with no hidden costs, subscriptions, or premium features. You can use every calculator, access all educational content, and get step-by-step solutions completely free of charge.

Do I need to create an account?

No registration or account creation is required. You can start using our calculators immediately without providing any personal information. All calculations are processed locally in your browser.

How accurate are the calculations?

We take accuracy seriously. Every calculator is thoroughly tested and verified using precise formulas, proper rounding methods, and validated algorithms. However, we recommend double-checking critical calculations, especially for professional or academic purposes.

Can I use these calculators on mobile devices?

Yes! All our calculators are fully responsive and optimized for mobile devices. They work seamlessly on smartphones, tablets, and desktop computers with touch-friendly interfaces and fast performance.

Do you store my calculation data?

No, we don't store any of your calculation data. All calculations are processed entirely in your browser and never transmitted to our servers. Your privacy is important to us.

How often do you add new calculators?

We continuously expand our calculator collection based on user needs and feedback. We regularly add new calculators, improve existing ones, and update content to ensure accuracy and relevance.

Start Calculating Today

Ready to solve your calculation problems? Browse our collection of free online calculators above, or use the search function to find exactly what you need. Whether you're working on math homework, solving physics problems, balancing chemical equations, or converting units, Cora Calculator has the tools you need.

Join thousands of students, professionals, and everyday users who trust Cora Calculator for accurate, free calculations with comprehensive educational content. Start calculating now—no registration required!

Why Choose Cora Calculator for Your Online Calculations?

Cora Calculator is your comprehensive destination for free online calculators covering mathematics, physics, chemistry, and unit conversions. Whether you're a student working on homework, a professional solving complex problems, or someone who needs quick calculations, our platform provides accurate, instant results with detailed step-by-step explanations.

Unlike other calculator websites, we don't just give you answers—we help you understand the process. Every calculator includes comprehensive educational content, formulas, examples, and detailed explanations that make learning easier. Our calculators are designed to be both powerful tools and educational resources.

Comprehensive Calculator Collection

Mathematics Calculators

Our math calculator collection covers everything from basic arithmetic to advanced algebra. Calculate percentages, solve quadratic equations, work with fractions, perform order of operations, and much more. Each calculator includes formulas, examples, and step-by-step solutions.

  • Basic arithmetic operations (addition, subtraction, multiplication, division)
  • Percentage calculations and conversions
  • Algebraic equation solvers
  • Fraction operations and simplifications
  • Coordinate geometry tools

Physics Calculators

Physics calculations made simple with our collection of physics calculators. Calculate speed, velocity, acceleration, force, momentum, work, and more. Perfect for students studying physics and professionals working with physics principles.

  • Kinematics calculators (speed, velocity, acceleration)
  • Mechanics calculators (force, momentum, work)
  • Accurate formulas and unit conversions
  • Step-by-step physics problem solutions
  • Educational content for understanding concepts

Chemistry Calculators

Chemistry students and professionals rely on our chemistry calculators for accurate calculations. Work with moles, molar mass, stoichiometry, pH calculations, and more. Each calculator includes relevant formulas and detailed explanations.

  • Mole and molar mass calculations
  • Stoichiometry and reaction calculations
  • pH and pOH calculators
  • Acid-base chemistry tools
  • Comprehensive chemistry formulas

Unit Converters

Convert between units effortlessly with our bidirectional unit converters. Whether you need to convert length, weight, temperature, volume, or any other measurement, our converters provide instant, accurate results in both directions.

  • Length, weight, and temperature conversions
  • Volume, area, and speed converters
  • Time, data storage, and energy conversions
  • Bidirectional conversion support
  • Precise conversion factors

Key Features That Set Us Apart

100% Free Forever

All our calculators are completely free with no hidden costs, subscriptions, or premium tiers. Access every calculator, feature, and educational content without any restrictions.

Step-by-Step Solutions

Every calculator provides detailed step-by-step solutions, not just answers. Understand how calculations work and learn the underlying concepts with comprehensive explanations.

No Registration Required

Start calculating immediately without creating an account or providing personal information. All calculations are processed locally in your browser for privacy and speed.

Mobile Optimized

All our calculators work seamlessly on desktop, tablet, and mobile devices. Calculate on the go with our responsive, touch-friendly interface.

Accurate & Verified

Every calculator is thoroughly tested and verified for accuracy. We use precise formulas, proper rounding, and validated algorithms to ensure reliable results.

Educational Focus

Beyond calculations, we provide comprehensive educational content including definitions, formulas, examples, use cases, and best practices to help you learn.

Who Uses Cora Calculator?

Students at All Levels

From elementary school to university, students use Cora Calculator for homework, exam preparation, and understanding complex concepts. Our step-by-step solutions help students learn, not just get answers. Whether you're working on basic arithmetic, solving algebra problems, calculating physics equations, or balancing chemical reactions, our calculators provide the tools and explanations you need to succeed.

Educators and Teachers

Teachers and professors use our calculators to verify solutions, create examples, demonstrate concepts, and support their teaching. Our comprehensive educational content makes it easy to explain calculations and concepts to students. The detailed explanations and step-by-step solutions serve as excellent teaching aids in classrooms and online learning environments.

Professionals and Researchers

Engineers, scientists, researchers, and other professionals rely on Cora Calculator for accurate, quick calculations in their daily work. Our calculators save time, reduce errors, and provide reliable results for professional applications. Whether you're designing structures, conducting research, analyzing data, or solving technical problems, our calculators deliver the precision you need.

Everyday Users

Whether you're converting units for a recipe, calculating percentages for shopping, solving everyday math problems, or working on home improvement projects, Cora Calculator makes life easier. Our user-friendly interface and instant results help you get answers quickly without the complexity of traditional calculators or spreadsheets.

How to Use Our Free Online Calculators

  1. Find Your Calculator
  2. Browse by category or use our search function to find the calculator you need. We organize calculators by Math, Physics, Chemistry, and Conversions for easy navigation.

  3. Enter Your Values
  4. Input your numbers, values, or measurements into the calculator fields. Our calculators have clear labels and helpful placeholders to guide you.

  5. Get Instant Results
  6. Calculations happen instantly as you type. No need to click buttons or wait for processing—results appear immediately.

  7. Review Step-by-Step Solutions
  8. Each calculator provides detailed step-by-step solutions showing how the calculation was performed. Learn the process, not just the answer.

  9. Explore Educational Content
  10. Every calculator page includes comprehensive content including definitions, formulas, examples, use cases, and best practices to deepen your understanding.

Frequently Asked Questions

Are the calculators really free?

Yes, absolutely! All our calculators are 100% free with no hidden costs, subscriptions, or premium features. You can use every calculator, access all educational content, and get step-by-step solutions completely free of charge.

Do I need to create an account?

No registration or account creation is required. You can start using our calculators immediately without providing any personal information. All calculations are processed locally in your browser.

How accurate are the calculations?

We take accuracy seriously. Every calculator is thoroughly tested and verified using precise formulas, proper rounding methods, and validated algorithms. However, we recommend double-checking critical calculations, especially for professional or academic purposes.

Can I use these calculators on mobile devices?

Yes! All our calculators are fully responsive and optimized for mobile devices. They work seamlessly on smartphones, tablets, and desktop computers with touch-friendly interfaces and fast performance.

Do you store my calculation data?

No, we don't store any of your calculation data. All calculations are processed entirely in your browser and never transmitted to our servers. Your privacy is important to us.

How often do you add new calculators?

We continuously expand our calculator collection based on user needs and feedback. We regularly add new calculators, improve existing ones, and update content to ensure accuracy and relevance.

Start Calculating Today

Ready to solve your calculation problems? Browse our collection of free online calculators above, or use the search function to find exactly what you need. Whether you're working on math homework, solving physics problems, balancing chemical equations, or converting units, Cora Calculator has the tools you need.

Join thousands of students, professionals, and everyday users who trust Cora Calculator for accurate, free calculations with comprehensive educational content. Start calculating now—no registration required!