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Yes, your privacy is our priority. Most tools process files directly in your browser without uploading to our servers.

What types of tools are available on 30tools?

We offer tools for image processing, video conversion, audio editing, PDF manipulation, text processing, code formatting, and much more.

Basic Calculator

Simple, fast, and reliable calculator for everyday calculations

Basic Calculator

Click buttons or use your keyboard for calculations

Calculator Functions

🧮 Basic Operations

• Addition (+): Add two or more numbers
• Subtraction (-): Subtract one number from another
• Multiplication (×): Multiply numbers together
• Division (÷): Divide one number by another
• Equals (=): Calculate and display result

🔧 Additional Functions

• Percentage (%): Calculate percentages
• Square Root (√): Find square root of numbers
• Clear (C): Clear current entry
• All Clear (AC): Clear all calculations
• Memory: Store and recall numbers

How to Use the Calculator

Enter Numbers

Click number buttons or use your keyboard to enter numbers

Choose Operation

Select the operation you want to perform (+, -, ×, ÷)

Get Result

Press equals (=) to calculate and display the result

Keyboard Shortcuts

⌨️ Number Keys

• 0-9: Enter numbers
• . (period): Decimal point
• Enter: Calculate result
• Escape: Clear all

🔣 Operation Keys

• + (plus): Addition
• - (minus): Subtraction
• * (asterisk): Multiplication
• / (slash): Division

Calculator Tips

💡 Usage Tips

• Use parentheses for complex calculations
• Double-check your entries before calculating
• Use memory functions for repeated calculations
• Clear the calculator between different problems
• Round results appropriately for your needs

⚠️ Common Mistakes

• Forgetting to clear previous calculations
• Mixing up multiplication and addition signs
• Not using proper order of operations
• Entering decimal points incorrectly
• Dividing by zero (undefined result)

More Calculators

🔬 Scientific Calculator

Advanced calculator with scientific functions.

Calculate →

📊 Percentage Calculator

Calculate percentages, increases, and decreases.

Calculate →

🔢 Fraction Calculator

Add, subtract, multiply, and divide fractions.

Calculate →

Basic Calculator

Simple, fast, and reliable calculator for everyday calculations

Basic Calculator

Click buttons or use your keyboard for calculations

Calculator Functions

🧮 Basic Operations

• Addition (+): Add two or more numbers
• Subtraction (-): Subtract one number from another
• Multiplication (×): Multiply numbers together
• Division (÷): Divide one number by another
• Equals (=): Calculate and display result

🔧 Additional Functions

• Percentage (%): Calculate percentages
• Square Root (√): Find square root of numbers
• Clear (C): Clear current entry
• All Clear (AC): Clear all calculations
• Memory: Store and recall numbers

How to Use the Calculator

Enter Numbers

Click number buttons or use your keyboard to enter numbers

Choose Operation

Select the operation you want to perform (+, -, ×, ÷)

Get Result

Press equals (=) to calculate and display the result

Keyboard Shortcuts

⌨️ Number Keys

• 0-9: Enter numbers
• . (period): Decimal point
• Enter: Calculate result
• Escape: Clear all

🔣 Operation Keys

• + (plus): Addition
• - (minus): Subtraction
• * (asterisk): Multiplication
• / (slash): Division

Calculator Tips

💡 Usage Tips

• Use parentheses for complex calculations
• Double-check your entries before calculating
• Use memory functions for repeated calculations
• Clear the calculator between different problems
• Round results appropriately for your needs

⚠️ Common Mistakes

• Forgetting to clear previous calculations
• Mixing up multiplication and addition signs
• Not using proper order of operations
• Entering decimal points incorrectly
• Dividing by zero (undefined result)

More Calculators

🔬 Scientific Calculator

Advanced calculator with scientific functions.

Calculate →

📊 Percentage Calculator

Calculate percentages, increases, and decreases.

Calculate →

🔢 Fraction Calculator

Add, subtract, multiply, and divide fractions.

Calculate →