Scientific Calculator

Advanced online calculator with trigonometric, logarithmic, exponential and memory functions

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Calculation History

Advanced Functions

Trigonometric, logarithmic, exponential, factorial and other scientific functions.

Memory Functions

Memory store, recall, add and subtract functions for complex calculations.

Mobile Friendly

Works perfectly on all devices - desktop, tablet or smartphone.

How to Use the Scientific Calculator

A complete guide to all calculator functions and features

Basic Operations

For simple calculations:

  • Click numbers to enter values
  • Use +, -, ×, ÷ for basic arithmetic
  • Press = to calculate the result
  • Use . for decimal points
  • AC clears all calculations
  • +/- toggles positive/negative

Scientific Functions

Advanced mathematical operations:

  • x²: Square the current value
  • √: Square root
  • x^y: Raise to power (enter base, press x^y, enter exponent)
  • x!: Factorial
  • π: Inserts pi (3.1416...)
  • e: Inserts Euler's number (2.718...)

Trigonometric Functions

All trigonometric functions use degrees by default:

  • sin: Sine function
  • cos: Cosine function
  • tan: Tangent function
  • For inverse functions, press "2nd" then the trig function
  • For hyperbolic functions, press "2nd" then "hyp"

Memory Functions

Store values for complex calculations:

  • M+: Add current value to memory
  • M-: Subtract current value from memory
  • MR: Recall memory value
  • MC: Clear memory
  • Memory is preserved between calculations

Pro Tips for Efficient Use

Order of Operations
  • Calculator follows standard PEMDAS order
  • Use parentheses to force specific order
  • Chain calculations automatically use previous result
Keyboard Shortcuts
  • Type numbers directly from keyboard
  • Enter for equals
  • Esc for clear (AC)
  • Arrow keys to navigate history

Frequently Asked Questions

Answers to common questions about our scientific calculator

Our calculator provides results with up to 15 decimal places of precision, using JavaScript's built-in math functions which implement IEEE 754 floating-point arithmetic. For most practical purposes, this provides more than enough accuracy. However, like all digital calculators, there can be very small rounding errors in certain complex calculations due to the nature of floating-point representation.

By default, all trigonometric functions (sin, cos, tan) use degrees. To switch to radians, press the "2nd" button followed by "DRG" until RAD is displayed. You can cycle between degrees (DEG), radians (RAD), and gradians (GRAD) using this function.

Yes! This calculator works entirely in your browser using JavaScript, so once the page is loaded, you can use it offline. You may want to bookmark the page or save it for offline use if you need frequent access without internet connectivity. All calculations are performed locally on your device - no data is sent to our servers.

To calculate inverse trigonometric functions (arcsin, arccos, arctan):
  1. Press the "2nd" button to activate secondary functions
  2. Press the corresponding trigonometric function button
  3. Enter your value
  4. Press "=" to calculate
For example, to calculate arcsin(0.5), you would: press "2nd", then "sin", then "0.5", then "=".

Yes! The calculator automatically maintains a history of your calculations in the history panel below the calculator. You can scroll through previous calculations and click on any entry to recall that value to the display. The history persists as long as you don't refresh the page or clear it manually using the "Clear History" button.

About Our Scientific Calculator

TodayBestLegitWays is committed to providing high-quality, reliable tools for education and professional use. Our scientific calculator was designed to meet the needs of students, engineers, scientists, and anyone who needs advanced mathematical functions.

This calculator implements all standard scientific calculator functions using precise mathematical algorithms. We've prioritized accuracy, usability, and clean design to create a tool you can rely on for important calculations.

While we strive for perfection, if you find any issues or have suggestions for improvement, please contact us through our feedback form.

Technical Specifications

Precision: 15 significant digits (IEEE 754 double-precision floating-point)

Functions Supported:

  • Basic arithmetic (+, -, ×, ÷)
  • Exponents and roots (x², √, x^y)
  • Trigonometric (sin, cos, tan and inverses)
  • Logarithmic (log, ln)
  • Factorials (x!)
  • Constants (π, e)
  • Memory functions (M+, M-, MR, MC)

Technology: Pure JavaScript - no server-side processing