Scientific Calculator

What is the Free Scientific Calculator?

The free online Scientific Calculator provides a full set of mathematical functions in your browser — including trigonometry (sin, cos, tan, asin, acos, atan), logarithms (log base-10 and natural log), square root, powers (xⁿ, x²), the reciprocal (1/x), modulus (%), and the constants π and e. Switch between Degrees and Radians at any time, use the memory functions (M+, M−, MR, MC), and review the last 10 calculations in the built-in history panel.

• → Solve trigonometry problems for physics, engineering, or architecture homework
• → Calculate logarithms and exponentials for chemistry and finance calculations
• → Compute angles and distances in geometry and surveying problems
• → Quick scientific calculations without opening a physical calculator
• → Check manual calculations and verify results on exam revision

How to Use the Free Scientific Calculator

1. 1 Click the calculator buttons or type directly — the expression is shown in the display.
2. 2 Use DEG / RAD (top-left button) to toggle between degrees and radians mode for trigonometric functions.
3. 3 For scientific functions like sin(, type the argument then close the bracket: e.g. sin(45) then =.
4. 4 Use xⁿ to enter a power (e.g. 2^10), x² to square the current value, and √( for square root.
5. 5 Press M+ to store a value in memory, MR to recall it. The history panel below the keypad shows your last 10 results.

Key Features

• 📐
  Full trig suite

  sin, cos, tan plus their inverses asin, acos, atan — in degrees or radians.
• 🔢
  Logarithms & powers

  log (base-10), ln (natural), √x, x², and xⁿ for any exponent.
• 🧠
  Memory functions

  M+, M−, MR, and MC for storing and recalling intermediate values.
• 🕘
  Calculation history

  Last 10 expressions and results kept visible below the keypad.

Example Usage

Expression: sin(30) in DEG mode

0.5

History:
sin(30) = 0.5

Frequently Asked Questions about the Free Scientific Calculator

What is the free Scientific Calculator?

Full scientific calculator with trigonometric, logarithmic, and algebraic functions.

Is the Scientific Calculator free to use?

Yes, the Scientific Calculator is completely free. No account, subscription, or signup is required — ever.

Does my data get uploaded anywhere?

No. The Scientific Calculator runs entirely in your browser. Your data is never sent to any server.

Does it work offline?

Yes. Once the page has loaded, the tool works without an internet connection.

Which browsers are supported?

All modern browsers — Chrome, Firefox, Safari, and Edge. No plugins or extensions required.

When should I use DEG vs RAD mode?

Use DEG (degrees) for everyday geometry, navigation, and most school problems where angles are given in degrees (e.g. a right angle is 90°). Use RAD (radians) for calculus, physics, and programming — where angles are expressed as multiples of π (a right angle is π/2 ≈ 1.5708 rad). The current mode is shown in the top-left of the display.

Why does sin(90) give 1 in degrees but not 1 in radians?

In degrees, sin(90°) = 1. In radians, sin(90) means sin(90 radians), which is approximately sin(90 mod 2π) ≈ sin(2.124) ≈ 0.87 — a very different angle. If you switch to RAD mode and want sin of a right angle, enter sin(π/2) or approximately sin(1.5708).

How do I calculate log base-2 or log base-n?

Use the change-of-base formula: log_n(x) = log(x) ÷ log(n), where log is base-10. For example, log₂(1024) = log(1024) ÷ log(2) = 3.0103 ÷ 0.3010 = 10. Enter this as: log(1024) ÷ log(2) using the calculator.

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