Is the Scientific Calculator free?

Yes — the Scientific Calculator is completely free, with no account, subscription, signup, or usage limits.

Is my data uploaded or stored?

No. The Scientific Calculator processes everything locally in your browser. Your input is never uploaded, saved, or shared with any server.

Does the Scientific Calculator work offline?

Yes. Once the page has finished loading, the Scientific Calculator works without an internet connection.

Which browsers does the Scientific Calculator work in?

The Scientific Calculator works in all modern browsers, including Chrome, Firefox, Safari, and Edge — no plugins or extensions needed.

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.

Scientific Calculator

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

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Free browser-based tool · Runs 100% on your device · Last updated July 7, 2026

What is the 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 Scientific Calculator

1 Click the calculator buttons or type directly — the expression is shown in the display.
2 Use DEG / RAD (top-left button) to toggle between degrees and radians mode for trigonometric functions.
3 For scientific functions like sin(, type the argument then close the bracket: e.g. sin(45) then =.
4 Use xⁿ to enter a power (e.g. 2^10), x² to square the current value, and √( for square root.
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

Example Input

Expression: sin(30) in DEG mode

Example Output

0.5

History:
sin(30) = 0.5

Frequently Asked Questions about the Scientific Calculator

What is the Scientific Calculator?: The Scientific Calculator is a free online tool that lets you full scientific calculator with trigonometric, logarithmic, and algebraic functions. It runs entirely in your browser, so there is nothing to install and nothing is uploaded to a server.
Is the Scientific Calculator free?: Yes — the Scientific Calculator is completely free, with no account, subscription, signup, or usage limits.
Is my data uploaded or stored?: No. The Scientific Calculator processes everything locally in your browser. Your input is never uploaded, saved, or shared with any server.
Does the Scientific Calculator work offline?: Yes. Once the page has finished loading, the Scientific Calculator works without an internet connection.
Which browsers does the Scientific Calculator work in?: The Scientific Calculator works in all modern browsers, including Chrome, Firefox, Safari, and Edge — no plugins or extensions needed.
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.