How do I calculate fractions?

Simply use the 'a/b' button on the keypad or press the fraction toggle icon next to your result.

Online Scientific Calculator – Free Advanced Calculator Tool

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Welcome to Online Scientific Calculator

Our free online scientific calculator is engineered to help students, developers, and professionals solve complex mathematical equations directly in the browser. Powered by advanced rendering engines, it supports visual typesetting so your equations look exactly like they do in your textbook.

📐 Visual Stacked Fractions

Click the a/b button to generate beautifully stacked vertical fractions. Roots, exponents, and absolute values format dynamically as you type.

⏱️ Living History

Your previous calculations stack cleanly above the input field. Click on any old equation to instantly edit it and recalculate the result.

💡 Complex Numbers

Toggle "Complex Mode" in the settings menu to replace percentages with the imaginary number i, allowing you to solve advanced calculus problems.

How to Use This Calculator

Keyboard Friendly: You can type directly using your physical keyboard. The math engine will automatically format your inputs.
Decimals to Fractions: When a calculation results in a decimal, a small fraction icon appears next to the answer. Click it to convert instantly.
Trig Functions: Ensure you have selected the correct angle measurement (RAD or DEG) from the top toolbar before calculating sine, cosine, or tangent.
Clear All: To start fresh, simply click the "clear all" text in the top right corner above the keypad.

Frequently Asked Questions

Is this scientific calculator online free to use?

Yes, it is 100% free to use. There are no downloads, no subscriptions, and no hidden fees.

How do I switch between fractions and decimals?

When an answer is a decimal, a small circular toggle button appears on the right side of the result line. Click it to instantly toggle the output to an exact stacked fraction.

Does this support Dark Mode?

Absolutely. Move your mouse to the top of the screen to reveal the header (or tap the top menu on mobile), and click the "🌙" button to toggle the UI theme.