Scientific Calculator
A real working calculator: functions, constants, memory & percent.
See how it works
Watch a quick simulation of this tool in action — no file needed.
How to use Scientific Calculator
Follow these steps — everything happens instantly in your browser.
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Step 1. Tap digit and operator buttons, or type directly on your keyboard.
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Step 2. Use sin/cos/tan/log/ln/√ and constants π and e for advanced expressions.
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Step 3. Memory keys (MC, MR, M+, M−) let you store intermediate values.
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Step 4. Press = or Enter to evaluate — the result becomes the start of the next calculation.
Why use this tool
Private by design
All processing happens locally in your browser. Open DevTools → Network and you'll see zero file uploads. Ever.
Instant
No upload wait, no queue, no server round-trip. Results appear the moment you drop a file.
Free & unlimited
No accounts, no watermarks, no daily caps. Use it as many times as you like, forever.
Works everywhere
Desktop, tablet or phone — every tool is responsive and installable as a PWA for offline use.
Frequently asked questions
Everything you might want to know about scientific calculator.
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