Scientific Calculator

About the Scientific Calculator

Scientific Calculator gives you the full spread of trigonometric (sin/cos/tan), logarithmic (log/ln), exponential, factorial and power functions directly in the browser. Ideal for homework, quick engineering checks and exam prep.

How to use

1. Tap digits and operators on the virtual keypad.
2. Use DEG / RAD to switch angle mode.
3. Use memory (M+, M-, MR) to keep running totals.

Benefits & key features

• Everything a CASIO fx-82 ships with, plus keyboard input.
• Works offline — safe to use without exam-mode cheating concerns.
• No ads, no popups, no upsells.
• Accurate to JavaScript's 64-bit floating-point precision.

Pro tip

Keyboard: digits just work, * multiplies, / divides, Enter equals, and Backspace deletes the last entry.

Why choose toolsfy for Calculators tools?

A good calculator should give you a defensible number you can paste into a spreadsheet, not a vague range behind a paywall. toolsfy's calculators show every formula, every step and every input so you can trust the result — and cross-check it. Because the math runs in your browser, there is no latency, no rate limit, and no risk of a server returning a cached, stale, or rounded answer.

Common use cases

• Engineering students verifying textbook answers on the bus, without burning mobile data on a heavyweight scientific-calculator app.
• Freelancers converting between units in client briefs — millimetres to inches, pounds to kilograms, US fluid ounces to millilitres — in seconds.
• Shopkeepers calculating the effective percentage change in margins after a supplier price hike, without firing up Excel on a point-of-sale tablet.

Frequently asked questions