Scientific Calculator
This free online scientific calculator handles trig functions, logarithms, exponents, roots, and constants — all in your browser, with no app or download needed.
Quick Reference
What This Scientific Calculator Can Do
A scientific calculator goes beyond basic arithmetic — it handles the kinds of problems that come up in physics, chemistry, engineering, and higher math. Trigonometry, logarithms, exponents, roots, and mathematical constants like π and e are all built in. This one runs entirely in your browser, with no app to install and nothing to sign up for. If you need to graph functions visually, Desmos is a great complement — but for numeric computation, this scientific calculator gets the job done without the clutter.
The keypad is organized into three tabs. The Main tab covers everyday operations: trig (sin, cos, tan), powers, roots, and parentheses. The Func tab has logarithms (log, ln), inverse trig (sin⁻¹, cos⁻¹, tan⁻¹), and hyperbolic functions. The ABC tab provides variable letter keys (a–f) for substitution-style problems. The DEG/RAD toggle at the top switches angle measurement mode.
The display shows a live preview as you type — you can see the result before committing. The history panel (above the display) keeps your last 5 calculations. The ANS button pulls the most recent result into the next expression, which is useful for multi-step problems.
3 Keypad Tabs
Main (trig + arithmetic), Func (log/ln/inverse trig), ABC (variable letters a–f). Each tab is optimized for a different type of problem.
DEG & RAD Modes
Switch between degree and radian angle measurement with a single click. The active mode is shown in the control bar — easy to spot before you calculate.
History + ANS Button
Your last 5 results are saved above the display. Press ANS to chain the previous result into a new calculation — no retyping numbers between steps.
Common Functions Reference
| Function | Button | What It Does | Example |
|---|---|---|---|
| Sine | sin( | Ratio of opposite side to hypotenuse | sin(30°) = 0.5 |
| Cosine | cos( | Ratio of adjacent side to hypotenuse | cos(60°) = 0.5 |
| Tangent | tan( | Ratio of opposite to adjacent side | tan(45°) = 1 |
| Log (base 10) | log( | Power of 10 that produces x | log(100) = 2 |
| Natural log | ln( | Power of e that produces x | ln(e) = 1 |
| Exponent | x^( | Raise x to any power | 2^10 = 1024 |
| Square root | √( | Principal square root of x | √(144) = 12 |
| Pi | π | Mathematical constant ≈ 3.14159 | 2π ≈ 6.283 |
| Euler's number | e | Base of natural logarithms ≈ 2.71828 | e^1 ≈ 2.718 |
Inverse trig functions (sin⁻¹, cos⁻¹, tan⁻¹) and hyperbolic functions are available in the Func tab.
When You Actually Need a Scientific Calculator
Physics & Engineering
Projectile motion, wave frequency, electrical circuits — trig and exponents are everywhere. Finding the launch angle for a 30 m/s projectile to travel 50 m? That's sin⁻¹(ag/v²) — one expression in this scientific calculator.
Chemistry & Biology
pH = −log[H⁺]. A solution with [H⁺] = 0.001 mol/L has pH = −log(0.001) = 3. Radioactive decay uses e^(−λt). Both formulas are one button on this scientific calculator.
Finance & Statistics
Continuous compounding: A = Pe^(rt). Standard deviation involves square roots. These formulas show up more in real financial work than most people expect — and they're all supported here.
Tips for Getting the Most Out of It
DEG vs RAD — Pick the Right Mode
Most high school textbooks use degrees. College math and physics often switch to radians. Quick check: if sin(90) returns 0.894 instead of 1, you're in RAD mode by accident. Switch the toggle in the top bar.
Always Use Parentheses
sin(30) is unambiguous. sin 30 might not be. Same goes for exponents and fractions — wrap sub-expressions in parentheses to make order of operations explicit.
Chain Calculations With ANS
After computing a result, press ANS to pull it into your next expression without retyping. Useful for multi-step problems where each step builds directly on the previous answer.
Your Keyboard Works Too
Type digits and operators (+, −, *, /) directly. Use ^ for exponents. Enter or = evaluates. Backspace deletes the last character. Esc clears the display. Faster than clicking for number-heavy calculations.
Frequently Asked Questions
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