Scientific Calculator
A clean scientific calculator supporting trigonometry, logarithms, powers, roots, factorials and the constants π and e. Type directly or click the keys.
Example
√(144) = 12 · 2^10 = 1024 · 5! = 120 · log(1000) = 3 · ln(e) = 1.
How it works
Enter an expression and press = (or Enter). Functions include sin, cos, tan, ln (natural log), log (base 10), √ (square root), ^ (power) and ! (factorial), plus the constants π and e. Expressions are evaluated with standard operator precedence.
Good to know
The Scientific Calculator evaluates full math expressions in one go, handling trigonometry (sin, cos, tan), natural and base-10 logarithms (ln, log), powers (^), square roots (√), factorials (!), and the constants π and e. Instead of pressing keys one at a time like a basic calculator, you write the whole formula — for example 2^10 + √(144) — and get a single answer using standard operator precedence. It runs entirely in your browser, so it suits students, engineers, and anyone who wants a quick, private replacement for a physical scientific calculator.
Reach for it when you need more than arithmetic: checking homework, evaluating a physics or statistics formula, computing compound growth with exponents, or converting a messy expression into one clean result. Because you can type or paste the entire line, it's faster than tapping individual buttons and easier to audit — you can see the whole expression before you press Enter.
To read the result correctly, remember a few conventions this tool uses. Trig functions expect angles in radians, not degrees, so an answer that looks "wrong" for sin or cos is usually a units issue. The calculator follows the usual order of operations (powers and functions before multiplication and division, which come before addition and subtraction), so use parentheses generously to force the grouping you mean rather than trusting precedence alone.
- Wrap function arguments and negatives in parentheses, e.g. √(144) and (-3)^2, so they're grouped as intended.
- Convert degrees to radians by multiplying by π/180 before any trig function.
- Note that factorials (!) only make sense for non-negative whole numbers; decimals or negatives will fail.
Frequently asked questions
Do the trig functions use degrees or radians?
Radians. To work in degrees, multiply by π/180 first — for example sin(30 × π ÷ 180) for sin(30°).
What's the difference between log and ln?
log is base-10 logarithm and ln is the natural logarithm (base e). So log(1000) = 3 and ln(e) = 1.
Can I use my keyboard?
Yes — type the expression directly into the display and press Enter to evaluate. The on-screen keys insert the matching symbols.
Is my data uploaded anywhere?
No. Everything is calculated in your browser with JavaScript — nothing is sent to a server, so it's private and works offline once loaded.
Is this calculator free?
Yes, completely free with no sign-up and no limits.
People also ask
How do I square a number on a scientific calculator?
Use the power operator: type the base, then ^2. For example, 7^2 gives 49. The same syntax works for any exponent, such as 3^4 for 81.
How do I calculate sin of 90 degrees?
Because this calculator works in radians, you must convert first: enter sin(90 × π ÷ 180), which equals 1. Entering sin(90) directly gives the sine of 90 radians, a different value.
What does the ^ symbol mean in a calculator?
The caret (^) means exponentiation, or raising a number to a power. So 2^3 means 2 to the third power, which equals 8.
How do I find a cube root with a scientific calculator?
There's no dedicated cube-root key, but you can use a fractional exponent: raise the number to the power of 1/3, such as 27^(1/3) to get 3. Keep the exponent in parentheses so it's evaluated as a single power.
Does this scientific calculator work offline?
Yes. Once the page has loaded in your browser, all calculations run locally in JavaScript with no server connection, so it continues to work without an internet connection.
How do I calculate a percentage on a scientific calculator?
Convert the percentage to a decimal and multiply. For 15% of 200, enter 0.15 × 200 to get 30. There is no separate percent key, so divide the percentage by 100 yourself.
Why does my factorial calculation return an error?
Factorials are only defined for non-negative whole numbers, so inputs like 3.5! or (-4)! are invalid. Use a whole number such as 5! to get 120.
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