Scientific Calculator
An interactive scientific calculator with memory functions, degree/radian trig, logs, powers, roots and parentheses — plus expression typing.
Click buttons or type directly into the display — ^ for power, ! for factorial, pi/e for constants.
About the Scientific Calculator
A scientific calculator is the one you reach for the moment a problem involves anything past the four basic operations — sine and cosine, logarithms, powers, roots, factorials, or a value of π or e carried out to real precision. It's the calculator behind algebra II, trigonometry, physics, and most engineering coursework, and the one professionals keep a tab open for when a quick check beats digging out a formula sheet.
Most people land here mid-problem: a homework set that suddenly needs sin(37°), a lab report that needs ln of a ratio, a spreadsheet formula they want to sanity-check by hand first. Typing the whole expression — parentheses, functions and all — and getting one clean answer is faster than hunting for the right buttons on a physical unit, and this one never dies mid-exam because the battery ran out.
Because trig functions mean two different things depending on whether the angle is in degrees or radians, getting that toggle right is the single most common place a scientific calculator produces a 'wrong' answer that's actually just the other angle mode.
How it’s calculated
Expressions are evaluated respecting standard order of operations — parentheses first, then exponents and functions, then multiplication and division, then addition and subtraction — exactly the way you'd work through it on paper, just applied automatically to the whole string at once.
The angle mode matters only for sin, cos and tan (and their inverses). A full circle is 360 degrees or 2π radians, so 30° and π/6 radians describe the identical angle — but typing sin(30) in radians mode evaluates sine of 30 radians, a completely different number from sin(30°). If a result looks wrong, the angle mode toggle is the first thing to check.
Logarithm functions come in two flavors: log() is base-10 (how many times you'd multiply 10 by itself to reach a number), while ln() is the natural log, base e ≈ 2.71828 — the base that shows up naturally in growth and decay math. sqrt() and ^ handle roots and powers, and constants like pi and e can be typed directly into any expression.
Frequently asked questions
Should I use degrees or radians mode?
Use degrees for most everyday and geometry problems (angles measured 0-360°), and radians for calculus, physics, and anything involving angular velocity or the unit circle in terms of π. If a trig result looks way off, the angle mode is almost always the reason.
What's the difference between log and ln?
log() is logarithm base 10; ln() is the natural logarithm, base e. log(100) = 2 because 10² = 100, while ln(100) ≈ 4.605 because e^4.605 ≈ 100 — they answer the same kind of question with a different base.
How do I calculate a square root or a power on a scientific calculator?
Use sqrt() for a square root — sqrt(16) returns 4 — and ^ for any power, so 2^10 returns 1024. Both can be nested inside a larger expression along with parentheses.
How is a scientific calculator different from a basic calculator?
A basic calculator only adds, subtracts, multiplies and divides. A scientific calculator adds trigonometry, logarithms, exponents, roots, factorials and constants like π and e — the functions you need once math moves past arithmetic into algebra, trig, or calculus.
Why does my answer not match what my phone's calculator shows?
The two most common culprits are angle mode (degrees vs. radians) and order of operations — especially implied multiplication next to parentheses, which some calculators handle differently. Re-typing the expression with explicit parentheses around each piece usually resolves the mismatch.
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