Scientific Calculator
Full scientific calculator with trigonometry, logarithms, powers, roots, and constants.
When basic arithmetic isn't enough — when you need trigonometry, logarithms, exponents, roots, or scientific notation — a scientific calculator is the right tool. This one brings those functions together in a clean, browser-based interface, so students, engineers, scientists, and anyone tackling a maths-heavy problem can compute without hunting for a physical device or wrestling with a cluttered app.
It covers the operations a standard calculator can't: sine, cosine and tangent and their inverses, natural and base-10 logarithms, powers and roots, factorials, and constants like π and e. Just as importantly, it respects the order of operations, so complex expressions evaluate correctly. Whether you are working through a physics problem set, checking an engineering formula, or doing statistics homework, the page below also explains the conventions — like radians versus degrees — that quietly cause most calculator errors.
Plug in some numbers —
we'll crunch.
How to use
- 1Type a mathematical expression: e.g. 2^10, sin(45), sqrt(144), log(1000).
- 2Use operators: + − * / ^ (power) % (modulo).
- 3Functions: sin, cos, tan, asin, acos, atan, sqrt, log (base 10), ln, abs, ceil, floor, round.
- 4Constants: π (pi), e (Euler's number).
- 5Select Degrees or Radians for trigonometric functions.
How it works
A scientific calculator evaluates expressions using the standard order of operations, often remembered as PEMDAS or BODMAS: parentheses first, then exponents and roots, then multiplication and division, and finally addition and subtraction. This is why 2 + 3 × 4 equals 14, not 20 — the multiplication is resolved before the addition. Building expressions with parentheses lets you override this default ordering when you need to.
The transcendental functions each have a precise definition: logarithms answer 'what power produces this number?' (log base 10 of 1000 is 3, because 10³ = 1000), while trig functions relate angles to ratios of a triangle's sides. The crucial setting is the angle mode: trigonometric functions interpret their input as either degrees or radians, and using the wrong mode is the single most frequent cause of wrong answers in trigonometry.
Worked examples
Order of operations in action
Evaluate 2 + 3 × 4² − 6 ÷ 2.
- Exponent first: 4² = 16.
- Then multiply and divide: 3 × 16 = 48 and 6 ÷ 2 = 3.
- Finally add and subtract: 2 + 48 − 3 = 47.
The answer is 47. Typing the expression left-to-right into a calculator that ignores precedence would give a different, wrong result — which is why a proper scientific calculator's ordering matters.
Degrees versus radians
Compute the sine of 30.
- In degree mode, sin(30°) = 0.5 — the familiar result.
- In radian mode, sin(30) ≈ −0.988, because 30 radians is a totally different angle.
The same keystrokes give wildly different answers depending on the angle mode. Always confirm whether you want degrees or radians before evaluating any trig function.
Tips & common mistakes
Check the angle mode before every trigonometry calculation. Switching between degrees and radians is the most common scientific-calculator mistake by far — a result that is off by a strange factor is almost always a degrees/radians mix-up rather than a typo.
Use parentheses liberally to make your intent explicit. When in doubt about how an expression will be grouped, wrap each part in brackets; it costs nothing and prevents the subtle precedence errors that come from trusting the calculator to read your mind. This is especially important with negative numbers and exponents, where −3² (meaning −(3²) = −9) differs from (−3)² (which is 9).
For very large or very small numbers, work in scientific notation (like 6.02 × 10²³) to avoid losing digits and to keep results readable. And remember that calculators carry limited internal precision, so rounding errors can creep into long chains of operations — for critical work, keep extra decimal places until the final step and round only at the end.
Frequently asked questions
Last reviewed: June 2026
About this calculator
Full scientific calculator with trigonometry, logarithms, powers, roots, and constants.