Scientific Calculator
A proper scientific calculator for coursework and quick checks — no install, no ads. Type or tap expressions like sin(pi/2), 2^10 or log(1000), and get exact results with standard operator precedence.
Functions: sin cos tan ln log (base 10) sqrt abs exp · Constants: π e · Radians · Keyboard supported.
How it works
- Type an expression using the on-screen keypad or your physical keyboard.
- Operators follow standard precedence: brackets → functions → powers → × ÷ → + −.
- Functions: sin, cos, tan, asin, acos, atan, ln, log (base 10), log2, sqrt, abs, floor, ceil, round, exp.
- Constants: pi and e — type “pi/2” directly.
- Press Enter or “=” to evaluate; a history of previous expressions is kept.
The formula
Precedence
brackets → functions → ^ → × ÷ → + −
Exactly the convention used in coursework: -2^2 evaluates to -(2^2) = -4, not 4.
Powers are right-associative
2^3^2 = 2^(3^2) = 512
Exponents stack from the top down, as in LaTeX and most calculators.
Worked example
Worked example
- Find sin(π/2) + log(1000):
- sin(π/2) = 1
- log(1000) = 3
1 + 3 = 4.
Common mistakes
- Writing log when you mean ln — this calculator follows convention: log = base 10, ln = base e.
- Forgetting brackets for denominators — “1/2+2” is 2.5, but “1/(2+2)” is 0.25.
- Using degrees thinking radians — sin/cos/tan use radians, the standard in calculus and physics.
Frequently asked questions
Does the calculator use radians or degrees?
Radians — the standard for university math and physics. Convert degrees first (× π/180) if needed.
Can I use my keyboard?
Yes — digits, operators, brackets and Enter all work from the keyboard. Functions like sin( are typed as text.
What happens if I divide by zero?
You get a clear message (“Division by zero”) instead of an error or infinity.
Is my expression sent anywhere?
No — everything is evaluated locally in your browser. This calculator works offline.
Related tools
Students who used Scientific Calculator also reach for these.
Unit Converter
Convert 90+ units across length, mass, temperature, area, volume, time, speed, energy, power, pressure, frequency and electrical units. Instant, accurate, free.
Percentage Calculator
Free percentage calculator: what percent is X of Y, what is X% of Y, and percentage change — three modes, instant answers.
GPA Calculator
Calculate your semester GPA by credit hours and letter grades. Supports 4.0 and 4.3 scales with instant, accurate results.