How to use this calculator
- Enter or choose expression.
- Enter or choose angles in.
- The result updates as you type. Use Copy result or Share to keep it.
Method
Order of operations: brackets, then functions and powers (right to left: 2^3^2 = 2^9), then × and ÷, then + and −, each left to right.
- π
- 3.14159265358979…
- e
- 2.71828182845905… (base of natural logarithms)
- x%
- x ÷ 100
- n!
- 1 × 2 × … × n
Worked example
- Brackets first: 3 + 4 = 7.
- Then the power: 7² = 49.
- Then multiply: 2 × 49 = 98.
2 × (3 + 4)² = 98.
What the result means
Results are shown to 12 significant digits, which removes the tiny binary rounding errors computers make (so 0.1 + 0.2 shows 0.3). For exact fractions or step-by-step algebra, use the math solver.
Assumptions and limits
- Trigonometric functions use the angle mode you choose; inverse functions return angles in that mode.
- A minus sign before a power applies to the whole power: −2² = −4.
- Numbers are double-precision floating point (about 15–16 significant digits). Use the Big Number calculator for exact large integers.
Questions
Why does sin(30) give −0.988?
Your calculator is in radians. Switch to degrees: sin(30°) = 0.5.
What does “2(3)” mean?
A number directly before a bracket, π or a function is multiplied: 2(3) = 6 and 2π ≈ 6.283.
How do I enter a power?
Use the xʸ key or type ^, for example 2^10 = 1024. x² squares the last number.