How to Use the Scientific Calculator
The Scientific Calculator provides a full suite of mathematical functions — basic arithmetic, trigonometric functions (sin, cos, tan and their inverses), logarithms (log₁₀ and ln), powers, roots, factorials, constants (π, e), and more — all available instantly in your browser.
Use the calculator like a standard scientific calculator: enter numbers and operations in standard order, or use function buttons (sin, log, etc.) that wrap your current input. The display shows both the expression and result for clarity.
A key nuance is degree vs radian mode for trigonometric functions: sin(90°) = 1 in degree mode, but sin(90) = 0.894 in radian mode (since 90 radians ≠ 90 degrees). Always check your mode before performing trig calculations. Our calculator clearly indicates the current mode.
📊 Worked Example
Sample calculations:
- sin(30°) = 0.5
- log₁₀(1000) = 3
- e^3 = 20.0855
- √(144) = 12
- 7! = 5040
Common Use Cases
- ✅ Solving trigonometry problems for school or engineering
- ✅ Calculating logarithms for finance, science, or statistics
- ✅ Computing complex expressions with multiple operations
- ✅ Evaluating exponential growth and decay
- ✅ Checking hand calculations quickly
- ✅ Learning mathematical functions interactively
Frequently Asked Questions
What is the difference between log and ln?
log (or log₁₀) is the base-10 logarithm — the power to which 10 must be raised to get the number. log(1000) = 3 because 10³ = 1000. ln is the natural logarithm — base e (≈2.71828). ln(e³) = 3. Natural logs are used in calculus, physics, and continuous compounding finance formulas.
Why does the calculator use radians by default?
Radians are the natural mathematical unit for angles — defined as the arc length equal to the radius. Most mathematical formulas (calculus derivatives, Taylor series, physics) use radians. Degrees are more intuitive for everyday use. Our calculator has a toggle between degree and radian modes.
What is the order of operations (BODMAS/PEMDAS)?
Brackets (Parentheses) → Orders (Exponents) → Division & Multiplication (left to right) → Addition & Subtraction (left to right). So 2+3×4 = 2+12 = 14 (not 20). Always use parentheses if you're unsure: (2+3)×4 = 20. Our calculator follows standard mathematical order of operations.
How do I calculate compound interest using this calculator?
Use the formula A = P(1+r/n)^(nt): amount = principal × (1 + rate/compounding periods)^(compounding periods × years). For £1,000 at 5% compounded monthly for 3 years: 1000 × (1+0.05/12)^(12×3) = 1000 × 1.1614 = £1,161.40. Use the power (^) and parentheses functions.
What does the ANS button do?
The ANS (Answer) button recalls the result of your previous calculation, allowing you to chain calculations. For example: calculate 52 → press ANS in the next calculation to continue with 52 as the input. This avoids re-entering long numbers between sequential calculations.