What this calculator does
This is a complete scientific calculator that handles everything from basic arithmetic to advanced mathematical functions. You can compute trigonometric functions (sine, cosine, tangent), logarithms (natural and base-10), exponential operations, square roots, factorials, and combinations. It maintains a calculation history so you can review previous results, includes memory storage for saving values, and lets you control decimal precision by rounding to your chosen number of places.
How it works
Enter any valid mathematical expression using standard notation. The calculator parses your input and evaluates it according to order of operations (PEMDAS/BODMAS): parentheses first, then exponents and roots, then multiplication and division left-to-right, then addition and subtraction left-to-right.
You can use:
- Operators:
+,-,*,/,^(power) - Functions:
sin(),cos(),tan(),log()(base-10),ln()(natural log),sqrt(),abs(),!(factorial) - Constants:
π(pi ≈ 3.14159),e(Euler's number ≈ 2.71828) - Parentheses: for grouping operations
After calculation, round your result to a specific number of decimal places using the "Round to" setting. The calculator also stores your calculation history and provides memory buttons (M+, M−, MR, MC) for temporarily holding values during multi-step problems.
The formula
Result = Evaluate(Expression) rounded to n decimal places
Worked example
Problem: Find the sine of 45 degrees, add it to the natural logarithm of 10, then round to 4 decimal places.
Step 1: Convert 45° to radians (most calculators use radians for trig functions)
45° = 45 × (π/180) = 0.7854 radians
Step 2: Calculate sin(0.7854)
sin(0.7854) ≈ 0.7071
Step 3: Calculate ln(10)
ln(10) ≈ 2.3026
Step 4: Add the results
0.7071 + 2.3026 = 3.0097
Step 5: Round to 4 decimal places
Result: 3.0097
Expression entered: sin(45*π/180) + ln(10)
Round to: 4 decimal places
Another example: Calculate 2^8 + √144 − 5!
Step 1: 2^8 = 256
Step 2: √144 = 12
Step 3: 5! = 5 × 4 × 3 × 2 × 1 = 120
Step 4: 256 + 12 − 120 = 148
Result: 148
Expression entered: 2^8 + sqrt(144) - 5!
Round to: 0 decimal places (whole number)
Common mistakes to avoid
Angle units: Trigonometric functions expect radians, not degrees. If you have an angle in degrees, multiply by π/180 first. For example, use sin(30*π/180) for sin(30°), not sin(30).
Implicit multiplication: The calculator requires explicit operators. Write 2*3, not 2(3). Similarly, 2*sin(π), not 2sin(π).
Factorial limits: Factorials grow very quickly. Most calculators can't compute factorials larger than 170! without hitting overflow limits.
Logarithm domain: You cannot take the logarithm of zero or negative numbers. log(0) and ln(−5) will produce errors.
Division by zero: Expressions like 1/0 or tan(π/2) are undefined and will return an error.
Use parentheses liberally when combining functions. For instance, log(100*5) gives a different result than log(100)*5. The first evaluates log(500) ≈ 2.699; the second gives log(100) × 5 ≈ 10.