Scientific Calculator
Full-featured scientific calculator with trig, logarithms, and powers.
Keyboard supported. Use parentheses for grouped expressions and E for scientific notation.
Result
1
Expression entered
sin(90)
Angle mode
Degrees
Previous answer
1
Live evaluation
1
Expression History
Recent calculations appear here.
Scientific Function Guide
sin, cos, tan
Trigonometric functions depend on degree or radian mode.
log and ln
log is base 10. ln is base e.
Powers and roots
^ raises a number to a power. √ reverses squaring.
π and e
π is approximately 3.14159. e is approximately 2.71828.
Factorial
n! multiplies whole numbers from n down to 1.
Scientific notation
E notation writes very large or small numbers compactly.
Parentheses
Parentheses control calculation order.
Formula and Function Rules
Powers
x^n means x multiplied by itself n times.
Square Root
√x is the value that squares to x.
Logarithm
log(x) usually means base 10.
Natural Log
ln(x) means base e.
Trigonometry
sin, cos, and tan depend on the selected angle mode.
Scientific Notation
a × 10^n writes very large or small numbers compactly.
Parentheses
Parentheses control calculation order.
Angle Modes: Degrees vs Radians
Degrees
Degrees measure a full circle as 360°. Many school geometry problems use degrees. Example: sin(90°) = 1.
Radians
Radians measure a full circle as 2π. Calculus and advanced math often use radians. Example: sin(π/2) = 1.
Worked Examples
2 + 3 × 4
Rule: Order of operations
Step: 3 × 4 first
Answer: 14
Multiplication happens before addition.
(2 + 3) × 4
Rule: Parentheses
Step: 2 + 3 first
Answer: 20
Parentheses override the normal order.
2^5
Rule: Power
Step: 2 multiplied by itself 5 times
Answer: 32
Powers represent repeated multiplication.
√(144)
Rule: Square root
Step: Value that squares to 144
Answer: 12
12² = 144.
log(1000)
Rule: Base-10 logarithm
Step: 10³ = 1000
Answer: 3
log asks what power of 10 gives the input.
ln(e)
Rule: Natural logarithm
Step: e¹ = e
Answer: 1
ln uses base e.
sin(90)
Rule: Trigonometry in degrees
Step: sin(90°)
Answer: 1
In degree mode, sin(90°) = 1.
sin(π÷2)
Rule: Trigonometry in radians
Step: sin(π/2)
Answer: 1
In radian mode, π/2 radians equals 90°.
1.2E6
Rule: Scientific notation
Step: 1.2 × 10⁶
Answer: 1,200,000
E notation writes large numbers compactly.
5!
Rule: Factorial
Step: 5 × 4 × 3 × 2 × 1
Answer: 120
Factorial is repeated multiplication of positive integers.
Order of Operations and Parentheses
Parentheses first
Powers and roots
Multiplication and division
Addition and subtraction
Example: 2 + 3 × 4 = 14, not 20. Use parentheses whenever the intended grouping is unclear.
Common Scientific Calculator Mistakes
Understanding Your Result
Arithmetic result
The evaluated expression after applying operation order.
Power result
Repeated multiplication.
Root result
A value that reverses a power.
Log result
The exponent needed to reach a number.
Trig result
A ratio based on the selected angle mode.
Scientific notation
Compact representation of a large or small value.
Error state
The expression cannot be evaluated safely.