Scientific Calculator
Evaluate an expression with trig, log, powers and roots.
Inputs
- Expression
- Angle mode
Notes and assumptions
- Supports + − × ÷ ^ (power), parentheses, pi, e, and sin/cos/tan/asin/acos/atan/sqrt/log/ln/abs/exp.
What it does
Evaluates a typed expression with powers, roots, logarithms and trigonometry.
Where it's used
Quick engineering arithmetic without leaving the page.
How to use it
- Type the expression, e.g.
2*pi*50*0.1. - Choose degrees or radians for trig functions.
- Read the result.
The formula explained
- ^
- power
- sqrt()
- square root
- log()
- base-10 logarithm
- ln()
- natural logarithm
- pi, e
- constants
Worked example
Inputs:
- Expression: sqrt(3^2 + 4^2)
- Angle mode: Degrees
The calculator gives:
- Result: 5
Tips and common mistakes
- Use brackets to make the order of operations clear.
- Check the angle mode before using sin, cos and tan.
- Type
*for multiply.
Questions people ask
Why does sin(30) give −0.988 instead of 0.5?
The angle mode is set to Radians, so the calculator works out the sine of 30 radians. Switch the mode to Degrees and sin(30) gives 0.5.
What is the difference between log and ln?
log is the base-10 logarithm, so log(1000) = 3. ln is the natural logarithm, to base e ≈ 2.71828, so ln(e) = 1. Use log for decibels and pH, and ln for exponential growth, decay and RC charging.
How do I type powers and other roots?
Use ^ for powers: 2^10 = 1024. Square roots have their own function, sqrt(x). For any other root, raise to a fractional power in brackets: the cube root of 27 is 27^(1/3) = 3.
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Enter your values to get the result with the formula, substituted values and an explanation of each step.