When to use this
- You need exact arithmetic, fractions, roots, powers, trigonometry, or a school-style formula.
- You need to keep the expression visible while checking the final value.
Scientific Calculator
An online scientific calculator for trig, logs, powers, and roots. The expression line stays readable on mobile while you build the formula.
Expression: 0
Result: 0
0
0
Formula / focus
Keep parentheses, roots, trig, logs, and powers in one visible expression instead of splitting them into smaller manual steps.
Trig functions Logs Roots and powers Ans Deg/Rad
Decision Check Before Calculating
How it differs from nearby calculators
Math calculators preserve formula meaning. Use conversion pages for units and daily calculators for simple totals or estimates.
Common input mistakes
- Mixing DEG and RAD angle modes.
- Reading a decimal approximation as an exact fraction.
- Skipping parentheses around a numerator, denominator, or function argument.
How to read the result
- Check whether the result is exact, decimal, or approximate.
- For trig and powers, confirm the mode and parentheses before trusting the value.
Next action
- Use examples to test the same expression shape.
- Open the symbol guide if the blocker is entering √, π, °, or other symbols.
Related calculators
Examples, usage, and FAQ
Use this section before calculating to confirm whether this is the right calculator, how to enter the values, and what a result can and cannot tell you.
Overview
Use this calculator when the job needs scientific input on a small screen.
It keeps Ans recall, caret movement, implicit multiplication, history, and display preferences on your device.
How To Use It
- Build the expression with number, operator, and function keys.
- Move the caret when needed and switch Deg/Rad or use Ans.
- Press = to evaluate and reuse previous expressions from history.
FAQ
Q. When should I use DEG or RAD?
Use DEG for degree inputs such as sin(30). Use RAD when the angle already uses radians or π.
Q. What changes when I switch Decimal or Exact?
Decimal shows the numeric result. Exact shows a symbolic result such as 1/2, 2√2, or π/6 when that form is available.
Q. What does Ans use?
Ans refers to the most recent confirmed result and is restored from recent history after reloads.
Example Inputs
sin(30)
sin(30)
In DEG mode this should return 0.5.
√(81) + 2^3
√(81) + 2^3
A compact roots and powers example.
Ans × π
Ans × π
Continue from the last confirmed result.
Keyboard Shortcuts
0-9 / .
Numbers and decimal point
+ - * / ^ % ( )
Operators and parentheses
S / C / T / L / N / R
sin / cos / tan / log / ln / sqrt
P / E / A / D
π / e / Ans / Deg-Rad
ArrowLeft / ArrowRight
Move the caret
Enter / Backspace / Escape
Evaluate / delete / clear all
Read the calculator guide
See when to switch calculators, what the scientific calculator does well, and how symbol input works before the next calculation blocks on setup.
Order of operations basics
A beginner guide to order of operations covering 2 + 3 × 4, why it becomes 14 instead of 20, and how parentheses remove guesswork.
Common percentage mistakes for beginners
A beginner guide to percentage mistakes, including the difference between 10% off and a 10% markup, plus confusion around base value, rate, and percent-of questions.
Choose the right calculator
A practical guide to choosing between the basic calculator, scientific calculator, percentage tools, fractions, unit conversion, date difference, working hours, and age-on-date tools.
When scientific calculators help most
See when a scientific calculator is the right choice, what kinds of expressions it handles well, and how it differs from a basic calculator.
Math symbol input basics
Learn which math symbols are available directly in the site and which ones you may need to find through your OS or IME.