mantools Online Calculator - Standard & Scientific Tool
Free, easy-to-use online calculator supporting basic arithmetic, trigonometric functions, logarithms, powers, roots, and more. Works on desktop and mobile, supports keyboard input, paste expression, and copy result.
Supports keyboard input | Press Enter to calculate | Paste expression | Click result to copy
On mobile: tap expression to move cursor, use on-screen buttons, text box auto-expands
Calculator Features
The mantools online calculator has two modes: Standard and Scientific, perfect for everyday calculations, student math, engineering tasks, etc. No download required—works instantly in your browser.
1. Standard Calculator
- Basic arithmetic: addition, subtraction, multiplication, division, percentage
- Common operations: square, cube, exponentiation, square root
- Convenient controls: clear, backspace, parentheses for expression priority
2. Scientific Calculator
- Trigonometric functions: sin, cos, tan, and inverse functions asin, acos, atan
- Logarithmic functions: natural log (ln), common log (log)
- Constants: π (pi), e (Euler's number)
- Advanced math: square root, power, nested parentheses
3. Usage Tips
- Use computer keyboard to input numbers and operators; press Enter for instant calculation
- Paste a copied mathematical expression directly into the input field
- Click the result area to copy the numeric value to clipboard
- Freely move cursor inside expression, use backspace to precisely delete characters
- Works on mobile, tablet, and desktop – landscape and portrait modes supported
4. Common Math Formulas
1. Trigonometric: asin(0.5), cos(π/6), atan(2) – all can be computed directly
2. Logarithmic: log(2) gives common logarithm, ln(2) gives natural logarithm
3. Exponentiation: use ^ to represent power, e.g., 2^3 calculates 2 to the power of 3
