Calculator
Free online calculator with basic and scientific functions, keyboard input, and local history.
0
History
- No calculations yet
When to Use This Calculator
Our free online calculator is perfect for a wide range of everyday and professional tasks:
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Shopping & Budgeting
Quickly calculate discounts, compare prices, split bills, or track your spending while shopping.
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Students & Homework
Solve math problems, check your work, and learn with scientific functions for algebra, trigonometry, and more.
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Professional Work
Handle business calculations, estimates, invoices, and financial planning with accuracy and speed.
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Cooking & Recipes
Scale recipe ingredients, convert measurements, and calculate cooking times for any serving size.
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DIY & Home Projects
Calculate dimensions, material quantities, paint coverage, and project costs for home improvements.
Frequently Asked Questions
- Is this calculator free to use?
- Yes. The calculator is free to use and does not require an account.
- Where are my calculations processed?
- After the page loads, calculations run locally in your browser. History is saved only in this browser's local storage until you clear it.
- What operations does this calculator support?
- The calculator supports basic arithmetic, percentages, parentheses, and scientific functions including trigonometry, logarithms, roots, powers, and constants.
- Can I use keyboard shortcuts?
- Yes. Use number keys 0-9, operators (+, -, *, /), Enter or = for results, Escape to clear, Backspace to delete, and the scientific shortcuts listed in the Help panel.
- Is my calculation history saved?
- Yes. Completed calculations are saved locally in this browser so you can recall them later, and you can clear that history at any time.
Calculator Help
Keyboard shortcuts
- 0-9
- Use number keys 0-9 for input
- + - * /
- Use +, -, *, / for operations
- ( )
- Use ( and ) for grouping
- Enter / =
- Press Enter or = for result
- Escape
- Press Escape to clear
- Backspace
- Press Backspace to delete
Scientific functions
- s c t
- sin, cos, tan functions
- l n
- log (base 10), ln (natural)
- r ^ !
- sqrt, power, factorial
- p e
- pi, e constants
- i d
- INV mode, DEG/RAD toggle
Features
- Basic arithmetic operations (+, -, x, /)
- Scientific functions (sin, cos, log, etc.)
- Parentheses for complex expressions
- Calculation history (stored locally)
- Copy the current result for reuse
- Local calculations in your browser