When to Use This Calculator

Our free online calculator is perfect for a wide range of everyday and professional tasks:

Shopping & Budgeting
Quickly calculate discounts, compare prices, split bills, or track your spending while shopping.
Students & Homework
Solve math problems, check your work, and learn with scientific functions for algebra, trigonometry, and more.
Professional Work
Handle business calculations, estimates, invoices, and financial planning with accuracy and speed.
Cooking & Recipes
Scale recipe ingredients, convert measurements, and calculate cooking times for any serving size.
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, our online calculator is completely free with no registration required. Use it as many times as you need for any calculations.
Does the calculator work offline?: Once the page is loaded, the calculator works entirely in your browser. Your calculations are processed locally and never sent to any server.
What operations does this calculator support?: Our calculator supports basic arithmetic (addition, subtraction, multiplication, division), percentages, parentheses for complex expressions, and scientific functions including trigonometry, logarithms, square roots, and powers.
Can I use keyboard shortcuts?: Yes! Use number keys 0-9, operators (+, -, *, /), Enter or = for results, Escape to clear, and Backspace to delete. The calculator is fully keyboard accessible.
Is my calculation history saved?: Yes, your calculation history is saved locally in your browser. It persists between sessions and is never shared. You can clear it anytime using the clear history button.