Fast, Accurate Online Calculators for Everyday Math

Do quick math with our basic calculator, or solve real-life problems with percentage, age, BMI, discount, tip, loan, interest and date tools.

Use the calculator ↓ Browse calculators

⚡ Loads fast🔒 Calculations stay in your browser📱 Works on mobile

Why CalcHub?

Clean keypad with keyboard support and history.
Useful tools for everyday calculations.
No signup required.

Basic Calculator

Supports +, -, ×, ÷, %, decimals and parentheses. Press Enter for =, Backspace to delete, Esc to clear.

History (saved on this device)

Popular calculators

📊 Percentage Calculator

Find percentages and percentage changes.

Open →

🎂 Age Calculator

Calculate age in years, months and days.

Open →

⚖️ BMI Calculator

Calculate Body Mass Index.

Open →

🏷️ Discount Calculator

Calculate sale price and savings.

Open →

💰 Tip Calculator

Calculate tip and split a bill.

Open →

🏦 Loan Calculator

Estimate monthly loan payments.

Open →

📈 Simple Interest

Calculate simple interest and total amount.

Open →

📊 Compound Interest

Calculate compound growth.

Open →

📅 Date Calculator

Calculate differences between dates.

Open →

How to use the basic calculator

Tap or type your expression, for example 1250*0.15.
Press = or Enter. Use ⌫ to delete and AC to start over.
Use Copy result to copy your answer.

Order of operations

The calculator follows standard mathematical priority: parentheses, percentages, multiplication/division, then addition/subtraction.

Frequently asked questions

Is this calculator free?

Yes. The calculator is free and requires no signup.

Does my calculation data leave my device?

No. History is stored in your browser's local storage.

Why does it show Cannot divide by zero?

Division by zero is undefined, so the calculator displays an error.

Can I use the keyboard?

Yes. Digits, +, -, *, /, %, ., parentheses, Enter, Backspace and Escape are supported.