Online Calculators
Free, fast, and accurate mathematical calculators for everyday use
Age Calculator
Calculate your exact age in years, months, and days
Percentage Calculator
Calculate percentages, percentage change, and more
Sales Tax Calculator
Calculate tax amount and total price including tax
Discount Calculator
Calculate sale price and savings after discount
Probability Calculator
Calculate probability of single and multiple events
📐 Quick Mathematical Formulas
Percentage:
% of number = (percentage × number) ÷ 100
Average:
Mean = Sum of numbers ÷ Count of numbers
Discount:
Final Price = Original - (Original × Discount%)
Sales Tax:
Total = Amount + (Amount × Tax Rate)
Probability:
P(A) = Favorable Outcomes ÷ Total Outcomes
Age:
Age = Current Date - Birth Date
Fast & Reliable
All tools process instantly without any delay
Secure & Private
No data storage, all processing happens in your browser
Mobile Friendly
All tools work perfectly on all devices