Free online calculators for percentages, discounts, dates, time, finance, and everyday calculations. Results update live as you type.
Whether you are comparing loan payments, figuring tips at a restaurant, or projecting compound growth, these calculators update as you type — no account and no data sent to a server. Pick a tool below for step-by-step fields and short FAQs.
Percentage CalculatorCalculate percentages, increases, decreases, and differences.
Discount CalculatorCalculate sale prices, discounts, and savings instantly.
Age CalculatorCalculate exact age in years, months, and days.
Date CalculatorCalculate the difference between dates or add and subtract days.
Time CalculatorAdd, subtract, and calculate hours, minutes, and seconds.
Loan CalculatorEstimate monthly payments and total loan costs.
Tip CalculatorCalculate tips and split bills quickly and easily.
BMI CalculatorCalculate body mass index using height and weight.
Salary CalculatorConvert between hourly, weekly, monthly, and annual salary.
Compound Interest CalculatorProject savings growth with principal, rate, years, and monthly contributions.
Sales Tax CalculatorAdd sales tax to any price with live subtotal, tax, and total.