Calculators
Perform accurate calculations in seconds. Calculate percentages, compound interest growth, tip splits, body mass index (BMI), precise age, and state sales taxes with interactive charts.
Available Calculators
Showing 7 of 123 total toolsIncome Tax Calculator
Calculate take-home pay, progressive tax brackets, deductions, and net salary across 10 global economies with 5-year historical rules.
Percentage Calculator
Calculate percentage of a number, % increase/decrease, difference, reverse base, and discounts.
Tip & Bill Split Calculator
Calculate restaurant tips, split checks evenly, and customize rounding options.
Compound Interest Calculator
Calculate investment growth, interest earned, recurring deposits & yearly schedules.
BMI Calculator (Body Mass Index)
Calculate Body Mass Index, healthy weight range, and WHO classification.
Age & Date Calculator
Calculate exact chronological age, next birthday countdown, date duration, and date arithmetic.
Sales Tax Calculator
Calculate sales tax, total checkout price, and reverse pre-tax amounts with updated 2026 US state & local tax rates.