Free Online Calculators & Tools

Calculate exact age in years, months, days, and total elapsed days.

Calculate a sale price, savings, and optional additional discount.

Calculate percentages, proportions, and percentage change with a clear formula breakdown.

Find the calendar and total-day difference between two dates.

Calculate a value after a percentage increase and see the exact increase amount.

Calculate a tip, total bill, split per person, and common tip comparisons.