4 tools
Calculators
Quick, transparent calculators for math that comes up constantly but isn't worth opening a spreadsheet for — working out a percentage, splitting a bill with tip included, or similar everyday arithmetic. Every result shows the formula used, not just an answer.
Tools
Percentage Calculator01Calculate percentages, percentage change, and percentage difference.Tip Calculator02Calculate a tip and split the total across any number of people.Age Calculator03Calculate exact age in years, months, and days between two dates.Date Calculator04Find the difference between two dates, or add/subtract time from a date.