Unit converter, timestamp, number base and percentage calculators.
Convert length, weight, temperature, area and volume units.
Convert Unix timestamps to human-readable dates and back.
Convert numbers between binary, octal, decimal and hexadecimal.
Calculate percentages: X% of Y, X is what % of Y, percentage change.
Calculate exact age in years, months, days from a birthdate.
Calculate the difference between two dates in various units.
