Converts between units in nine categories: Length (mm to miles), Weight/Mass (mg to tonnes), Temperature (°C, °F, K), Volume (ml to gallons), Area (cm² to acres), Speed (mph to km/h), Pressure (Pa to psi), Energy (J to kWh), and Data Storage (KB to TB). All categories are supported simultaneously with instant conversion.
Select a category, enter a value in any unit, and see all other units updated instantly.
Format numbers with locale-specific separators, currency, and scientific notation.
Calculate percentages, percentage change, and percentage of a total.
Calculate the number of days, weeks, or months between two dates.
Calculate exact age from a date of birth to today or a specific date.
Calculate mean, median, mode, standard deviation, and more from a dataset.
Generate Fibonacci sequences up to N terms or up to a maximum value.