Conversions & Time calculators

Length, weight, temperature, volume, speed, cooking and data-size converters, plus age, date, time, fuel, electricity and unit-price calculators.

• Age CalculatorExact age in years, months and days from a date of birth, plus total days, weeks and months and the next birthday.
• Cooking Measurement ConverterConvert cups, tablespoons, teaspoons, fluid ounces, pints, quarts and gallons to milliliters and liters, exact and recipe-rounded.
• Data Storage ConverterConvert bits, bytes, KB, MB, GB, TB and the binary KiB, MiB, GiB, TiB, and see why a 1 TB drive shows 931 GB.
• Date Difference Calculator (Days Between Dates)Count the days, weeks, months and business days between two dates, or add or subtract days, weeks, months or years from a date.
• Electricity Cost CalculatorCost to run an appliance from its watts, hours of use and your electricity rate, per hour, day, month and year.
• Fuel Cost Calculator (Gas Trip Cost)Fuel cost of a trip from distance, fuel economy and gas price, with round trip, cost split and cost per mile.
• Length ConverterConvert between inches, feet, yards, miles, nautical miles, millimeters, centimeters, meters and kilometers.
• Military Time Converter (24-Hour Clock)Convert standard 12-hour a.m./p.m. time to military (24-hour) time and back, with a full chart.
• MPG Calculator (Gas Mileage)Calculate your car's miles per gallon from a fill-up and convert MPG to L/100 km, km/L and UK mpg.
• Speed ConverterConvert miles per hour, kilometers per hour, meters per second, knots and feet per second.
• Temperature ConverterConvert Fahrenheit, Celsius, Kelvin and Rankine with the exact formulas, plus an oven temperature chart.
• Time Duration Calculator (Hours Between Two Times)Hours and minutes between a start and end time, minus breaks, with decimal hours for timesheets and overnight shifts.
• Unit Price CalculatorCompare two or three products by price per ounce, pound, gram, liter, fluid ounce or item to find the better buy.
• Volume ConverterConvert gallons, quarts, pints, cups, fluid ounces, tablespoons and teaspoons to liters and milliliters, plus cubic inches, feet and meters.
• Weight ConverterConvert pounds, ounces, stones and tons to kilograms, grams and tonnes, and back, with exact factors.