Converters & Everyday Calculators

Numbers to Roman numerals and back.

Convert between binary, decimal, hex and octal.

Exact age in years, months and days.

Days, weeks and weekdays between two dates.

Time between clock times, add or subtract durations.

Length, weight, area and volume in one place.

Feet, inches, metres, km, miles and more.

kg, pounds, grams, tola and maund.

Celsius, Fahrenheit and Kelvin.

Sq ft, m², sq yd, acres, hectares.

Litres, gallons, m³, cups and spoons.

km/h, mph, m/s, knots and Mach.

Bytes, KB, MB, GB, TB and GiB.

Date after adding or subtracting days.

Find speed, distance or travel time.

Petrol cost for any trip.