Health & calculations

Convert height between metric units and imperial feet/inches.

Calculate days and streak duration since you quit a habit.

Calculate an estimated conception date by subtracting a standard pregnancy interval from your due date.

Convert dog age to an equivalent human age using a life-stage based formula.

Convert human years to cat years using a life-stage based formula.

Verify if a person meets an age requirement (18, 21, or custom) by entering their date of birth.

Work out how much fuel your car needs for a trip. Enter the distance and your consumption in L/100 km, km/L, or MPG to see the fuel, the cost, the refuel stops, and how high or low your fuel usage is.