Conversion Calculator Enter the number of units your want to convert to or from and choose the type of conversion. NumberUntitledInches to MillimetresSecond ChoiceThird ChoiceNumber British Thermal Unit (BTU) Calculator Choose your room, glazing type and the unit of measurements then enter the width, length and height of your room to find out the total BTU requirement. RoomFirst ChoiceSecond ChoiceThird ChoiceDoor/Window GlazingFirst ChoiceSecond ChoiceThird ChoiceMeasurement UnitsFirst ChoiceSecond ChoiceThird ChoiceWidth (m)Length (m)Height (m)
