Ibs to Kilograms divide by 2.205
Kilograms to lbs multiply by 2.205
tons to tonnes multiply by  1.016
tonnes to tons divide by  1.016
cwts to kilograms multiply by 50.794
kilograms to cwts divide by 50.794 


acres to hectares divide by 2.471
hectares to acres multiplyby 2.471
square yards to square metres multiply by 0.8361
square metres to square yards divide by 0.8361