Hi Prasad,

Unfortunately just knowing the lengths of the four sides is not enough information to determine the area. You need an angle measurement or perhaps the length of a diagonal. For example look at our response to Martha a while ago. She had a 5 sided lot but the same is true for a four sided lot. If you do know an angle measurement or the length of a diagonal you can use our 4-sided lot size tool to calculate the area.

Penny