The formula for property rights of Men and Women under the Islamic inheritance laws:
Shares under the Islamic inheritance law depend on the closeness of relation to the deceased. Shares also differ when a person belongs to Sunni or Shia sect.

As Mother   1/6th of X (Total Wealth)

As wife      1/8th of X(Total Wealth) if she has any children
          1/4th of X (Total Wealth) if she does not have any children


As Daughter   ½ of brother’s share, if she has brothers    women having sisters
          Sunni/Hanafi - 2/3rd of X (Total Wealth) is divided equally among themselves
          Shia….total inheritance is equally divided among themselves
          Women having no siblings
          Sunni/Hanafi - 1/2 of X (Total Wealth)
          Shia- All property X(Total Wealth)