Use our online stress calculator to find the stress of any material by entering the force and area. Stress is a physical quantity and its expressed as force per unit area. The maximum stress a material can withstand before it breaks is called as breaking stress. It is a internal force that the particles within the material exert on each other. It is measured in the same units as similar to pressure. Stress level varies both with the direction and surface acting on it. The given stress calculator helps you estimate the maximum stress a material can withstand from the known values.