Paint Cost, Wall Brick & Concrete Mix (M20) Calculator

Using standard Nepali kiln bricks (9" × 4.5" × 2.75"), a 4.5-inch single-brick partition wall requires approximately 4.6 bricks per sq. ft., while a 9-inch outer load-bearing wall requires approximately 9.2 bricks per sq. ft. (plus 5% wastage buffer).

M20 grade concrete follows a nominal volumetric mix ratio of 1 : 1.5 : 3 (1 part OPC/PPC cement, 1.5 parts washed river sand, and 3 parts 20mm crushed stone aggregate/gitti), which is the mandatory minimum grade for residential RCC columns, beams, and slabs under Nepal’s NBC 105 seismic code.