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import streamlit as st
# Constants
BRICK_VOLUME_CFT = (9/12) * (4.5/12) * (3/12) # in cubic feet
CEMENT_SAND_RATIO = 1 / 6 # Cement in 1:6 mortar
SAND_RATIO = 5 / 6 # Sand in 1:6 mortar
CEMENT_DENSITY_KG_PER_CFT = 1440 / 35.3147 # kg/cft approx
CEMENT_BAG_WEIGHT_KG = 50
st.set_page_config(page_title="Brick, Cement & Sand Estimator", page_icon="🏗️")
st.title("🏗️ Brick, Cement & Sand Estimation App")
st.header("📏 Room Dimensions (in feet)")
length = st.number_input("Room Length", min_value=1.0)
width = st.number_input("Room Width", min_value=1.0)
height = st.number_input("Room Height", min_value=1.0)
wall_thickness = st.number_input("Wall Thickness", value=0.75, help="Typically 0.75 feet for 9-inch walls")
st.header("🚪 Openings (Doors, Windows, Others)")
num_openings = st.number_input("Total Number of Openings", min_value=0, step=1)
openings = []
for i in range(num_openings):
st.subheader(f"Opening #{i+1}")
o_length = st.number_input(f"Length of Opening #{i+1} (ft)", min_value=0.0, key=f"length_{i}")
o_height = st.number_input(f"Height of Opening #{i+1} (ft)", min_value=0.0, key=f"height_{i}")
has_beam = st.checkbox(f"Add Beam Over Opening #{i+1}?", value=True, key=f"beam_{i}")
openings.append({
"length": o_length,
"height": o_height,
"has_beam": has_beam
})
st.header("🧱 Estimation Result")
if st.button("Estimate Quantities"):
# Total wall volume
wall_area = 2 * (length + width) * height
wall_volume = wall_area * wall_thickness
total_opening_volume = 0
total_beam_volume = 0
for op in openings:
vol = op["length"] * op["height"] * wall_thickness
total_opening_volume += vol
if op["has_beam"]:
beam_length = op["length"] + 1 # 1 ft extra
beam_volume = beam_length * 0.75 * 0.75 # 9"x9" beam in ft
total_beam_volume += beam_volume
net_volume = wall_volume - total_opening_volume - total_beam_volume
# Brick calculation
number_of_bricks = net_volume / BRICK_VOLUME_CFT
number_of_bricks = round(number_of_bricks * 1.05) # 5% waste
# Mortar volume (25% of brickwork volume)
mortar_volume = net_volume * 0.25
# Cement and sand volumes
cement_volume = mortar_volume * CEMENT_SAND_RATIO
sand_volume = mortar_volume * SAND_RATIO
# Cement in bags
cement_bag_volume_cft = CEMENT_BAG_WEIGHT_KG / CEMENT_DENSITY_KG_PER_CFT
cement_bags = cement_volume / cement_bag_volume_cft
cement_bags = round(cement_bags)
st.subheader("📊 Estimated Quantities:")
st.write(f"🧱 **Bricks Needed:** {number_of_bricks:,} bricks")
st.write(f"🏖️ **Sand Needed:** {sand_volume:.2f} cft")
st.write(f"🪣 **Cement Needed:** {cement_bags} bags (50kg each)")
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