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import streamlit as st
st.set_page_config(page_title="🧱 Block Quantity Calculator", layout="centered")
st.title("🧱 Block Quantity Calculator with Formula Explanation")
unit = st.selectbox("Choose Unit", ["m", "cm"])
def convert(val):
return val / 100 if unit == "cm" else val
# Wall Dimensions
st.subheader("Wall Dimensions")
L = convert(st.number_input("Wall Length", value=0.0))
H = convert(st.number_input("Wall Height", value=0.0))
T = convert(st.number_input("Wall Thickness", value=0.0))
# Block Dimensions
st.subheader("Block Dimensions")
BL = convert(st.number_input("Block Length", value=0.0))
BH = convert(st.number_input("Block Height", value=0.0))
BW = convert(st.number_input("Block Width", value=0.0))
# Mortar Ratio
st.subheader("Cement-Sand Ratio")
cement = st.number_input("Cement Ratio", value=1.0)
sand = st.number_input("Sand Ratio", value=2.5)
ratio_sum = cement + sand
# Additional Inputs
st.subheader("Additional Inputs")
deduct_area = st.number_input("Deducted Area (e.g., doors/windows) in m²", value=0.0)
block_price = st.number_input("Block Price (optional)", value=0.0)
if st.button("Calculate"):
wall_vol = (L * H * T) - deduct_area
block_vol = BL * BH * BW
num_blocks = wall_vol / block_vol
dry_mortar = wall_vol * 0.21
cement_vol = dry_mortar * (cement / ratio_sum)
sand_vol = dry_mortar * (sand / ratio_sum)
cement_bags = cement_vol / 0.0347
cost = num_blocks * block_price
st.markdown("## 📘 Calculation Breakdown")
st.markdown(f"""### 🧱 Wall Volume
**Formula:** `Length × Height × Thickness - Deducted Area`
**=** {L:.2f} × {H:.2f} × {T:.2f} - {deduct_area:.2f}
**= {wall_vol:.2f} m³**
### 🧱 Block Volume
**Formula:** `Length × Height × Width`
**=** {BL:.2f} × {BH:.2f} × {BW:.2f}
**= {block_vol:.4f} m³**
### 🔢 Number of Blocks
**Formula:** `Wall Volume ÷ Block Volume`
**=** {wall_vol:.2f} ÷ {block_vol:.4f}
**= {num_blocks:.0f} blocks**
### 🧪 Dry Mortar Volume
**Formula:** `Wall Volume × 0.21`
**=** {wall_vol:.2f} × 0.21
**= {dry_mortar:.2f} m³**
### 🧱 Cement & Sand Volume
**Cement Volume:** {dry_mortar:.2f} × ({cement} / {ratio_sum}) = {cement_vol:.2f} m³
**Sand Volume:** {dry_mortar:.2f} × ({sand} / {ratio_sum}) = {sand_vol:.2f} m³
### 🧱 Cement Bags
**Formula:** `Cement Volume ÷ 0.0347`
**=** {cement_vol:.2f} ÷ 0.0347
**= {cement_bags:.0f} bags**
### 💰 Total Cost (Optional)
**Formula:** `Number of Blocks × Block Price`
**=** {num_blocks:.0f} × {block_price:.2f}
**= ${cost:.2f}**
""")
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