Create app.py

app.py

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+import streamlit as st
+
+# Set page config
+st.set_page_config(page_title="Slab Concrete Calculator", layout="centered")
+st.title("🧱 Slab Concrete Calculator")
+
+# Units selection
+unit = st.selectbox("Select unit for dimensions:", ["m", "cm", "mm"])
+
+# Input fields
+col1, col2, col3 = st.columns(3)
+with col1:
+    length = st.number_input("Length (L)", min_value=0.0, format="%.2f")
+with col2:
+    width = st.number_input("Width (W)", min_value=0.0, format="%.2f")
+with col3:
+    thickness = st.number_input("Thickness (T)", min_value=0.0, format="%.2f")
+
+# Convert all dimensions to meters
+conversion_factor = {"m": 1, "cm": 0.01, "mm": 0.001}
+factor = conversion_factor[unit]
+length_m = length * factor
+width_m = width * factor
+thickness_m = thickness * factor
+
+# Concrete Ratio Inputs
+st.markdown("### 🧮 Concrete Mix Ratio")
+col1, col2, col3 = st.columns(3)
+with col1:
+    cement_ratio = st.number_input("Cement", min_value=0.0, value=1.0)
+with col2:
+    sand_ratio = st.number_input("Sand", min_value=0.0, value=2.0)
+with col3:
+    aggregate_ratio = st.number_input("Aggregate", min_value=0.0, value=4.0)
+
+total_ratio = cement_ratio + sand_ratio + aggregate_ratio
+
+# Additional inputs
+cement_bag_weight = st.number_input("Cement Bag Weight (kg)", value=50.0)
+cement_bag_price = st.number_input("Cement Bag Price ($)", value=0.0)
+water_cement_ratio = st.number_input("Water-Cement Ratio", value=0.5)
+concrete_price = st.number_input("Concrete Price per m³ ($)", value=0.0)
+
+# Calculate button
+if st.button("Calculate"):
+    # Step 1: Concrete Volume
+    concrete_volume = length_m * width_m * thickness_m
+
+    # Step 2: Dry volume
+    dry_volume = concrete_volume * 1.54
+
+    # Step 3: Material Volumes
+    cement_volume = (cement_ratio / total_ratio) * dry_volume
+    sand_volume = (sand_ratio / total_ratio) * dry_volume
+    aggregate_volume = (aggregate_ratio / total_ratio) * dry_volume
+
+    # Step 4: Cement weight & bags
+    cement_density = 1440  # kg/m³
+    cement_weight = cement_volume * cement_density
+    cement_bags = cement_weight / cement_bag_weight
+
+    # Step 5: Water
+    water_liters = cement_weight * water_cement_ratio
+
+    # Step 6: Costs
+    cement_cost = cement_bags * cement_bag_price
+    total_concrete_cost = concrete_volume * concrete_price
+    concrete_weight = cement_weight + (sand_volume + aggregate_volume) * 1600  # estimated total mass
+
+    # Results
+    st.markdown("### 📊 Results")
+    st.write(f"**Concrete Volume:** {concrete_volume:.2f} m³")
+    st.write(f"**Dry Concrete Volume:** {dry_volume:.2f} m³")
+    st.write(f"**Cement Volume:** {cement_volume:.2f} m³")
+    st.write(f"**Cement Weight:** {cement_weight:.2f} kg")
+    st.write(f"**Cement Bags:** {cement_bags:.2f} bags")
+    st.write(f"**Sand Volume:** {sand_volume:.2f} m³")
+    st.write(f"**Aggregate Volume:** {aggregate_volume:.2f} m³")
+    st.write(f"**Water Required:** {water_liters:.2f} liters")
+    st.write(f"**Cement Cost:** ${cement_cost:.2f}")
+    st.write(f"**Concrete Cost:** ${total_concrete_cost:.2f}")
+    st.write(f"**Estimated Concrete Weight:** {concrete_weight:.2f} kg")