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Bill of Quantity Formula:
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Bill of Quantity (BOQ) is a document used in construction and procurement that lists the quantities of materials, parts, and labor required to complete a project. It provides a detailed breakdown of all items needed along with their respective quantities and rates.
The calculator uses the Bill of Quantity formula:
Where:
Explanation: The formula calculates the total cost by multiplying the quantity of each item by its unit rate. For multiple items, the sum of all individual item totals gives the overall project cost.
Details: Accurate BOQ calculation is essential for project budgeting, cost estimation, tender preparation, and financial planning. It helps in comparing contractor bids and controlling project costs throughout the construction process.
Tips: Enter the item quantity in units and the item rate in currency per unit. Both values must be positive numbers. The calculator will compute the total cost for the specified quantity at the given rate.
Q1: What is the difference between BOQ and BOM?
A: BOQ (Bill of Quantity) focuses on quantities and costs for tendering and contracting, while BOM (Bill of Materials) lists materials needed for manufacturing or construction without pricing.
Q2: How accurate should BOQ calculations be?
A: BOQ calculations should be as accurate as possible, typically within 5-10% variance, as they form the basis for project budgeting and contractor payments.
Q3: What units are commonly used in BOQ?
A: Common units include cubic meters (m³), square meters (m²), meters (m), kilograms (kg), numbers (nos), and hours for labor.
Q4: Can BOQ be modified during a project?
A: Yes, BOQ can be modified through variation orders when there are changes in project scope, design modifications, or unforeseen site conditions.
Q5: Who prepares the Bill of Quantity?
A: Typically prepared by quantity surveyors, cost consultants, or architects during the design and tender stage of a construction project.