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Calculators › Construction & Building › Cost per m² Calculator

Construction Cost per m² Calculator

Calculate the effective construction cost per square metre from a project estimate, or use your own cost-per-m² assumption to create an early project budget.

Use building floor area, not plot/land area. For a multi-storey project, use the total applicable gross floor area across the floors included in the cost. Be consistent about what the project cost includes before comparing one project's ₦/m² with another.
Waiting for calculation
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Your construction cost result will appear here after you click the button.

—total floor area
—base construction amount
—allowances / contingency
—total analysed budget
Entered / derived rate—
Scope basis—
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Compare supported material and construction cost information where Finelib has current evidence.

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Use the floor area and budget basis to request suitable contractors and Quotes or Offers.

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Comparison boundary: Cost per m² is a broad budgeting and benchmarking measure, not a complete quotation. Rates can differ because of building type, location, specification, finish, height, structural system, ground conditions, services, external works, preliminaries, professional fees, taxes, inflation and what each estimate includes. Compare rates only on reasonably consistent scope and area definitions.

How the calculation works

Analysis mode divides the entered project cost by total applicable floor area. Budget mode multiplies total floor area by the user-entered cost-per-m² assumption, then adds optional allowances and contingency. No current Nigerian cost-per-m² rate is built into the calculator; market values should come from supported Finelib Prices evidence or a project-specific estimate.

How to Use and Check Your Result

Enter the measurements, quantities, costs and assumptions requested in the calculator above. Use its calculation control and review the displayed result. All figures should be checked against your actual project or operating conditions.

Planning and safety: Confirm measurements, local conditions, material specifications and professional requirements before purchase or construction. Finelib does not certify engineering designs or supplier quotations.

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Frequently Asked Questions

What does the Cost Per Square Metre Calculator estimate?

It estimates planning quantities or costs from the figures you enter. Review the calculator assumptions before using the result.

Can I use this calculator for a project in Nigeria?

Yes. Enter measurements and quotations relevant to your Nigerian location and project.

Does Finelib supply current market prices automatically?

No. Prices and rates should be checked with relevant suppliers; do not assume any illustrative values are live quotations.

Are the results guaranteed to be accurate?

No. The output depends on entered assumptions and is intended for preliminary planning, not professional certification.

How should I handle wastage or losses?

Where the calculator provides a wastage or contingency field, enter an allowance appropriate to the project. Otherwise account for it separately.

Can I use the result to request supplier quotes?

Yes. Use Finelib Match to find suitable businesses and request Quotes or Offers, then verify specifications and providers.

Should a professional review the result?

Yes, when the decision involves structural safety, electrical safety, major equipment, significant expenditure or regulatory requirements.