Finelib Knowledge • Calculate • Check Prices • Find Businesses • Get Offers
Finelib Calculators
Construction & Building
Calculators › Construction & Building › Concrete Calculator

Concrete Calculator

Estimate wet concrete volume and indicative quantities of cement, sand and coarse aggregate for slabs, beams, columns and other rectangular concrete work.

Enter your concrete dimensions

Choose the concrete element, enter the dimensions, then click Calculate.

Waiting for calculation
—
Your concrete and material estimate will appear here after you click the button.
—50 kg cement bags
—sand
—coarse aggregate / granite
Finelib Prices

Check material prices

Carry the calculated cement, sand and aggregate quantities into supported current price intelligence.

Check current material prices →
Finelib Match

Find suppliers / Get Offers

Use the calculated material requirement to start a supplier enquiry.

Get Quotes or Offers →
Planning estimate, not structural design. The concrete grade, mix design, water-cement ratio, aggregate grading and reinforcement requirements must follow the project's engineering specification. Do not choose a structural concrete mix from this calculator alone.

Calculation basis

Volume is calculated from the entered dimensions. For the 1:2:4 estimating option, the material guide uses approximately 6.5 bags of 50 kg cement, 1.0 tonne of sand and 1.45 tonnes of coarse aggregate per cubic metre before the selected general wastage allowance. The Grade 25 guide uses approximately 7 bags of cement, 1.2 tonnes of sand and 1.4 tonnes of granite per cubic metre. The 1:2.5:3.5 option uses the published site-rate guide of approximately 7 bags, 1.089 tonnes of sand and 1.461 tonnes of granite per cubic metre.

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.

Finelib Knowledge Resources

Finelib PricesRequest Quotes or Offers via Finelib MatchConstruction & Building Calculators

Frequently Asked Questions

What does the Concrete 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.