This calculator is provided by constructionmethodology.com for preliminary construction methodology planning.
- Indicative only. All quantities, durations, energy figures and costs are estimates derived from user inputs and industry rule-of-thumb factors (waste, bulking, coverage, productivity).
- Not professional advice. Outputs do not constitute engineering design, quantity surveying, fire engineering, electrical design or financial advice.
- Verify before use. Confirm all values against project drawings, specifications, geotechnical data, manufacturer literature and applicable standards (e.g. NCC, AS/NZS series) before ordering materials, pricing works or committing to programme.
- Fire & life-safety values (extinguishers, sprinklers, detectors, egress) are counting aids only — layouts must be designed and certified by qualified practitioners.
- Rates & currency. Cost outputs simply multiply your entered rates; the currency setting changes the display symbol only, with no exchange conversion.
- No liability. To the extent permitted by law, no responsibility is accepted for loss arising from reliance on these outputs.
- Licence & copyright. This calculator and its code, layout and reference data are © constructionmethodology.com. You may use the live tool for project planning. You may not copy, scrape, re-host, resell or white-label it without written permission.
Editable factors (waste %, bulking, coverage, productivity) should always be adjusted to your site conditions.