A material estimate starts with your measurements and a clear formula. These tools provide planning figures, not structural design, product recommendations or construction approval.
Use the paint quantity calculator to turn measured wall dimensions, door and window openings, coverage and coats into a litre and tin estimate. Check the paint label and add an allowance for the actual surface before ordering.
Use the concrete volume calculator to add rectangular or cylindrical components, apply one visible allowance and compare separately labelled ready-mix or bag estimates. Confirm measurements and supplier requirements before ordering.
Estimate litres from wall dimensions, coverage, and coats.
Open tool
Calculate material volume for slabs, cylinders, and footings.
Open tool
Calculate radius, diameter, circumference and area with linear/squared units and unrounded JSON export.
Open tool
Calculate percent of, ratios, changes, increases, decreases and symmetric differences with exact arithmetic.
Open toolConcrete volume does not determine reinforcement, strength, footing design, site preparation or regulatory approval. Use a qualified professional for those decisions.
Record each form's actual length, width, depth or diameter first. An allowance is a planning adjustment for the total material estimate, not a substitute for checking dimensions or a supplier's ordering rules.
Your tool inputs stay in your browser. Optional analytics track these page visits only, not your files or text. Privacy.