Nail and screw count
Estimate fasteners from support intersections, panel quantity, spacing, allowance, and optional pack size.
Practical material calculators and estimating guides
RoxyCalc helps DIY users and tradespeople plan flooring, paint, concrete, fencing, decking, drywall, tile, pavers, sheets, fasteners, trim, and bulk materials. Each calculation explains its inputs, assumptions, rounding, and result breakdown.
Choose a calculator
Start with the material you are buying. If one quantity drives another, follow the related links on the result page.
Sheet count
Compare simple area division with a row-layout count before adding stagger and allowance.
Paint quantity
Estimate paintable area, opening deductions, coats, coverage, and whole containers.
Concrete bags
Calculate slab, trench, hole, or pier volume, bag yield, allowance, and whole bags.
Flooring packs
Turn room area, pattern allowance, and pack coverage into a pack purchase estimate.
Bulk material volume
Estimate mulch, soil, gravel, or sand from the footprint, finished depth, and order unit.
Tiles and boxes
Plan tile count and whole boxes using tile size, pattern allowance, and box coverage.
Decking boards
See how board width, gap, direction, stock length, and waste affect board rows.
Fence materials
Estimate bays, posts, rails, pickets, optional concrete, and fasteners for a straight run.
Drywall wall sheets
Compare a walls-only area estimate with a simple sheet layout before purchase rounding.
Pavers, base, and bedding
Keep paver, bedding, and base quantities separate for a rectangular patio or path.
Skirting and trim
Estimate perimeter, openings, waste, stock lengths, and optional fasteners without hiding cut-plan limits.
The calculators run in the browser and do not require an account or saved project.
How RoxyCalc calculates
1. Enter the job dimensions
Use measurements from the real room, wall, run, or layer and select the matching units.
2. Apply material-specific logic
RoxyCalc normalises supported units and uses a documented formula for the chosen material.
3. Make the purchase quantity visible
Allowance and whole-pack, bag, board, sheet, box, or container rounding are shown in the breakdown.
Use a calculator as a planning check
Compare the result with the physical project and the product information. If a result looks too low or high, recheck units, dimensions, depth, coverage, allowance, and purchase-unit size.
See what is assumed
Every calculator lists a plain-language breakdown, and the methodology documents input meanings, formulas, rounding, defaults, and limits for all tools.
Help improve an estimate
RoxyCalc is published by XiriusAI. Report a calculation issue, unclear explanation, content correction, or broken link with the page and the values you entered.