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How much do I need?
Island-standard factors, instant answers, one tap to cart. No reloads, no spreadsheets.
Concrete slab
bags of mix — 45 bags ≈ 1 cu yd (80 lb)
≈ 1.48 cu yd → 67 bags
Concrete Mix High-Strength 4000 psi — 80 lb bag
67 bags for 12×10 ft at 4" · ≈ KYD 904.50
Block wall
8×8×16 CMU — 1.125 blocks per sq ft + mortar
≈ 270 blocks · 8 bags mortar
CMU Block Standard 8×8×16
270 blocks for 30×8 ft · ≈ KYD 918.00
Concrete Mix High-Strength 4000 psi — 80 lb bag
8 bags mortar · ≈ KYD 108.00
Rebar for a slab
#4 bar grid · 20 ft lengths · 5% lap allowance
≈ 196 ft → 11 × 20 ft bars
Rebar Grade 60 #4 (1/2") — 20 ft
11 bars at 16" grid · ≈ KYD 129.80
Paint
≈ 350 sq ft per gallon per coat
≈ 3 gallons
Paint Elastomeric Exterior White — 5 gal
3 gal for 400 sq ft × 2 · ≈ KYD 690.00
Stud framing
studs on center + 3 plates per run (8 ft lengths)
≈ 16 studs + 9 plate lengths
Lumber PT Southern Pine 2×4 — 16 ft
16 studs + 9 plates · ≈ KYD 362.50
Rules of thumb, not engineering.
Estimates use standard island factors (45 bags/cu yd, 1.125 block/sq ft, 350 sq ft/gal). For structural work, send the drawings on WhatsApp — a supplier counter-checks the takeoff free with any quote.