Free tools for DIYers & contractors
Measure
twice.
Buy once.
Straightforward calculators for the projects that actually happen on a Saturday. Pick a tool, punch in numbers, get the answer. No signups, no email walls.
- TOOL_01
Paint
Gallons per room
350sq ft / gal
Walls, doors, windows, coats, ceiling — get gallons and that awkward extra quart.
Calculate paint → - TOOL_02
Mulch
Bags or bulk yards
27cu ft / yd
Beds by size or square footage, 2–4 inch depth, bags vs skid-steer scoops.
Calculate mulch → - TOOL_03
Concrete
Yards for the pour
0.6cu ft / 80 lb bag
Slabs, footings, post holes. Ready-mix yards with waste, or bagged counts.
Calculate concrete → - TOOL_04
Tile
Floors, walls & boxes
10%cut waste factor
Room dimensions, standard tile presets, box counts, and grout needed.
Calculate tile → - TOOL_05
Deck
Boards, joists & screws
16"O.C. joist spacing
5/4×6 and 2×6 boards, continuous lengths, linear footage, and screw counts.
Calculate deck → - TOOL_06
Gravel
Tons & bulk cubic yards
1.4tons / cu yd
Driveways, walkways, patio bases. Pea gravel, crushed stone #57, river rock.
Calculate gravel →
THE QUICKJOB CALC STANDARD
Why another calculator site?
Most construction calculators online are engineered to game search engines, not to help the person holding a tape measure. They bury the input fields under six paragraphs of SEO fluff, bombard you with layout-shifting video ads, and freeze when you have one bar of cellular reception in the checkout aisle.
QuickJob Calc is built the other way around: instant load speed, field-tested ergonomics, and completely transparent math.
Built for One-Handed Mobile Use
No cookie consent mazes, no newsletter takeovers, and zero layout shifts. Clean, high-contrast touch controls engineered so you can punch in numbers with one thumb while standing on a ladder or in the lumber aisle.
Shows the Math, Never Guesses
Every calculation prints its exact assumptions: 350 sq ft/gal coverage, 0.6 cu ft per 80-lb bag, 1.4 tons/yd³ bulk density. If your supplier's specs differ, you can verify and adjust with complete confidence.
Jobsite Tolerances & Waste Built In
Lumber warps, tiles chip, and subgrades dip. Every tool provides configurable 10%–15% waste buffers and gives actionable quantities—bags, tons, cubic yards, and cartons—ready for the cashier or supply desk.
New trade calculators shipped on a monthly cadence
Currently live with 6 essential tools (Concrete, Decking, Gravel, Mulch, Paint, Tile). Next up in active development: Paver Patios & Base, Grass Seed & Overseeding, Drywall & Framing Studs.