NumLuma›Calculators›Home Project Calculators

Plan before you buy

Home Project Calculators

Estimate materials from real dimensions before you head to the store. These tools focus on quantities, coverage and waste allowances so you can compare products and plan purchases with fewer surprises.

NumLuma Journey

A useful order, not just a list.

Start with the first question, then move through the connected calculations. You can jump in anywhere, but the sequence keeps the task coherent.

Step 1 of 6

01 Start here Paint

Estimate gallons of paint.

02 Next calculation Flooring

Estimate flooring area with waste.

03 Next calculation Concrete

Estimate cubic yards of concrete.

04 Next calculation Tile

Estimate tile quantity.

05 Next calculation Drywall

Estimate drywall sheet quantity.

06 Next calculation Roofing

Estimate roofing squares.

Start calculating

Everything you need for this job.

Each tool is free, works without an account and links to its formula, assumptions and related calculators.

Browse all calculators →

HM Home

Paint Calculator

Estimate gallons of paint.

NL / HM Open

HM Home

Flooring Calculator

Estimate flooring area with waste.

NL / HM Open

HM Home

Concrete Calculator

Estimate cubic yards of concrete.

NL / HM Open

HM Home

Tile Calculator

Estimate tile quantity.

NL / HM Open

HM Home

Drywall Calculator

Estimate drywall sheet quantity.

NL / HM Open

HM Home

Roofing Calculator

Estimate roofing squares.

NL / HM Open

HM Home

Square Footage Calculator

Find rectangular area in square feet.

NL / HM Open

HM Home

Wall Area Calculator

Estimate wall area for paint or finishes.

NL / HM Open

HM Home

Room Area Calculator

Find room floor area from length and width.

NL / HM Open

HM Home

Cubic Yard Calculator

Calculate cubic yards from length, width and depth.

NL / HM Open

HM Home

Gravel Calculator

Estimate gravel volume.

NL / HM Open

HM Home

Mulch Calculator

Estimate mulch volume.

NL / HM Open

HM Home

Soil Calculator

Estimate soil volume for beds and fill.

NL / HM Open

HM Home

Paver Calculator

Estimate paver quantity for a patio or path.

NL / HM Open

HM Home

Wallpaper Calculator

Estimate wallpaper rolls from wall area.

NL / HM Open

HM Home

Fence Calculator

Estimate fence panels and posts.

NL / HM Open

HM Home

Deck Area Calculator

Calculate deck area with waste allowance.

NL / HM Open

HM Home

Board Foot Calculator

Calculate board feet for lumber.

NL / HM Open

HM Home

Stair Calculator

Estimate stair risers and tread depth.

NL / HM Open

HM Home

Material Waste Calculator

Add a waste allowance to material quantity.

NL / HM Open

Before you calculate

Useful context, not filler.

NumLuma groups tools around real tasks so you can move from one calculation to the next without starting your research over.

Should I add extra material for waste?

Usually yes. Cuts, breakage, pattern matching and irregular layouts can increase the amount you need. The right allowance depends on the material and project.

Do these calculators replace manufacturer instructions?

No. Use NumLuma for planning, then compare the estimate with product coverage, installation instructions and local requirements before purchasing.