Paint Calculator
Estimate exact gallons needed based on wall surface area and coat counts.
Calculate anything.
Build everything.
Free calculators for home builders, renovators, and contractors. No signup. No fluff. Just the numbers you need on site.
Browse by Category
Concrete to carpet - find the right tool for the job.
Sitework
Concrete, gravel, sand, asphalt, retaining wall, paver, and bulk material calculators for outdoor construction planning.
Interiors
Flooring, tile, drywall, carpet, grout, and thinset calculators for interior renovation and finish planning.
Roofing
Roof pitch, rafter length, shingle, truss, and roofing cost calculators for roof planning and material estimates.
Electrical
Wire size, conduit fill, generator sizing, battery backup, voltage drop, ampacity, box fill, and circuit calculators.
Precision Instruments
Popular Calculators
Use Calculator
Brick & Mortar
Calculate brick counts, mortar volume, and waste factors for masonry.
Flooring Estimator
Determine square footage for hardwood, laminate, or carpet projects.
Concrete Slab Volume
Professional cubic yardage calculator for pads, footings, and circular pillars. Includes rebar weight estimations.
Wire Size Calculator
Estimate a practical conductor size from amp load, run length, voltage, material choice, and voltage-drop limits.
The Drafting Process
01
Choose your tool
Select from our library of 29+ specialized calculators tailored for specific site tasks.
02
Enter your numbers
Input your project dimensions. Our system handles complex unit conversions automatically.
03
Build with confidence
Get instant, precise results. Export your calculation ledger or share it with your team.
From the Site
All articlesGuides & Advice
Home improvement tips, contractor hiring guides, and DIY project walkthroughs for builders at every level.
House Plans vs Architect: Which Design Approach Is Better for Your Project?
Pre-made house plans cost a fraction of custom architectural services, but they don't account for your specific lot, local codes, or lifestyle. Hiring an architect delivers a tailored design
Read article
New Home Construction Checklist: Step‑By‑Step Guide
Building a new home is a complex, multi-stage project that can take months to complete. The entire process typically breaks down into three phases
Read article
Concrete vs Pavers: Which Paving Option Is Better?
Choosing between concrete and pavers affects installation costs, long-term durability, maintenance requirements, and design flexibility. The right material depends on your budget
Read article