About DIYCalc
Free, accurate construction calculators — no signup required.
What We Do
DIYCalc.app provides 30+ free construction calculators across 10 categories, helping DIY homeowners, contractors, and builders estimate materials, costs, and dimensions for their projects. Every calculator runs entirely in your browser — no data is sent to our servers.
Calculator Categories
🧱
Concrete
4 tools
🏠
Roofing
3 tools
🪵
Framing
6 tools
⚡
Electrical
2 tools
🔧
Plumbing
2 tools
❄️
HVAC
1 tools
🎨
Finishing
5 tools
🌿
Landscaping
5 tools
🧤
Insulation
1 tools
💰
Cost Estimators
1 tools
Methodology
Our calculators use formulas and standards from authoritative sources including:
- IRC 2021 — International Residential Code for framing, staircase, and structural calculations
- ACI 318-19 — American Concrete Institute standards for concrete mix design and coverage
- NEC 2023 — National Electrical Code for wire sizing, ampacity, and voltage drop
- BLS Data — Bureau of Labor Statistics for regional cost estimates and labor rates
- Manufacturer specs — Coverage rates for roofing, insulation, paint, and landscaping materials
⚠️ Disclaimer
All calculations are estimates for planning purposes only. Actual material quantities, costs, and requirements may vary based on local conditions, building codes, and project specifics. Always consult a licensed contractor or building professional and verify with local building codes before purchasing materials or beginning construction.