SiteCore BOQ Engine
7 IS-Metric Construction Calculators & Local Project BOQ Engine
Role & Context
Creator & Lead Developer
Live Web Application
Built-In Tools
7 Standard Calculators
Standards
Indian Standard (IS) Formulas
Persistence
Local Browser IndexedDB
Export
CSV & JSON Data Backup
Formula: Vg = L × W × T ; Vn = Vg − D ; Vo = Vn × (1 + waste% / 100)
Audited Concrete BOQ Breakdown
Net BOQ Volume (Vn)
3.800 m³
Order (+5% waste)
3.990 m³
Engine runs purely in TypeScript (`sitecore_v1` IndexedDB) with immutable snapshots.
Workflow · Calculate → Explain → Save to Project → Price → Record Work
All 7 Built-In SiteCore v0.1 Calculators & Golden Verification Checks
Slabs/beams/columns minus deductions · Ex: 5×4×0.125m = 2.500 m³
Bricks & wet mortar minus openings · Ex: 5×3×0.23m = 2.967 m³ (1,558 units)
1/2-face plaster + cement/sand · Ex: 2 faces @ 12mm = 25.8 m² (0.3096 m³)
N-coat paint area + 10% allowance · Ex: 12.9 m² × 2 ÷ 10 + 10% = 2.838 L
Whole tiles & boxes minus cutouts · Ex: 5×4m (600mm) = 62 tiles, 16 boxes
Circular rebar π/4×d²×7850×L×N · Ex: Ø12mm × 10m × 5 = 44.391 kg
Exact metric-imperial helper · Ex: 12 ft 2 in ↔ 3.7084 m
INR totals separated from physical units · OVERRUN (>100%) alerts · JSON/CSV
Estimation Aid Disclaimer: Quantities, mortar splits, and rates are geometric planning estimates only — not structural design, mix design, Bar Bending Schedules (BBS), BIS/byelaw compliance, or certified contractor billing. Always verify quantities against approved contract drawings.
Project Context & Objectives
Site engineers and students frequently rely on fragile spreadsheets that conflate nominal vs. actual brick sizes or overlook opening deductions, causing estimation errors.
Key Features & Design Solutions
- 7 specialized calculators implementing standard Indian construction calculation formulas.
- Direct Calculate → Explain → Save workflow with automated cost breakdowns in INR.
- Local browser storage allowing users to manage multiple project estimates with CSV/JSON export.
Key Deliverables
- 7 Construction Calculators (Concrete, Masonry, Plaster, Paint, Flooring, Steel, Units)
- Itemized INR Cost Breakdown & Material Schedules
- Single-Page Application with Offline Persistence