Concrete Calc Build

CONCRETE CALCULATOR — VOLUME, BAGS & COST
Estimate concrete volume, bag count (60/80/90 lb), and project cost in seconds. Built for concrete contractors, general contractors, masons, builders, DIY homeowners, and construction supply stores. Works 100% offline on the job site.

5 SHAPE TYPES:
- Rectangular Slab — driveways, patios, garage floors, sidewalks
- Circular Slab — round patios, fire pit pads, fountain bases
- Footing — foundation footings, porch footings, deck footings
- Column / Post — round columns, porch posts, piers, pillars
- Wall — retaining walls, foundation walls, poured walls

ACCURATE CALCULATIONS:
- Volume in cubic yards and cubic feet
- Bag estimates: 60 lb (0.017 yd3), 80 lb (0.022 yd3), 90 lb (0.025 yd3)
- Cost estimate based on price per cubic yard (default $150/yd3)
- Material mix breakdown: cement, sand, gravel (1:2:3 ratio) — in-app purchase
- Instant results — enter dimensions and tap Calculate

SAVE & EXPORT:
- Save calculation history (in-app purchase)
- Load saved calculations to recalculate with new dimensions
- Export detailed PDF reports (in-app purchase)
- Share estimates with clients and suppliers

DESIGN & USABILITY:
- Material Design 3 interface
- Dark theme support (in-app purchase)
- Works completely offline
- Bilingual: English and Spanish
- Input in feet and inches — US construction standard

TARGET AUDIENCE:
Professional concrete contractors, general contractors, masons, builders, DIY homeowners, and building supply stores who need quick, reliable volume estimates on the job site or in the store.

CALCULATION METHOD:
Volume formulas for each shape:
- Slab: length x width x thickness
- Circular: pi x radius squared x thickness
- Footing: length x width x depth
- Column: pi x radius squared x height
- Wall: length x height x thickness
All volumes converted to cubic yards (divide by 27). Bag count = volume / bag yield.

OPTIONAL PRO UPGRADE — $2.99 ONE-TIME IN-APP PURCHASE:
The following features require a separate one-time in-app purchase. They are not required to use the calculator:
- Unlimited saved calculation history
- PDF export of results
- Material mix breakdown (cement / sand / gravel)
- Dark theme
- Ad-free experience

PRIVACY & DATA:
- No account required
- No personal data collection
- Works completely offline
- All calculations stored locally on your device

PERFECT FOR:
- Concrete contractors and crews
- General contractors and home builders
- Masons and finishers
- DIY homeowners
- Building material suppliers
- Estimators and quoters

Simplify concrete volume estimation on the job site.