Construction Calculator

Concrete & Masonry
Concrete Volume Calculator — slab/footing/column volume in cubic yards/meters, bag count needed (60lb/80lb bags), with waste % buffer
Concrete Cost Estimator — volume × price per yard + delivery fee
Brick/Block Calculator — wall area ÷ brick coverage, accounting for mortar joint width

Flooring & Finishing
4. Tile Calculator — room area ÷ tile size, with waste % (10-15% standard), box count based on tiles-per-box
5. Paint Coverage Calculator — wall area (accounting for doors/windows deduction) ÷ coverage per gallon, number of coats
6. Flooring/Carpet Calculator — area + waste factor, converts to boxes/rolls
Roofing
7. Roof Pitch & Area Calculator — input rise/run, output pitch angle, roof area accounting for pitch multiplier, shingle bundle count
Electrical
8. Wire Gauge & Voltage Drop Calculator — input amperage, distance, voltage → recommended AWG gauge and % voltage drop
9. Electrical Load Calculator — sum of circuit wattages → required breaker size/amperage
Plumbing
10. Pipe Volume/Sizing Calculator — pipe diameter + length → water volume, flow rate basics
Lumber & Framing
11. Board Feet Calculator — thickness × width × length ÷ 12 formula, with price-per-board-foot cost option
12. Stud Spacing Calculator — wall length ÷ on-center spacing (16"/24") → stud count + plates
General
13. Unit/Measurement Converter (trade-specific) — feet/inches/fractions ↔ metric, since trades use fractional inches heavily (this is different from a generic unit converter — needs fraction support like 5 3/8")