Roofing & Pitch Calculator ES

Complete Spanish-language roofing takeoff, pitch geometry, attic ventilation and common rafter framing calculator built for Hispanic roofers, crew leads and residential roofing contractors across the United States. Works 100% offline on the roof or at the supply house.

■ INTERACTIVE ROOF PITCH DIAL (1:12 TO 18:12)
- Instant roof angle in degrees and exact trigonometric slope multiplier
- Live walkability classification with IRC R905.2.2 low-slope underlayment reminders and OSHA 29 CFR 1926.501 steep-slope harness & roof-jack alerts

■ COMPLETE ROOFING MATERIAL TAKEOFF BY SQUARES
- Calculate from building footprint plus eaves/rake overhangs or direct flat roof area (sq. ft.)
- Select 10% Gable or 15% Hip/Valley waste factors
- Outputs exact Roofing Squares, standard (3/sq) or heavyweight (4/sq) shingle bundles, synthetic underlayment rolls (10 sq/roll), 15# & 30# felt rolls, Ice & Water Shield eave rolls, Starter Strip bundles, Hip & Ridge cap bundles, 10-ft Drip Edge pieces, and 7,200-count coil nail boxes (4-nail standard vs 6-nail high-wind zone)

■ ATTIC VENTILATION CALCULATOR (IRC R806 NFA)
- Net Free Area (in²) under both 1/150 and 1/300 code ratios
- Balanced 50% soffit intake vent count and 50% exhaust in linear feet of Ridge Vent or static Box Vents

■ COMMON RAFTERS & BILINGUAL JOB QUOTE BUILDER
- Span, run, ridge rise and common rafter cut length including overhang tail to the nearest 1/8 inch, plus recommended dimensional lumber length
- Price per Square estimator (materials, installation labor and tear-off) that saves quotes locally and shares clean estimates in either Spanish or English

■ OFFICIAL SAFETY & ENERGY REFERENCES
- OSHA 29 CFR 1926.501 – Roofing & Construction Fall Protection: https://www.osha.gov/fall-protection
- U.S. Department of Energy – Cool Roofs & Ventilation Information: https://www.energy.gov/energysaver/cool-roofs

■ INDEPENDENT ESTIMATOR DISCLAIMER
This application is an independent private roofing estimation tool and is NOT affiliated with, endorsed by, or connected to OSHA, the U.S. Department of Energy, or the International Code Council (ICC). Always verify field measurements, wind-zone fastening rules, and manufacturer installation specifications before ordering or installing materials.