Construction Calculator A1

Advanced construction calculator for concrete, steel, RCC, BOQ and material estimation. Built for engineers, contractors and site professionals.

The #1 construction calculator trusted by 1M+ contractors, builders, and engineers worldwide.

CONCRETE CALCULATOR • Slabs, footings, columns, beams, stairs & circular slabs • Instant material quantities: cement bags, sand, gravel • Mix ratios for any project specification

REBAR & STEEL CALCULATOR • Bar Bending Schedule (BBS) with shape codes • Weight calculator for all bar sizes (#3-#18) • Lap length, cover & spacing calculations • Steel tonnage for structural estimates

FEET-INCHES CALCULATOR • Add, subtract, multiply, divide in feet-inches-fractions • No decimal conversion needed • Perfect for lumber & framing calculations

AREA & VOLUME • 15+ shapes: rectangle, circle, triangle, trapezoid & more • Room area, paint coverage, flooring estimates • Excavation & fill volume calculations

UNIT CONVERTER • Length, area, volume, weight conversions • Construction-specific units included

PROFESSIONAL FEATURES • Bill of Quantities (BOQ) with PDF/Excel export • Save & organize calculations by project • Share estimates with clients instantly • Material cost estimation • Company branding on reports

Built for real job sites. Used by professionals in 150+ countries.

Download now and estimate like a pro.