PlanQty
Construction Calculators for the Field & Office
Fast construction quantity calculations for estimating and field checks: concrete, excavation, grading, pipe, paving, and production. Published formulas, worked examples, and units that match the job. These are estimating aids, not a substitute for approved drawings.
Categories
Concrete
Volume and bag estimates for slabs, pads, and footings.
Paving & Base
Area, tonnage, and riprap tools for paving and armor.
Pipe & Utilities
Slope, bedding, and pipe volume helpers for utility work.
Excavation
Trench cut, backfill, spoils, shrink/swell, and truckloads.
Grading
Percent grade, elevation difference, and stationing.
Conversions
Decimal feet and feet/inches converters for layout.
Production
Crew man-hours and production rates.
Tools
Concrete Cubic Yard Calculator
Convert slab or footing dimensions into cubic yards of concrete.
Asphalt Tonnage Calculator
Estimate hot-mix asphalt tons from area, thickness, and density.
Base Rock Tonnage Calculator
Estimate crushed rock or aggregate base tons from area, thickness, and density.
Trench Excavation Calculator
Convert trench length, width, and depth into cubic yards of excavation.
Trench Spoils Calculator
Convert bank trench yards to loose spoils and truckloads using a swell factor.
Pipe Slope Calculator
Convert elevation drop and run into percent grade, ratio, and inches per foot.
Percent Grade Calculator
Convert rise and run into percent grade, slope ratio, and feet per 100 feet.
Elevation Difference Calculator
Find the cut or fill between two elevations, in feet and inches.
Station Difference Calculator
Find the distance between two stations in the 100-foot stationing system.
Bedding Calculator
Estimate pipe bedding cubic yards from length, width, and depth.
Backfill Calculator
Estimate trench backfill cubic yards after subtracting pipe displacement.
Truckload Estimator
Convert cubic yards into truckloads using a real truck capacity.
Riprap Quantity Calculator
Convert riprap length, width, and thickness into cubic yards and tons.
Paving Area Calculator
Convert pavement length and width into square feet and square yards.
Decimal Feet Converter
Convert feet and inches to decimal feet used on grade sheets.
Feet/Inches Converter
Convert a length in any unit into feet and remaining inches.
Shrink/Swell Calculator
Convert bank cubic yards to loose and compacted yards.
Crew Man-Hour Calculator
Estimate crew hours and man-hours from quantity and production rate.
Production Rate Calculator
Back-calculate production rate from quantity and hours.
Pipe Volume Calculator
Calculate internal volume of a circular pipe in cubic feet and gallons.