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Pipe Offset
Calculate travel, centerline run, multiplier, and fractional-inch output for 22.5°, 30°, 45°, and 60° fittings.
Open calculator → PipefittingRolling Offset
True offset, travel, and run from rise + roll measurements.
Open calculator → Jobsite MathFeet & Inches
Add or subtract field measurements with feet, inches, and fractions.
Open calculator → FabricationPipe Weight
Estimate steel pipe weight from OD, wall thickness, and length.
Open calculator → MoneyOvertime Pay
Straight time, 1.5×, 2×, per diem, and gross weekly pay.
Open calculator → Jobsite MathDecimal / Fraction / mm
Convert inch decimals, fractions, and millimeters.
Open calculator → PipefittingPipe Circumference
Circumference, quarter points, half wrap, and equal layout spacing.
Open calculator → FabricationPlate Weight
Steel plate weight by length, width, thickness, and quantity.
Open calculator → PipefittingTwo-45 Set
Center-to-center travel, run, shrink, and optional takeout.
Open calculator → PowerGenerator Load
Running watts, starting watts, and headroom estimate.
Open calculator →IronworkersBolt Circle
Find bolt-hole coordinates and spacing around a bolt circle.
Open calculator → IronworkersBeam Deflection
Estimate simple-span beam deflection with a center point load.
Open calculator → ElectriciansOhm's Law
Calculate volts, amps, watts, or ohms from two known values.
Open calculator → ElectriciansVoltage Drop
Estimate voltage drop by amps, one-way distance, voltage, phase, and copper wire size.
Open calculator → BoilermakersTank Volume
Calculate cylinder/tank volume in gallons, cubic feet, and barrels.
Open calculator → BoilermakersTube Pitch
Estimate tubes per row and pitch spacing across a tube sheet diameter.
Open calculator → ConcreteConcrete Yardage
Calculate cubic yards for slabs, pads, and rectangular pours.
Open calculator → ConcreteRebar Spacing
Estimate rebar count and total length for a rectangular grid.
Open calculator → MillwrightsPulley RPM
Calculate driven RPM from driver RPM and pulley diameters.
Open calculator → MillwrightsShaft Speed
Calculate shaft surface speed from diameter and RPM.
Open calculator → Heavy EquipmentEquipment Production
Estimate hourly production from bucket size, cycle time, and efficiency.
Open calculator → Heavy EquipmentTruck Loads
Estimate loads needed from total yards and truck capacity.
Open calculator → Sheet MetalBend Allowance
Estimate bend allowance and flat length for a simple sheet-metal bend.
Open calculator → Sheet MetalDuct Area
Calculate rectangular duct area, perimeter, and equivalent round diameter.
Open calculator → RiggingSling Load Angle
Estimate sling leg tension based on load weight, number of legs, and sling angle.
Open calculator → WeldingWeld Filler Metal
Estimate filler metal weight from weld length and cross-sectional weld area.
Open calculator → PipefittingPipe Ordinates
Generate equal wrap spacing marks around a pipe for 8, 12, 16, 24, or 32 ordinate layouts.
Open calculator → Heavy EquipmentExcavation Volume
Estimate excavation cubic yards from length, width, depth, and swell percentage.
Open calculator → Sheet MetalRoof Panel Count
Estimate roof or wall metal panel count from coverage width and run length.
Open calculator → ElectriciansConduit Fill
Quick helper to estimate percent fill from conduit inside diameter and total wire area.
Open calculator → RoofersRoofing Squares
Estimate roof area, roofing squares, bundles, and waste from length, width, pitch, and number of roof planes.
Open calculator → RoofersRoof Pitch
Convert rise/run into pitch, angle, pitch factor, and rafter length.
Open calculator → RoofersShingle Bundles
Estimate shingle bundles from roof square footage, bundle coverage, and waste.
Open calculator → GlaziersGlass Weight
Estimate glass lite weight from width, height, thickness, and quantity.
Open calculator → GlaziersGlass Sq Ft
Calculate glass square footage, perimeter, and united inches from lite dimensions.
Open calculator → GlaziersStorefront Cuts
Quickly subtract deductions from rough/opening dimensions for storefront metal cut estimates.
Open calculator → PlumbingPipe Volume
Calculate gallons, liters, and cubic feet inside a round pipe from inside diameter and length.
Open calculator → PlumbingDrain Slope
Calculate fall, slope percent, and inches per foot for drain and DWV layout.
Open calculator → PlumbingPipe Pressure Loss
Estimate water pressure loss using the Hazen-Williams equation.
Open calculator → HVACHVAC BTU Estimate
Quick room cooling/heating load estimate from floor area and a selectable BTU-per-square-foot factor.
Open calculator → HVACDuct CFM
Estimate airflow from rectangular or round duct area and air velocity.
Open calculator → HVACSuperheat / Subcooling
Calculate superheat and subcooling from measured line and saturation temperatures.
Open calculator → Sprinkler FittersSprinkler Density Flow
Estimate required flow from design density and coverage area.
Open calculator → Sprinkler FittersSprinkler Head Coverage
Calculate coverage area and approximate head count from spacing and room area.
Open calculator → CarpentersRafter Length
Calculate common rafter length from horizontal run and roof rise per 12 inches.
Open calculator → CarpentersStair Stringer
Calculate number of risers, actual rise, tread run, and stringer length.
Open calculator → MasonryBlock Quantity
Estimate 8x8x16 nominal concrete block count for a wall with waste.
Open calculator → MasonryMortar Bags
Estimate mortar bags from block count and user-set blocks-per-bag coverage.
Open calculator → Tile / TerrazzoTile Quantity
Estimate tile count from room size, tile size, and waste.
Open calculator → Tile / TerrazzoThinset Bags
Estimate thinset bags from floor area, waste, and bag coverage.
Open calculator → PlasterersPlaster Area
Calculate wall/ceiling surface area after subtracting openings.
Open calculator → PlasterersPlaster Material
Estimate bags from surface area, coats, and user-set coverage per bag.
Open calculator → PaintersPaint Gallons
Estimate gallons of paint or coating from area, coats, coverage, and waste.
Open calculator → PaintersCoating Mix Ratio
Calculate component A/B quantities from a mix ratio and desired total volume.
Open calculator → DrywallDrywall Sheets
Estimate drywall sheet count from total area, sheet size, and waste.
Open calculator → DrywallJoint Compound
Estimate compound buckets from board area and user-set coverage.
Open calculator → FlooringFlooring Quantity
Estimate flooring square footage and cartons from room size, waste, and carton coverage.
Open calculator → FlooringCarpet Roll Length
Estimate linear feet from room width/length and roll width.
Open calculator → InsulatorsPipe Insulation Area
Calculate outside surface area of insulated pipe from outside diameter and length.
Open calculator → InsulatorsBatt Insulation
Estimate insulation batt count from wall area and batt coverage.
Open calculator → Elevator ConstructorsElevator Travel Time
Estimate ideal travel time from vertical travel and rated speed.
Open calculator → Elevator ConstructorsFloor Rise Total
Calculate total vertical rise from number of floor intervals and average floor-to-floor height.
Open calculator → LaborersTrench Volume
Calculate trench excavation cubic yards from length, width, and depth.
Open calculator → LaborersMaterial Tonnage
Estimate tons from cubic yards and a user-set material density.
Open calculator → Survey / LayoutGrade / Slope
Calculate grade percent, inches per foot, and angle from rise and run.
Open calculator → Survey / LayoutCoordinate Distance
Calculate horizontal distance and bearing angle from two XY points.
Open calculator → Stationary EngineersBoiler Horsepower
Convert boiler heat output in BTU/hr to boiler horsepower.
Open calculator → Stationary EngineersChiller Tonnage
Convert cooling capacity between BTU/hr, refrigeration tons, and kW.
Open calculator → Pile DriversPile Batter Length
Calculate pile length and horizontal offset from vertical depth and batter ratio.
Open calculator → Pile DriversPile Spacing Count
Estimate pile count along a straight line from total length and spacing.
Open calculator → WaterproofingMembrane Roll Quantity
Estimate membrane rolls from surface area, roll coverage, overlap, and waste.
Open calculator → WaterproofingSealant Tubes
Estimate sealant tubes from joint dimensions, total joint length, and tube volume.
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