Free engineering tools
Engineering tools for the yard and the field.
46 calculators across 8 workbenches · IS · ASTM · EN references
Estimates are for planning. Check material grades and dimensions against project documents.
Metal Weight
Weigh any section in seconds
8 calculators
Plate Weight Calculator
Calculate plate weight, area, and volume from dimensions and grade.Bar Weight Calculator
Round, square, and hex bar weight with instant surface area outputs.Pipe Weight Calculator
OD/wall/length-based pipe weight for fabrication and freight planning.Rectangular Tube Weight Calculator
Rectangular and square tube weight, area, and target-length calculator.Beam Weight Calculator
AISC beam designation weight checks with quick area approximation.Channel Weight Calculator
C-channel weight and surface checks from designation and member length.Angle Weight Calculator
L-angle section weight and area checks from designation and run length.
Pipe Layout
Lay out pipe runs without redoing the math
5 calculators
Rolling Offset Calculator
True offset and travel for multi-plane pipe routing.Mitered Joint Calculator
Cut angle, setback, and long-point values for mitered pipe joints.Fitting Allowance Calculator
Centerline cut length from fitting takeout and count.Flange Dimensions Lookup
ASME B16.5 Class 150 and 300 flange dimensions, NPS 1/2 to 24.
Converters
Convert engineering units without leaving the job
10 calculators
Weight Converter
kg ⇄ lbConvert mass/weight units for estimating and logistics.Force Converter
kN ⇄ tonne-forceConvert N, kN, kgf, tonne-force, lbf and kip-force.Torque Converter
N·m ⇄ lbf·ftConvert N·m, kgf·m, lbf·ft and lbf·in for bolt and shaft torque.Pressure Converter
psi ⇄ barConvert pressure values between psi, bar, kPa, MPa, and Pa.Temperature Converter
°C ⇄ °FConvert temperature between °C, °F, K and °R.Density Converter
kg/m³ ⇄ lb/in³Convert kg/m³, g/cm³, lb/in³, lb/ft³ and lb/gal.Speed Converter
knot ⇄ m/sConvert m/s, km/h, knots, mph and ft/s for wind, vessel and crane speeds.Volume Converter
L ⇄ gal (US)Convert volume across liter, cubic, and US gallon units.Area Converter
m² ⇄ ft²Convert area values for coating, flooring, and planning.
Load & Capacity
Screen loads before the formal review
3 calculators
Estimating
Turn quantities into a defensible price
3 calculators
Reference
Grade, size, and torque references on one desk
4 calculators
Standard Sizes Lookup
Section-size and pipe schedule lookup from designation strings.General Tolerances (ISO 2768 / ISO 13920)
General tolerance for machined parts (ISO 2768-1) and welded constructions (ISO 13920).Bolt Torque Estimate
Torque and preload from inch or metric bolt size, grade and nut factor.
Marine & Barge
Draft, righting arm and tanks for barges
7 calculators
Loading Condition
Displacement, KG, LCG, TCG, draft, GM, trim and list of a box barge from a table of weights.Righting Arm (GZ) Curve
GZ curve, max GZ, first zero crossing and areas of a rectangular barge section, from the exact immersed section.Free Surface Effect
Free surface moment and rise in KG of a slack rectangular tank.Tank Volume and Mass
Volume, mass and fill of a rectangular, horizontal cylindrical or vertical cylindrical tank at a given liquid depth.Heel from an Offset Weight
Heel angle from an offset weight and GM, or GM from an inclining experiment, at small angles.Barge Stability Estimate
Initial GM estimate for box-barge geometry and KG assumptions.
Plate Fabrication
Flat lengths, developments and yield for plate
6 calculators
Rolled Cylinder Blank
Blank length and plate weight of a rolled cylinder from its inside diameter, thickness and neutral-axis position.Cone Development
Flat pattern radii and sector angle of a cone frustum from its two diameters and its height.Parts per Sheet
Count, yield and offcut weight of rectangular parts on a sheet, in a straight grid, tried both ways round.Dished Head Volume and Weight
Internal volume and metal weight of a 2:1 ellipsoidal or hemispherical head with its straight flange.Punching and Shearing Force
Force to shear a cut perimeter through the plate thickness at the shear strength you enter.