Piping Tools
Calculate pipe weight, capacity, velocity, cross-sectional areas and slope.
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Free practical calculators for piping, marine, CAD, Excel and everyday engineering work.
27 tools
Piping
Piping design
Marine
Ship & marine design
Unit Converter
Engineering units
CAD
Drawings & coordinates
Excel
Practical formula helpers
YOUR EVERYDAY TOOLKIT
POPULAR TOOLS / 09Popular calculators
Find the tools you need for everyday engineering calculations.
Piping
Pipe Weight Calculator
Calculate theoretical pipe mass from actual outside diameter, wall thickness, length and material density.
Open calculatorPiping
Pipe Internal Volume Calculator
Find the full internal capacity of a straight pipe using its outside diameter, wall thickness and length.
Open calculatorPiping
Pipe Flow Velocity Calculator
Calculate average full-bore velocity from inside diameter and volumetric flow, with results in m/s and ft/s.
Open calculatorMarine
Marine Mean Draft Calculator
Calculate the arithmetic average of forward and aft draft readings without vessel-specific corrections.
Open calculatorMarine
Marine Trim Calculator
Identify trim by stern, trim by bow or even keel; optionally calculate gradient and angle using a reference length.
Open calculatorUnit Converter
mm ↔ Inch Converter
Convert millimeters and inches in both directions, including a fraction rounded to the nearest 1/64 inch.
Open calculatorUnit Converter
Pressure Converter
Convert one pressure value simultaneously to Pa, kPa, MPa, bar, kgf/cm² and psi.
Open calculatorCAD
CAD Scale Calculator
Convert drawing length to real length or the reverse using a 1:n scale and optional scale presets.
Open calculatorCAD
Coordinate Distance Calculator
Calculate signed coordinate changes and 2D/3D straight-line distances between two Cartesian points.
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27 CALCULATORS & HELPERSExplore all disciplines
Marine Tools
Check draft and trim readings and calculate liquid volume in simple tanks.
Unit Converter Tools
Convert length, pressure, mass, temperature, volume, flow and density.
CAD Tools
Calculate drawing scales, SCALE factors, coordinate distances and offsets.
Excel Tools
Extract and split tag strings, convert units and explore common Excel functions.
ENGINEERING NOTES
View all guidesEngineering guides
01Piping / GUIDE
Pipe OD, ID and wall thickness: what to check
Distinguish nominal pipe sizes from actual dimensions before calculating weight or velocity.
02Marine / GUIDEDraft and trim: get the sign right
Understand mean draft, bow and stern trim, and reference-length gradients.
03CAD / GUIDEDrawing scales and AutoCAD SCALE factors
Convert drawing lengths and distinguish geometry scaling from viewport and printing settings.
Clear formulas. Simple calculations.
EngiCalcLab helps with everyday design work. Check the formula, worked example and scope of every calculator.
Free engineering calculators for piping, marine, CAD and everyday engineering work.