Reference tables
Compare engineering dimensions, units and reference values with their sources.
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Area Conversion Chart: m², ft², hectare, acre
Area conversion chart: mm², cm², m², hectare, km², in², ft², yd², acre and mi² equivalents, with common values such as 100 m² or 1 acre. - Table
AWG Wire Gauge Chart
AWG wire gauge chart for AWG 0000 to 40: theoretical wire diameter, area in mm² and the nearest IEC size. No current rating. Labelled drawing. - Table
Copper Tube Size Chart (EN 1057)
Copper tube size chart: EN 1057 plumbing tube from 6 to 267 mm outside diameter with common wall thicknesses, inside diameter and kg/m. Labelled drawing. - Table
Pressure Conversion Chart
Pressure conversion chart: what 1 unit equals in Pa, kPa, MPa, bar, mbar, psi, atm, mmHg, mmH₂O and kgf/cm². Absolute and gauge references are kept separate. - Table
Pipe Size Conversion Chart: DN, Inch and OD
Pipe size conversion chart from DN10 to DN300: inch size and outside diameters of steel, threaded, PE, PP-R, copper and stainless press pipe side by side, mm. - Table
Saturated Steam Table by Pressure
Saturated steam table by pressure: saturation temperature, specific volume, enthalpy and entropy from 0.01 to 220 bar absolute, computed with IAPWS IF97. - Table
Saturated Steam Table by Temperature
Saturated steam table by temperature: saturation pressure (absolute), specific volume, enthalpy and entropy from 0.01 to 373.946 °C, computed with IAPWS IF97. - Table
Pipe Schedule Chart (NPS 1/8 to 24)
Steel pipe schedule chart for NPS 1/8 to 24: Sch 10, 40, 80 and 160 wall thickness, OD, ID and theoretical kg/m. Labelled drawing, ASME B36.10M. - Table
Hex Bolt and Nut Dimensions Chart (M3 to M36)
Hex bolt and nut chart, M3 to M36: width across flats s, head height k, across corners e, thread length b and nut height m. Letter labelled drawing, ISO 4014 and ISO 4032. - Table
Flow Rate Conversion Chart: m³/h, L/s, gpm, cfm
Flow rate conversion chart: L/h, L/min, L/s, m³/h, m³/s, cfm, ft³/s, US and UK gpm and bbl/d equivalents, with common values such as 10 m³/h or 100 gpm. - Table
EN 10255 Medium Series Tube Chart
EN 10255 medium series steel tube chart for DN15 to DN150: inch thread designation, OD, wall thickness, ID and plain end kg/m. Labelled drawing. - Table
DN to NPS Pipe Size Chart
DN to NPS pipe size chart from DN6 to DN600: inch nominal sizes with European and ASME outside diameters in mm. DN and NPS are not actual diameters. - Table
Rebar Area and Weight Chart (Ø6 to Ø40)
Rebar weight and area chart for Ø6 to Ø40: kg/m, area of 1 to 10 bars and a spacing matrix in cm²/m. Theoretical values with a labelled drawing. - Table
EN 10220 Steel Tube Sizes and Weight Chart
EN 10220 steel tube chart: series 1 outside diameters from 10.2 to 610 mm, DN match and kg/m for wall thicknesses 1.6 to 12.5 mm. Labelled drawing. - Table
Energy Conversion Chart: kWh, kcal, BTU, MJ
Energy conversion chart: J, kJ, MJ, Wh, kWh, kcal (IT and thermochemical), BTU and ft·lbf equivalents, with common values such as 10 kWh or 1000 kcal. - Table
EN 1092-1 Flange Dimensions Chart (PN 10 and PN 16)
EN 1092-1 flange dimensions for steel flanges DN 15 to DN 600 in PN 10 and PN 16: outside diameter D, bolt circle K, number and size of bolts, hole diameter L. - Table
Power Conversion Chart: kW, hp, PS, BTU/h, TR
Power conversion chart: W, kW, MW, mechanical hp, electric hp, metric PS, BTU/h, kcal/h and ton of refrigeration equivalents, with common values such as 10 kW or 12000 BTU/h. - Table
Volume Conversion Chart: Litres, Gallons (US and UK), m³
Volume conversion chart: mL, L, m³, in³, ft³, US fluid ounce, pint, quart, US gallon, UK gallon and petroleum barrel equivalents, with common values such as 10 L or 5 gallons. - Table
Welded Mesh Area and Weight Chart (Ø4 to Ø12)
Welded mesh chart for Ø4 to Ø12 wire at 50 to 300 mm spacing: area in cm²/m in one direction and weight in kg/m² of square mesh. Exact relations, labelled drawing. - Table
HEA Beam Dimensions Chart (HEA 100 to HEA 600)
HEA 100 to HEA 600 beam chart: h, b, tw, tf, r, area, weight in kg/m, second moment of area, section modulus and radius of gyration. Labelled drawing, EN 10365 dimensions. - Table
HEB Beam Dimensions Chart (HEB 100 to HEB 600)
HEB 100 to HEB 600 beam chart: h, b, tw, tf, r, area, weight in kg/m, second moment of area, section modulus and radius of gyration. Labelled drawing, EN 10365 dimensions. - Table
Speed Conversion Chart: km/h, m/s, mph, knots
Speed conversion chart: mm/s, m/min, m/s, km/h, ft/min, ft/s, mph and knot equivalents, with common values such as 50 km/h or 60 mph. - Table
Inch to mm Conversion Chart
Inch to mm conversion chart: fractions up to 2 inches in steps of 1/64 with millimetre and decimal inch values, and inch values for 1 to 100 mm. - Table
IPE Beam Dimensions Chart (IPE 80 to IPE 600)
IPE beam chart from IPE 80 to IPE 600: h, b, tw, tf, r, area, weight in kg/m, moment of inertia, section modulus and radius of gyration. Labelled drawing. - Table
Mass Conversion Chart: kg, lb, oz, ton
Mass conversion chart: mg, g, kg, metric tonne, oz, lb, short ton, long ton and troy ounce equivalents, with common values such as 10 kg or 100 lb. - Table
Force Conversion Chart: N, kN, kgf, lbf
Force conversion chart: N, daN, kN, MN, kgf, tonne force, lbf and kip equivalents, with common values such as 10 kN or 100 kgf. - Table
Metric Thread Chart (M1 to M64)
Metric thread chart from M1 to M64: coarse and fine pitch, d2, d3, D1, stress area and approximate tap drill. Labelled profile drawing, ISO 261 pitches. - Table
Stainless Steel Pipe Schedule Chart (NPS 1/8 to 12)
Stainless steel pipe schedule chart for NPS 1/8 to 12: 5S, 10S, 40S and 80S wall thickness, OD, ID and kg/m. Labelled drawing, ASME B36.19M. - Table
PE Pipe SDR Chart: Wall Thickness and PN (20 to 630 mm)
PE pipe SDR chart: wall thickness for SDR 41 to 7.4 at 20 to 630 mm outside diameter, with PE100 and PE80 pressure class PN. ISO 4065 relation, labelled drawing. - Table
PP-R Pipe Dimensions Chart (SDR 5 to 11)
PPR pipe size chart: wall thickness and inside diameter for SDR 11, 7.4, 6 and 5 at 16 to 160 mm outside diameter, with the usual PN match. Hot and cold water, drawing. - Table
Sheet Metal Weight Chart (0.4 to 50 mm)
Sheet metal weight chart from 0.4 to 50 mm: kg/m² for steel, stainless steel, aluminium, copper and brass, plus steel sheet mass for sample sizes. Sourced densities. - Table
SI Prefixes Chart
SI prefixes chart with all 24 prefixes from quecto to quetta, including the 2022 extension: symbol, power of ten and factor for kilo, mega, milli, micro, nano. - Table
Temperature Conversion Chart (°C, °F, K)
Temperature conversion chart with Celsius, Fahrenheit and Kelvin equivalents, plus a separate table for temperature differences, where no 32 offset applies. - Table
Water Density and Viscosity Table
Density, dynamic and kinematic viscosity and specific heat of liquid water, 0.01 to 100 °C. Computed with IAPWS IF97 and the IAPWS 2008 viscosity formulation. - Table
Torque Conversion Chart: N·m, kgf·m, lbf·ft
Torque conversion chart: N·m, kN·m, kgf·m, kgf·cm, lbf·ft, lbf·in and ozf·in equivalents, with common values such as 10 N·m or 50 lbf·ft. - Table
UNC Thread Chart (#1 to 4 in)
UNC thread chart from #1 to 4 in: TPI, major diameter, pitch, pitch diameter, minor diameter and approximate tap drill. mm and inch, labelled drawing, ASME B1.1. - Table
UNF Thread Chart (#0 to 1 1/2 in)
UNF thread chart from #0 to 1 1/2 in: TPI, major diameter, pitch, pitch diameter, minor diameter and approximate tap drill. mm and inch, labelled drawing, ASME B1.1. - Table
UPN Channel Dimensions Chart (UPN 80 to UPN 400)
UPN channel chart from UPN 80 to UPN 400: h, b, tw, tf, r1, r2, e, area, weight in kg/m, moment of inertia, section modulus and radius of gyration. Labelled drawing. - Table
Viscosity Conversion Chart: cP, cSt, Pa·s
Viscosity conversion chart: dynamic (mPa·s, cP, Pa·s, P, lb/(ft·s)) and kinematic (mm²/s, cSt, St, m²/s, ft²/s) viscosity equivalents, with common values. - Table
Greek Alphabet Chart: Letters, Names and Engineering Symbols
Greek alphabet chart: capital and lowercase forms of all 24 letters, their names in six languages and the engineering meanings of ρ, σ, τ, η, μ and ω.