Engineering Charts and Tables

Engineering Reference Charts, Tables, Graphs, and Lookup Data

Turn2Engineering provides free engineering charts and tables for engineers, students, technicians, contractors, designers, and other users who need dependable reference information without searching through scattered documents. The library is organized around practical lookup tasks such as comparing wire ampacity, checking pipe dimensions, reviewing structural sizes, selecting fasteners, converting engineering units, inspecting material properties, and understanding how one engineering variable changes with another.

Individual reference pages may include searchable tables, sortable columns, unit-system controls, row filters, comparison charts, dimensioned diagrams, interactive curves, reverse lookups, copy and print tools, and accessible HTML data. The primary chart or table should appear immediately near the top of each page so users can complete the main lookup before reading the supporting explanation.

Browse Engineering Charts and Tables by Discipline

Electrical engineering references include wire ampacity charts, AWG dimensions, cable sizes, voltage-drop tables, motor current charts, breaker sizes, conduit fill, resistor codes, and enclosure ratings. Mechanical references cover bearings, belts, gears, shafts, chains, seals, lubrication, torque, and power transmission. Civil and structural tables include steel shapes, rebar sizes, concrete data, lumber dimensions, span charts, soil classifications, slopes, drainage coefficients, and hydraulic roughness values.

Piping and fluid-mechanics references include pipe sizes, schedules, flow rates, friction loss, Moody-chart data, valve coefficients, flanges, threads, steam properties, fluid density, viscosity, and pump curves. HVAC and refrigeration references cover duct sizing, duct friction, airflow, air changes, refrigerant pressure-temperature relationships, psychrometrics, dew point, insulation, and equipment sizing. Material-property tables compare density, strength, stiffness, conductivity, thermal expansion, hardness, emissivity, resistivity, and compatibility.

How to Use the Engineering Reference Library

Search for the exact item you need, such as “wire ampacity,” “pipe schedule,” “steel beam size,” “bolt torque,” “duct size,” “refrigerant pressure temperature,” or “material density.” You can also choose a discipline filter, expand a category, and compare related references. On an individual page, verify the selected unit system, material, grade, standard, temperature, pressure class, or other condition before using a value.

Data Sources, Standards, and Engineering Limitations

Reference values can change with source, edition, material grade, manufacturing tolerance, installation condition, temperature, pressure, jurisdiction, and applicable code. Each child page should identify its source basis, units, important assumptions, and last verification date. Where a complete standards table cannot be legally reproduced, the page should use an original calculation, transformed educational reference, limited excerpt, or direct link to the controlling source rather than copying protected data.

These charts and tables are intended for education, preliminary design, comparison, estimating, and verification. They do not replace applicable codes, project specifications, manufacturer data, calibrated software, or professional engineering judgment.