15 rows · portrait
Metric coarse bolt chart (ISO 898-1)
Every metric coarse fastener size in the reference on one sheet: pitch, major and external minor diameters, tensile stress area, head height and diameter, and the across-flats wrench size.
12 sheets · 311 rows
Printable reference sheets
EngiRef reference sheets are printable engineering charts for the bench, plant room or site: bolts, pipe schedules, wire gauges, material properties, constants and a formula sheet per discipline. Each is a high-contrast table that prints black on white, with column headers repeating on every page and no row split across a page break.
Where the source publishes nothing for a row - the AWG table states no indicative current for several gauges, the material database no yield strength for materials that fracture before they yield - the sheet prints not defined and a numbered footnote saying so. It never fills a gap with an interpolated figure.
14 rows · portrait
UNC coarse bolt chart (ASME B1.1)
The Unified coarse series from the numbered sizes upward: threads per inch, major and internal minor diameters, tensile stress area and wrench size, all in millimetres.
40 rows · portrait
Pipe schedule chart (ASME B36.10M)
Nominal pipe sizes grouped by schedule: outside diameter, wall thickness, the resulting inside diameter, mass per metre and internal flow area - the sheet you want beside a cut list, not a browser tab.
39 rows · portrait
AWG wire gauge chart
American Wire Gauge from the zero series down: conductor diameter, cross-sectional area, resistance per kilometre, and the indicative chart currents - printed as not defined for the gauges the table does not publish them for.
56 rows · landscape
Material properties sheet
Every material in the reference, grouped by class: density, yield and ultimate strength, elastic and shear moduli, thermal conductivity, expansion and specific heat, melting point, Poisson's ratio and hardness. Where the database publishes no figure the cell says so.
28 rows · portrait
Physical constants sheet
Every constant in the reference, grouped by family: symbol, value at the source's own precision, and unit - the sheet to tape inside a lab notebook rather than look up one at a time.
34 rows · landscape
Mechanical engineering formula sheet
Every mechanical formula in the reference on one sheet, grouped by topic: the equation in plain text, what each symbol means and its unit, and the validity conditions the library states for it.
26 rows · landscape
Electrical engineering formula sheet
Every electrical formula in the reference on one sheet, grouped by topic: the equation in plain text, what each symbol means and its unit, and the validity conditions the library states for it.
16 rows · landscape
Civil engineering formula sheet
Every civil formula in the reference on one sheet, grouped by topic: the equation in plain text, what each symbol means and its unit, and the validity conditions the library states for it.
17 rows · landscape
Thermo engineering formula sheet
Every thermo formula in the reference on one sheet, grouped by topic: the equation in plain text, what each symbol means and its unit, and the validity conditions the library states for it.
14 rows · landscape
Fluids engineering formula sheet
Every fluids formula in the reference on one sheet, grouped by topic: the equation in plain text, what each symbol means and its unit, and the validity conditions the library states for it.
12 rows · landscape
Materials engineering formula sheet
Every materials formula in the reference on one sheet, grouped by topic: the equation in plain text, what each symbol means and its unit, and the validity conditions the library states for it.
What costs and what does not
The numbers are free. The sheet is not.
Every dimension, property, constant and formula on these sheets is free to read on its own reference page, in the reference tables and in the converter - no account, no paywall, forever. A sample of each sheet renders for everyone so you can judge the layout before deciding. Premium unlocks the complete print-ready sheets.