Plastics and 3D Printing Calculators

Every calculator and chart on the site, grouped by the job. Each one shows the formula and the steps with your numbers, keeps its inputs in the link so you can share or repeat a result, and prints a dated record. Nothing you type is uploaded.

3D printing

• 3D printing cost calculator — material, power, machine and labour cost of a print.
• 3D print time calculator — print time from volume, layer height and speed.
• Filament calculator — filament length and weight, spool remaining.
• Esteps calculator — extruder calibration and flow rate.
• Lithophane maker — turn a photo into a printable lithophane STL.

Plastics

• Plastic density chart — densities of HDPE, PP, PLA and other plastics.
• Plastic weight calculator — weight of sheet, rod, tube and pipe.
• Mil to mm converter — mil, mm, microns and film gauge.
• Recycling symbols chart — resin identification codes 1 to 7.
• Clamping force calculator — injection moulding clamp tonnage.
• Plexiglass thickness chart — acrylic sheet sizes in inch and mm, and sheet weight.
• Foam density chart — EPS, XPS, spray and memory foam densities, unit conversion and block weight.
• Plastic melting point chart — melting range and glass transition of 14 plastics, and the state at your temperature.
• Plastic bottle cap size chart — neck finish sizes such as 28-400 and a closure finder.

Resin, tubing and bags

• Epoxy resin calculator — resin for pours and river tables.
• Epoxy coverage calculator — coating coverage at any thickness.
• Heat shrink tubing size chart — size and shrink ratio finder.
• Trash bag size chart — can liner size from can dimensions.

Seals, rubber and fittings

• O-ring size chart — AS568 sizes in inch and mm, and a finder for a measured ring.
• O-ring groove calculator — squeeze, gland fill and stretch for a groove.
• Shore hardness chart — Shore 00, A and D scales with approximate A to D values.
• Grommet size chart — grommet sizes with hole and outside diameters, and a size finder.