MECHANICAL ENGINEERING 
Calculator

Definition 
Unit converter 
Converts between frequently
used engineering units of length, mass, force, pressure, power, temperature etc. 
Fastener calculators 
Calculates the fastener dimensions according to ASME standards.
Fasteners which are covered by the calculators are machine screws, hex and heavy hex bolts, hex
and heavy hex cap screws, hex machine screw nut, hex nuts and hex jam nuts, hex
slotted nuts, Acorn nuts, plain washers, helical spring lock washers, tooth lock
washer, hexagon and spline socket head cap screws, hexagon and spline socket flat countersunk head cap screws 
Limits, fits and tolerances calculators 
Calculates the limits, fits and tolerances
according to ISO 286(2010), ANSI B4.2 (1978) and ANSI B4.1 1967 (2004)
standards for metric and inch unit systems. There is also a calculator to calculate the press fit force, required temperatures for shrink fit,
fit stresses and other parameters necessary for interference fit design 
Coil springs calculators

Calculates compression and extension springs
parameters such as spring rate, shear stress, number of coils in spring, spring
buckling analysis, Wahl factor. 
Mass moment of inertia calculators 
Calculates mass moment of inertia values of typical bodies. 
Screw thread calculators 
Calculates Unified inch screw thread sizes, ISO
metric screw thread sizes, ISO metric trapezoidal thread sizes, General purpose
Acme screw thread sizes, Stub Acme screw thread sizes, Buttress screw thread
dimensions, tap drill sizes for Unified inch and metric threads, clearance holes, drill and counterbore sizes for socket head cap screws ,torque and
tightening values, Leadscrew torque and efficiency values calculations, Helicoil tapped hole dimensions, Helicoil length selection, NPT pipe threads and drill sizes, BSP, BSPP and BSPT pipe thread sizes and dimensions. 
Tools, bits and keys calculators 
Shows dimensions of hex (allen) and spline keys and bits, straight shank jobbers, screw machine length and taper length, and taper shank drill bits. 