Three calculators for the numbers that come up constantly on the bench or in the field — bending, flow, and how hard to turn the wrench. Pick one below.
Deflection, bending stress, and safety factor for five standard support & load cases — load, shear, moment, and deflection drawn live.
Darcy–Weisbach head loss with a live Moody diagram — flow rate, pipe size, material, and fluid in, pressure drop out.
Pick a bolt size, grade, and lubrication condition — get the installation torque, with a realistic ±25% uncertainty band.