22 sourced calculation tools — each on its own page, with its verification status.
Select materials by weight-performance trade-off with a log-log comparison
Brand-specific minimum bend radius / thickness ratio for high-strength steel plate
🔧Preload force and tightening torque calculation for a metric bolt
🔩Axial stress and safety factor check
🔥Approximate current, voltage, and heat input estimate for MIG/MAG and stick welding
🏗️Deflection and maximum moment calculation for 4 support/load cases
⚙️Required shaft diameter under bending + torsion (von Mises / DE-ASME criterion)
🛡️Thickness-dependent hardness (Brinell) range lookup for US military armor steel specifications
〰️Natural frequency and damping ratio of a mass-spring-damper system
Percent voltage drop check based on line length and cross-section (single-phase / three-phase)
⚡Voltage, current, resistance, and power from any two known quantities
🎨4-band resistor value solver — live visual display
📻RC/RL cutoff frequency and LC resonant frequency calculation
Friction loss, Reynolds number, and flow regime via the Darcy-Weisbach equation
🌡️Heat loss and U-value calculation via a convection + conduction thermal resistance network
⛽Hydraulic, shaft, and electrical power calculation; standard motor selection