Every value computed from the governing standard — pick your exact size and condition instead of squinting at a wall chart.
Fasteners & Threads
| Bolt Torque | Tightening torque by size, grade & lubrication. | SAE J429 · ISO 898-1 |
| Tap Drill Size | Drill size for any thread & engagement %. | ASME B1.1 · ISO 724 |
| Clearance Hole | Through-hole size by bolt & fit (close/normal/loose). | ASME B18.2.8 · ISO 273 |
Machining
| Cutting Speed & RPM | SFM & spindle RPM by material, HSS or carbide, with feed. | Machinery's Handbook |
| Feed Rate & Chip Load | Feed per tooth by material & diameter, with feed rate. | Machinery's Handbook |
| Surface Finish | Ra ↔ Rz ↔ RMS roughness with N-grade chart. | ISO 4287 · ISO 1302 |
| Material Removal Rate | MRR for milling, turning & drilling. | ae × ap × vf |
| Machining Time | Cycle time from cut length, feed & RPM. | T = L / (f × N) |
Materials
| Metal Weight | Weight of bar, tube, plate & more, any material. | geometry × ρ |
| Hardness Conversion | HRC ↔ HB ↔ HV ↔ HK with ASTM E140 chart. | ASTM E140-12b |
Sheet Metal
| Sheet Metal Gauge | Gauge ↔ thickness for steel, stainless & aluminium. | Mfrs Std Gauge · B&S |
| Bend Allowance & K-Factor | Bend allowance, deduction & flat length by material. | Machinery's Handbook |
Power Transmission
| Chain Drive | Sprocket ratio, chain length & centre distance. | ASME B29.1 |
| Spring Rate | Compression spring k, spring index & Wahl factor. | k = Gd⁴/8D³Na |
Electrical
| Ohm’s Law | V, I, R, P — enter any two, solve the rest. | V = IR · P = IV |
| Voltage Drop | Wire voltage drop & % by gauge, length & current. | NEC Ch. 9 Table 8 |
Structural
| Moment of Inertia | Area second moment for 6 common cross-sections. | I = πd⁴/64 · bh³/12 |
Unit Conversion
| Pressure Converter | PSI, bar, kPa, MPa, atm, mmHg & more. | ISO 80000 · NIST |
| Temperature Converter | Celsius, Fahrenheit, Kelvin & Rankine. | NIST / ITS-90 |