Free Industrial Calculators

1 sut = 1/8 inch = 3.175 mm. Instant two-way converter used across Indian hardware shops.

Instantly convert any gauge number (SWG, BWG, AWG) to millimetre thickness. Used for sheet metal, wire, and pipes.

Enter bore (mm), rod diameter (mm), and pressure (bar) — get push and pull force in kgf and Newton.

Enter bore, stroke, cycles/min, and pressure — get free air consumption in L/min and CFM for sizing compressor + FRL.

Enter airflow (CFM or NL/min), pipe length, and pressure — get minimum recommended pipe inside diameter + velocity check.

Decode any ISO / SKF bearing designation into its physical dimensions and type. 6205 → bore 25, OD 52, width 15 mm.

Enter basic dynamic load rating C, applied load P, and rpm — get L10 life in hours + revolutions.

The reverse of a bearing decoder: enter the three physical dimensions of an unmarked / worn bearing and find the matching bearing number(s).

Enter bolt size, grade, and thread lubrication — get recommended tightening torque in Nm and kgf·m.

Converts threads-per-inch (TPI) to millimetre pitch and vice versa. Covers Metric coarse, fine, BSP, NPT, UNC, and UNF threads.

Enter the tap size (M-number or BSP) — get the exact pilot drill diameter you need to drill before tapping.

Enter the bolt size (M3–M30) and screw type (SHCS, set screw, countersunk) — get the exact allen / hex key size.

Enter small pulley Ø, big pulley Ø, and center distance — get belt length in mm and inches. Supports A, B, C, D, Z, SPZ, SPA, SPB sections.

Enter driver pulley Ø, driven pulley Ø, and driver RPM — get output RPM, speed ratio, and belt linear speed in m/s.

Enter drill diameter and material — get spindle speed (RPM) and feed rate (mm/rev). Works for HSS and carbide drills.

Match imperial AF (across flats) wrench sizes to their metric equivalents. Also: pick the right wrench for any M-size bolt.

Enter bearing bore and width — get grease quantity for repacking (grams) and relubrication interval.

Instantly convert between ISO VG grades, SAE engine/gear oil grades, and cSt viscosity at 40°C.

Enter load current, cable length, voltage, and phase — get minimum cable size that satisfies both ampacity and voltage drop.

Enter motor power (kW or HP), voltage, and phase — get running current (FLA) and starting current estimate.

Enter wheel diameter and max surface speed — get maximum safe RPM. Prevents wheel disintegration.