Machining unit converter

Notes

• 1 inch = 25.4 mm exactly; 1 thou = 0.001" = 0.0254 mm.
• Cutting speed: 1 m/min ≈ 3.281 SFM (surface feet per minute).
• Feed per rev or per tooth: 0.1 mm ≈ 0.0039" (about 4 thou).
• Torque: 1 N·m ≈ 0.738 lbf·ft ≈ 8.85 lbf·in.
• Stress: 1 MPa = 1 N/mm² ≈ 145 psi; 1 ksi ≈ 6.895 MPa.

Conversion factors from the international yard and pound (1959) and standard gravity 9.80665 m/s². Values are for reference only.