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🔄 Unit Conversion Calculator

Convert between measurement systems quickly and accurately

Length Conversion

Torque Conversion

Quick Reference:
1 ft-lb = 1.356 Nm
1 Nm = 0.738 ft-lb
1 in-lb = 0.113 Nm

Decimal to Fraction

DecimalFractionDecimalFraction
0.06251/16"0.50001/2"
0.12501/8"0.56259/16"
0.18753/16"0.62505/8"
0.25001/4"0.75003/4"
0.31255/16"0.87507/8"
0.37503/8"1.00001"

Bolt Grade Equivalents

SAE Grade Metric Class Tensile Strength Material
Grade 2 4.6 / 4.8 60,000 psi Low carbon steel
Grade 5 8.8 120,000 psi Medium carbon steel
Grade 8 10.9 150,000 psi Alloy steel
- 12.9 180,000 psi Alloy steel
A307 4.6 60,000 psi Low carbon steel
A325 8.8 120,000 psi Structural bolt

Understanding Grade Markings:

SAE Grades: Look for radial lines on the bolt head. Grade 5 has 3 lines, Grade 8 has 6 lines.
Metric Classes: Numbers stamped on the bolt head (e.g., 8.8, 10.9).
Higher numbers = Higher strength