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Disclaimer: The calculators and tools provided on this website are for informational and educational purposes only. They are not intended to be a substitute for professional advice, diagnosis, or treatment. Web Ocean Security assumes no liability for any errors or omissions in the content or for any damages resulting from the use of these tools. Always consult with a qualified professional for specific safety and health concerns.

Friction Coefficient (COF) Tool

Reference guide for Coefficient of Friction (COF) values to prevent slips, trips, and falls.

Common COF Values
SurfaceCOF Range
Concrete (Dry)0.60 - 0.85
Concrete (Wet)0.45 - 0.65
Tile (Ceramic, Dry)0.60 - 0.70
Tile (Ceramic, Wet)0.10 - 0.40
Wood (Polished)0.20 - 0.50
Steel (Diamond Plate)0.75
Ice0.10
Asphalt0.90
Safety Standards
StandardMin COF
OSHA
Recommended minimum for walking surfaces.
0.50
ADA
Recommended for accessible routes.
0.60
ADA (Ramps)
Recommended for ramps.
0.80

Understanding COF

The Coefficient of Friction (COF) measures the slip resistance of a surface. A higher number means more traction. Surfaces with COF below 0.50 are generally considered unsafe for walking.

Ramp Safety Calculator
Calculate the required Friction Coefficient based on ramp slope.
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