Centimetres per Second to Inches per Hour (cm/s to in/h)

Formula

in/h = cm/s × 1417.322834646

Derivation from SI units:

• 1 cm/s = 0.01 m/s.
• 1 in/h = 0.0254/3600 m/s.
• 1 cm/s = 0.01 m/s ÷ 0.000007055555555556 m/s per in/h = 1417.322834646 in/h

Both units are defined exactly, so the factor is exact. Centimetre per Second definition: centimetre per second; Inch per Hour definition: inch per hour.

Worked examples

1. A reading of 0.0001 cm/s converts to 0.1417322835 in/h.
   0.0001 cm/s × 1417.322835 = 0.1417322835 in/h
2. A value of 0.1 cm/s is 141.7322835 in/h.
   0.1 cm/s × 1417.322835 = 141.7322835 in/h

Where it's used

Centimetres per Second are used for constant-head and falling-head permeability tests, while inches per hour appear in USDA soil survey permeability classes. Both measure hydraulic conductivity (coefficient of permeability k), so the conversion is a fixed factor.

Centimetre per Second to other hydraulic conductivity units

Frequently asked questions

Sources

• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units) and Table 8 (non-SI units accepted for use with the SI).
• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "inch".

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.