Convert Metres per Second to Inches per Hour (m/s to in/h)

Formula

in/h = m/s × 141732.2834646

Derivation from SI units:

• Hydraulic conductivity K = discharge per unit area per unit hydraulic gradient, in m/s.
• 1 in/h = 0.0254/3600 m/s.

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

Worked examples

1. A reading of 0.0000001 m/s converts to 0.01417322835 in/h.
   0.0000001 m/s × 141732.2835 = 0.01417322835 in/h
2. A value of 0.0001 m/s is 14.17322835 in/h.
   0.0001 m/s × 141732.2835 = 14.17322835 in/h

Where it's used

Metres per Second are used for darcy’s law and seepage analysis, 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.

Metre 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.