How does kilonewtons per sq metre translate to kilograms pr sq metre? This relates to loading of a roof.
Any advice appreciated
A kilonewton is 1000 N and a unit of force. At standard gravity (9.80665 m/s²), the force exerted on a 1 kg mass is 9.80665 N. So at standard gravity, the force on a mass of 101.972 kg is 1000 N or 1 kN.
I keep belaboring the point of "standard gravity" because gravity does vary slightly from equator to pole and with elevation above sea level, and the force acting on a mass changes (slightly) with changes in local gravity. At sea level, that change is around 0.5%, more with elevation.
However, with modest rounding, the force of gravity on earth acting on a 102 kg mass is 1 kN, at least close enough to give a feel for it.