Remix tree: https://scratch.mit.edu/projects/1011823482/remixtree 1 foot per hour = .0002 miles per hour 1 inch per hour = .083 feet per hour 1 centimetre per hour = .4 inches per hour 1 centimetre per year = .00011407711 centimetres per hour 1 centimetre per century = 0.01 centimetres per year 1 centimetre per millennium = 0.1 centimetres per century