A carpenter in the US is unlikely to measure wood in 10ths of an inch. I make 120cm to be about 47.2441 inches - or almost 3 feet, 11 1/4 inches. Before we quib

A carpenter in the US is unlikely to measure wood in 10ths of an inch. I make 120cm to be about 47.2441 inches - or almost 3 feet, 11 1/4 inches. Before we quibble over decimal precision, how wide is the saw blade? Anyone in need of serious wood-butchering arithmetic should find the instructions that should come with an L-shaped carpenter's framing square, and learn what all the various scales can be used for - it's like a slide rule for wooden construction. https://en.wikipedia.org/wiki/Steel_square https://en.wikipedia.org/wiki/Steel_square