What does R&D to Sales mean?
This is calculated by dividing Research & Development Expense by total sales or revenue. R&D expense is not always broken out in a company's financials, however, so this value may be n/a in those cases.
Stockopedia explains R&D to Sales...
This metric is useful in comparing the effectiveness of R&D expenditures between companies in the same industry. It is less obvious across industries - for example, pharmaceuticals and software companies tend to spend a lot on R&D while consumer product companies spent less.