I did it by eye

0 Hi everyone,02br
00I'm trying to find an expression that is really useful in Italian, but I don't know what's the equivalent in English. We say "by eye" (ITA: a occhio), is there something similar in English? It is used when you want to say that 01b00you do something without many calculations, tools or instruments, you just rely on your skills.02br
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02b00So if have to make a hole in the middle of a circle without taking any measurements, you make it "by eye", relying on what you see, your instinct and your skills. If you have make a cake but you don't have the recipe, you don't know how much flour and sugar you have to use, but if you are skilled enough you can "go by eye", your eye will tell you if the quantities are more or less ok. If draw a circle by hand, you also do it "by eye" because you have no tools to check whether it's ok or not, so it might seem ok "by eye".02br
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00Hope you understand, thank you in advance 050010id1