how to convert micros() to seconds

Projects Programming
1

I just want to convert the micros() function output to actual seconds, but don't quite understand the reference page. I'm using Arduino Uno, which has a 16MHz oscillator, so according to the micros() reference page:

On 16 MHz Arduino boards (e.g. Duemilanove and Nano), this function has a resolution of four microseconds (i.e. the value returned is always a multiple of four).

When I run some simple print code (below) I get this as the first few lines of output:
1064,824
1908,824
2776,824

So how many seconds is 1064 micros()? If it's a multiple of 4 as indicated in the quote, that means
1064 micros() = 1064/4 microseconds = 266 microseconds = 0.000266 seconds
? This doesn't feel right. However, I'm not sure how to translate "resolution of four microseconds" quoted above.

2

micros returns the number of microseconds. The granularity (4) is irrelevant. To convert to seconds divide by one million.

3

Thanks! But can you explain more? I don't understand why The granularity (4) is irrelevant.

4

All it means is that, in effect, instead of incrementing a variable by one every microsecond, the variable is incremented by four every four microseconds.

5

ooohhhh okay great, thanks so much for such a quick reply!