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I would like to change the number of digit of decimal point when I calculate area.

For example Now: 32.456677 Ideal: 32.46

I try to adjust "output field width" and "Precision" These don't work well.

Let me know how to adjust the number of digit of decimal points.

Thank you in advance.

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You are right!! I got success. Appreciate! – Jermain Marthin Jan 30 '13 at 20:13
@JermainMarthin: I'm glad it helps! I've posted my comment as an answer, it would be good if you could mark it as accepted by clicking the tick mark next to the answer. – Jake Jan 30 '13 at 20:28

The rounding to two decimal places is only applied after you click "Save" in the Field Calculator. Setting Precision to 2 and Width to something large like 10 should work.

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In QGIS Master, you may also have to leave edit mode and/or close and reopen the attribute table. There is also a new round function in Master, see… – AndreJ Jan 30 '13 at 20:43

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