Because stubborn, I'd hate to use imprecise divisor when there's perfectly exact multiplier. Because lazy to remember or look up, I usually use atan2(0,-1) for PI. It's illogical and futile with floating point maths, but perhaps, just perhaps, if volumes are summed all year round, eliminating tiny-tiny error will save me a millilitre of chlorine...

In reply to Re: Cubic inch to litre calculations by vr
in thread Cubic inch to litre calculations by stevieb

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