Cubic feet to liters (cu ft to L)

One cubic foot is exactly 28.31684659 liters. That is a definition rather than a measurement: the imperial and US customary units were fixed against metric ones by the 1959 international yard and pound agreement, so this factor does not drift and will not be revised.

Worked through: 10 cu ft x 28.3168466 = 283.168 L.

Going the other way, one liter is 0.0353146667 cubic feet.

For mental arithmetic: Multiply by 28.3, or by 30 and take off 6%.

Refrigerators, car boots and backpacks are where this pair turns up, because the US quotes capacity in cubic feet and most of the world in liters. A 20 cubic foot fridge is 566 liters. Car cargo space is the case where converting is not enough: US figures generally follow an SAE method and European ones the VDA method, which measures by fitting standard 1-liter blocks, so the same boot measured both ways produces two figures that disagree even after conversion. Compare cars against a single method, not a converted one.

Precision is worth matching to the input. A measurement given as 1 cu ft carries one or two significant figures, and reporting its conversion to six implies a precision the original never had.