The following is a listing of conversion formulae used here at iSoaker.com.

Weight

1 oz. = 28.35 g
1 kg = 2.20161 lbs
1 lbs = 0.454213 kg
16 oz. = 1 lb
1000 g = 1 kg

Note: Water weaponry weights are accurate to within 5g.

Length/Range

1" = 2.54 cm
1' = 30 cm
12" = 1' = 0.333 yds
100 cm = 1 m

Note: Lengths are accurate to within 0.5cm.
Ranges are accurate to within 12". (Due to accuracy in determining the stream end-point)

Volume

1L = 1.0567 qt.
1 fl. oz. = 30 mL
16 oz = 1 cup = 0.25 qt
1000 mL = 1L

Note: Measuring accuracy for volumes less than 50mL is within 1mL. For volumes larger than 50mL, accuracy drops to within 5mL.