# Best possible metric vs imperial conversion table?

Is there a better, smarter way of structuring a metric vs imperial conversion table than the one below?

I.e. for a spreadsheet for calculating storage / shipping costs for products whose suppliers use different unit systems.

Length

Metric                Imperial

1 mm                  0.03937 in
1 cm        10 mm     0.3937 in
1 m         100 cm    1.0936 yd

Imperial              Metric

1 in                  2.54 cm
1 ft        12 in     0.3048 m
1 yd        3 ft      0.9144 m


Volume

Metric                Imperial

1 cm3                 0.0610 in3
1 dm3     1,000 cm3   0.0353 ft3
1 m3      1,000 dm3   1.3080 yd3
1 l       1 dm3       1.76 pt

Imperial              Metric

1 in3                 16.387 cm3
1 ft3     1,728 in3   0.0283 m3
1 fl oz               28.413 ml
1 pt      20 fl oz    0.5683 l

USA measure                               Metric

1 fl oz               1.0408 uk fl oz     29.574 ml
1 pint (16 fl oz)     0.8327 uk pt        0.4731 l
1 gallon              0.8327 uk gal       3.7854 l


Mass

Metric                Imperial

1 mg                  0.0154 grain
1 g      1,000 mg     0.0353 oz
1 kg     1,000 g      2.2046 lb

Imperial              Metric

1 oz     437.5 grain  28.35 g
1 lb     16 oz        0.4536 kg
1 stone  14 lb        6.3503 kg
1 cwt    112 lb       50.802 kg


Edit

Length:  1 m = N in / N ft / N yd
Volume:  1 m3 = N in3 / N ft3 / N yd3
Weight:  1 kg = N oz / N lb

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I don't think there will be an objective standard for "best possible." In what ways is this table deficient for you? (Also, I removed the metric-spaces tag since that's actually something totally unrelated to the metric system.) – Nate Eldredge Jun 24 '12 at 0:26
Hello Nate! It's not deficient per se - I just got a feeling it can be radically simplified, but I don't know really. – Mark Boulder Jun 24 '12 at 9:55