Some Help Developing Fictional Measurements

Here are my notes for how things are measured in the Kingdom of the Compact:

Measurements

Length

Solar Mile, aka Sol = Unit of length. Originally defined as one hundred-millionth of the average distance between the Earth and the Sun. Today the standard definition is one thousand times the distance between two fine, incised lines in the polished top surface of a slab of quartz in the Department of Measures building in Avignon. From this standard most other official measurements in the Compact are derived.

1 Solar Mile = 1 Sol = one thousand New Toise = 4600 Solar Feet ( = 0.93 statute miles = 4910.4 statute feet = 58924.8 statute inches = 1.5 kilometers = 1500 meters)
1 New Toise (pronounced "toys," plural: toises) = 1/1000 of a Solar Mile = 4.6 Solar Feet ( = 4.9104 statute feet = 1.497 meter)
(The old toise - well, one of the most common of them - was 1.949 meter, the same as the fathom - well, one of them.)
1 Solar Foot = 12 Solar Inches ( = 32.6 cm = 1.07 statute feet = 12.84 statute inches)
1 Solar Inch ( = 2.72 cm = 1.07 statute inches)

Volume

1 Dram = 0.5 cubic Solar Inch ( = 2.52 ml)
1 Roquille = 1 cubic Solar Inch = 8 Drams ( = 20.16 ml)
1 Pinte = 3 cubic Solar Inches = 27 Roquilles = 216 Drams ( = 544.32 ml)
1 Velte = 10 cubic Solar Inches = 1000 Roquilles = 37.037 Pinte ( = 20.16 liters)
1 Cubique = 1 cubic Solar Foot = 1.728 Velte = 64 Pinte ( = 34.837 liters)
1 Cubic Toise = 1 cubic New Toise = 97.336 Cubique = 168.2 Velte = 6229.5 Pinte ( = 3391 liters)

Weight/Mass/Force

1 Grain = 1/10th Roquille of water ( = ~2 mg)
10 Grains = 1 Roquille of water ( = ~20 mg)
1 Cinqcents Grain = 5 Roquille of water ( = ~1 g)
1 Once = 20 Cinqcents = 100 Roquille of water ( = ~20 g)
1 Livre = 25 Ounces ( = ~500 g)
1 Talent = 2500 Livre ( = ~50 kg)
1 Millelivre = 10 Talents ( = ~500 kg)
1 Ton = 2 Millelivre ( = ~1000 kg)

Time

Same as ours.

Money

1 Copper coin
1 Silver coin = 1 Sous = 100 Copper coins
1 Silver bar = 1 Livre = 20 Silver coins (historically, one pound of silver; here 500 grams or 1 livre weight)
1 Gold coin = 1 Crown = 10 Silver coins = 1/2 Silver bar
Small gold bar = ? = 10 Gold coins
Large gold bar = ? = 10 Small bars

It's largely based on pre-Revolutionary French units. I'd appreciate comments on the system, especially if someone finds I've made a math error. I'd also appreciate names for the small gold bar and large gold bar.