diff --git a/src/si/specific_volume.rs b/src/si/specific_volume.rs
index 891f0f29..2ba62233 100644
--- a/src/si/specific_volume.rs
+++ b/src/si/specific_volume.rs
@@ -13,16 +13,112 @@ quantity! {
         Z0,     // amount of substance
         Z0>;    // luminous intensity
     units {
-        @cubic_meter_per_kilogram: prefix!(none); "m³/kg", "cubic meter per kilogram",
-            "cubic meters per kilogram";
-        @cubic_centimeter_per_kilogram: prefix!(centi) * prefix!(centi) * prefix!(centi); "cm³/kg",
-            "cubic centimeter per kilogram", "cubic centimeters per kilogram";
 
-        @cubic_meter_per_gram: prefix!(none) / prefix!(milli); "m³/g", "cubic meter per gram",
-            "cubic meters per gram";
-        @cubic_centimeter_per_gram:
-            prefix!(centi) * prefix!(centi) * prefix!(centi) / prefix!(milli); "cm³/g",
+        @cubic_meter_per_yottagram: prefix!(kilo) / prefix!(yotta); "m³/Yg",
+            "cubic meter per yottagram", "cubic meters per yottagram";
+        @cubic_meter_per_zettagram: prefix!(kilo) / prefix!(zetta); "m³/Zg",
+            "cubic meter per zettagram", "cubic meters per zettagram";
+        @cubic_meter_per_exagram: prefix!(kilo) / prefix!(exa); "m³/Eg",
+            "cubic meter per exagram", "cubic meters per exagram";
+        @cubic_meter_per_petagram: prefix!(kilo) / prefix!(peta); "m³/Pg",
+            "cubic meter per petagram", "cubic meters per petagram";
+        @cubic_meter_per_teragram: prefix!(kilo) / prefix!(tera); "m³/Tg",
+            "cubic meter per teragram", "cubic meters per teragram";
+        @cubic_meter_per_gigagram: prefix!(kilo) / prefix!(giga); "m³/Gg",
+            "cubic meter per gigagram", "cubic meters per gigagram";
+        @cubic_meter_per_megagram: prefix!(kilo) / prefix!(mega); "m³/Mg",
+            "cubic meter per megagram", "cubic meters per megagram";
+        /// Derived unit of specific volume.
+        @cubic_meter_per_kilogram: prefix!(kilo) / prefix!(kilo); "m³/kg",
+            "cubic meter per kilogram", "cubic meters per kilogram";
+        @cubic_meter_per_hectogram: prefix!(kilo) / prefix!(hecto); "m³/hg",
+            "cubic meter per hectogram", "cubic meters per hectogram";
+        @cubic_meter_per_decagram: prefix!(kilo) / prefix!(deca); "m³/dag",
+            "cubic meter per decagram", "cubic meters per decagram";
+        @cubic_meter_per_gram: prefix!(kilo) / prefix!(none); "m³/g",
+            "cubic meter per gram", "cubic meters per gram";
+        @cubic_meter_per_decigram: prefix!(kilo) / prefix!(deci); "m³/dg",
+            "cubic meter per decigram", "cubic meters per decigram";
+        @cubic_meter_per_centigram: prefix!(kilo) / prefix!(centi); "m³/cg",
+        "cubic meter per centigram", "cubic meters per centigram";
+        @cubic_meter_per_milligram: prefix!(kilo) / prefix!(milli); "m³/mg",
+            "cubic meter per milligram", "cubic meters per milligram";
+        @cubic_meter_per_microgram: prefix!(kilo) / prefix!(micro); "m³/µg",
+            "cubic meter per microgram", "cubic meters per microgram";
+        @cubic_meter_per_nanogram: prefix!(kilo) / prefix!(nano); "m³/ng",
+            "cubic meter per nanogram", "cubic meters per nanogram";
+        @cubic_meter_per_picogram: prefix!(kilo) / prefix!(pico); "m³/pg",
+            "cubic meter per picogram", "cubic meters per picogram";
+        @cubic_meter_per_femtogram: prefix!(kilo) / prefix!(femto); "m³/fg",
+            "cubic meter per femtogram", "cubic meters per femtogram";
+        @cubic_meter_per_attogram: prefix!(kilo) / prefix!(atto); "m³/ag",
+            "cubic meter per attogram", "cubic meters per attogram";
+        @cubic_meter_per_zeptogram: prefix!(kilo) / prefix!(zepto); "m³/zg",
+            "cubic meter per zeptogram", "cubic meters per zeptogram";
+        @cubic_meter_per_yoctogram: prefix!(kilo) / prefix!(yocto); "m³/yg",
+            "cubic meter per yoctogram", "cubic meters per yoctogram";
+
+        @cubic_meter_per_carat: 5.0_E3; "m³/ct",
+            "cubic meter per carat", "cubic meters per carat";
+        @cubic_meter_per_grain: 1.543_235_835_294_143_2_E4; "m³/gr",
+            "cubic meter per grain", "cubic meters per grain";
+        @cubic_meter_per_hundredweight_long: 1.968_412_878_538_099_E-2; "m³/cwt long",
+            "cubic meter per hundredweight (long)", "cubic meters per hundredweight (long)";
+        @cubic_meter_per_hundredweight_short:2.204_622_476_037_958_2_E-2; "m³/cwt short",
+            "cubic meter per hundredweight (short)", "cubic meters per hundredweight (short)";
+        @cubic_meter_per_ounce: 3.527_396_583_786_957_E1; "m³/oz",
+            "cubic meter per ounce", "cubic meters per ounce";
+        @cubic_meter_per_ounce_troy: 3.215_074_326_088_270_6_E1; "m³/oz t",
+            "cubic meter per troy ounce", "cubic meters per troy ounce";
+        @cubic_meter_per_pennyweight: 6.430_14_865_217_654_E2; "m³/dwt",
+            "cubic meter per pennyweight", "cubic meters per pennyweight";
+        @cubic_meter_per_pound: 2.204_622_476_037_958_5_E0; "m³/lb",
+            "cubic meter per pound", "cubic meters per pound";
+        @cubic_meter_per_pound_troy: 2.679_229_035_769_583_E0; "m³/lb t",
+            "cubic meter per troy pound", "cubic meters per troy pound";
+        @cubic_meter_per_slug: 6.852_177_964_766_101_E-2; "m³/slug",
+            "cubic meter per slug", "cubic meters per slug";
+        @cubic_meter_per_ton_assay: 3.428_571_036_734_739_E1; "m³/AT",
+            "cubic meter per assay ton", "cubic meters per assay ton";
+        @cubic_meter_per_ton_long: 9.842_064_392_690_496_E-4; "m³/2240 lb",
+            "cubic meter per long ton", "cubic meters per long ton";
+        @cubic_meter_per_ton_short: 1.102_311_359_527_999_E-3; "m³/2000 lb",
+            "cubic meter per short ton", "cubic meters per short ton";
+        @cubic_meter_per_ton: 1.0_E-3; "m³/t",
+            "cubic meter per ton", "cubic meters per ton";
+
+        @gallon_per_grain: 5.841_783_449_752_474_E1; "gal/gr",
+            "gallon per grain", "gallons per grain";
+        @cubic_centimeter_per_gram: 1.0_E-3; "cm³/g",
             "cubic centimeter per gram", "cubic centimeters per gram";
+        @cubic_centimeter_per_kilogram: prefix!(centi) * prefix!(centi) * prefix!(centi); "cm³/kg",
+            "cubic centimeter per kilogram", "cubic centimeters per kilogram";
+        @cubic_inch_per_ounce: 5.780_365_946_231_19_E-4; "in³/oz",
+            "cubic inch per ounce", "cubic inches per ounce";
+        @gallon_imperial_per_ounce:1.603_586_233_558_804_4_E-1; "gal (UK)/oz",
+            "Imperial gallon per ounce", "Imperial gallons per ounce";
+        @gallon_per_ounce: 1.335_264_935_702_615_E-1; "gal/oz",
+            "gallon per ounce", "gallons per ounce";
+        @cubic_foot_per_pound: 6.24_279_639_605_954_6_E-2; "ft³/lb",
+            "cubic foot per pound", "cubic feet per pound";
+        @cubic_inch_per_pound: 3.612_728_079_218_259_E-5; "in³/lb",
+            "cubic inch per pound", "cubic inches per pound";
+        @cubic_yard_per_pound: 1.685_554_916_704_953_7_E0; "yd³/lb",
+            "cubic yard per pound", "cubic yards per pound";
+        @gallon_imperial_per_pound: 1.002_241_219_209_140_1_E-2; "gal (UK)/lb",
+            "Imperial gallon per pound", "Imperial gallons per pound";
+        @gallon_per_pound: 8.345_404_376_263_8_E-3; "gal/lb",
+            "gallon per pound", "gallons per pound";
+        @cubic_foot_per_slug: 1.940_320_956_015_869_7_E-3; "ft³/slug",
+            "cubic foot per slug", "cubic feett per slug";
+        @cubic_yard_per_ton_long: 7.524_798_557_547_043_E-4; "yd³/2240 lb",
+            "cubic yard per long ton", "cubic yards per long ton";
+        @cubic_yard_per_ton_short: 8.427_775_512_527_934_E-4; "yd³/2000 lb",
+            "cubic yard per short ton", "cubic yards per short ton";
+        @cubic_foot_per_ton_long: 2.786_962_610_981_578_5_E-5; "ft³/2240 lb",
+            "cubic foot per long ton", "cubic feet per long ton";
+        @cubic_foot_per_ton_short: 3.121_398_542_105_042_4E-5; "ft³/2000 lb",
+            "cubic foot per short ton", "cubic feet per short ton";
     }
 }
 
@@ -44,13 +140,61 @@ mod tests {
 
         #[test]
         fn check_units() {
+            test::<a::cubic_meter, m::yottagram, sv::cubic_meter_per_yottagram>();
+            test::<a::cubic_meter, m::zettagram, sv::cubic_meter_per_zettagram>();
+            test::<a::cubic_meter, m::exagram, sv::cubic_meter_per_exagram>();
+            test::<a::cubic_meter, m::petagram, sv::cubic_meter_per_petagram>();
+            test::<a::cubic_meter, m::teragram, sv::cubic_meter_per_teragram>();
+            test::<a::cubic_meter, m::gigagram, sv::cubic_meter_per_gigagram>();
+            test::<a::cubic_meter, m::megagram, sv::cubic_meter_per_megagram>();
             test::<a::cubic_meter, m::kilogram, sv::cubic_meter_per_kilogram>();
-            test::<a::cubic_centimeter, m::kilogram, sv::cubic_centimeter_per_kilogram>();
+            test::<a::cubic_meter, m::hectogram, sv::cubic_meter_per_hectogram>();
+            test::<a::cubic_meter, m::decagram, sv::cubic_meter_per_decagram>();
             test::<a::cubic_meter, m::gram, sv::cubic_meter_per_gram>();
+            test::<a::cubic_meter, m::decigram, sv::cubic_meter_per_decigram>();
+            test::<a::cubic_meter, m::centigram, sv::cubic_meter_per_centigram>();
+            test::<a::cubic_meter, m::milligram, sv::cubic_meter_per_milligram>();
+            test::<a::cubic_meter, m::microgram, sv::cubic_meter_per_microgram>();
+            test::<a::cubic_meter, m::nanogram, sv::cubic_meter_per_nanogram>();
+            test::<a::cubic_meter, m::picogram, sv::cubic_meter_per_picogram>();
+            test::<a::cubic_meter, m::femtogram, sv::cubic_meter_per_femtogram>();
+            test::<a::cubic_meter, m::attogram, sv::cubic_meter_per_attogram>();
+            test::<a::cubic_meter, m::zeptogram, sv::cubic_meter_per_zeptogram>();
+            test::<a::cubic_meter, m::yoctogram, sv::cubic_meter_per_yoctogram>();
+            test::<a::cubic_meter, m::carat, sv::cubic_meter_per_carat>();
+            test::<a::cubic_meter, m::grain, sv::cubic_meter_per_grain>();
+            test::<a::cubic_meter, m::hundredweight_long, sv::cubic_meter_per_hundredweight_long>();
+            test::<a::cubic_meter, m::hundredweight_short, sv::cubic_meter_per_hundredweight_short>();
+            test::<a::cubic_meter, m::ounce, sv::cubic_meter_per_ounce>();
+            test::<a::cubic_meter, m::ounce_troy, sv::cubic_meter_per_ounce_troy>();
+            test::<a::cubic_meter, m::pennyweight, sv::cubic_meter_per_pennyweight>();
+            test::<a::cubic_meter, m::pound, sv::cubic_meter_per_pound>();
+            test::<a::cubic_meter, m::pound_troy, sv::cubic_meter_per_pound_troy>();
+            test::<a::cubic_meter, m::slug, sv::cubic_meter_per_slug>();
+            test::<a::cubic_meter, m::ton_assay, sv::cubic_meter_per_ton_assay>();
+            test::<a::cubic_meter, m::ton_long, sv::cubic_meter_per_ton_long>();
+            test::<a::cubic_meter, m::ton_short, sv::cubic_meter_per_ton_short>();
+            test::<a::cubic_meter, m::ton, sv::cubic_meter_per_ton>();
+
+            test::<a::gallon, m::grain, sv::gallon_per_grain>();
             test::<a::cubic_centimeter, m::gram, sv::cubic_centimeter_per_gram>();
+            test::<a::cubic_centimeter, m::kilogram, sv::cubic_centimeter_per_kilogram>();
+            test::<a::cubic_inch, m::ounce, sv::cubic_inch_per_ounce>();
+            test::<a::gallon_imperial, m::ounce, sv::gallon_imperial_per_ounce>();
+            test::<a::gallon, m::ounce, sv::gallon_per_ounce>();
+            test::<a::cubic_foot, m::pound, sv::cubic_foot_per_pound>();
+            test::<a::cubic_inch, m::pound, sv::cubic_inch_per_pound>();
+            test::<a::cubic_yard, m::pound, sv::cubic_yard_per_pound>();
+            test::<a::gallon_imperial, m::pound, sv::gallon_imperial_per_pound>();
+            test::<a::gallon, m::pound, sv::gallon_per_pound>();
+            test::<a::cubic_foot, m::slug, sv::cubic_foot_per_slug>();
+            test::<a::cubic_yard, m::ton_long, sv::cubic_yard_per_ton_long>();
+            test::<a::cubic_yard, m::ton_short, sv::cubic_yard_per_ton_short>();
+            test::<a::cubic_foot, m::ton_long, sv::cubic_foot_per_ton_long>();
+            test::<a::cubic_foot, m::ton_short, sv::cubic_foot_per_ton_short>();
 
             fn test<A: a::Conversion<V>, M: m::Conversion<V>, SV: sv::Conversion<V>>() {
-                Test::assert_eq(&SpecificVolume::new::<SV>(V::one()),
+                Test::assert_approx_eq(&SpecificVolume::new::<SV>(V::one()),
                     &(Volume::new::<A>(V::one()) / Mass::new::<M>(V::one())));
             }
         }