Acre is an imperial measurment. Hectacre would be an analogous metric measurment.
English and Metric
I was taught the imperial system whilst a schoolboy in the UK, many years ago. So I prefer imperial rather than metric. But, as metric is becoming the norm, I have become familiar with both systems.
Metric or Imperial
metric and imperial metric- scientists use this method imperial- some countries still use this method
A gallon is certainly not metric. It is imperial.
metric allen wrenches, star sockets and bits, and metric sockets
Imperial.
Acre is an imperial measurment. Hectacre would be an analogous metric measurment.
Metric tons can't be converted to imperial gallons. Metric tons measure mass, while imperial gallons measure volume.
There is no such thing as a metric gallon. The metric measurement is litres. There are 4.54609188 litres to an imperial gallon.
A tonne is a metric measurement.
imperial - Elvinusa
English and Metric
The opposing systems are imperial and metric, not customary. But, meters are metric.
I'm guessing by customary, you mean imperial. if so inches are customary/imperial
Metric 6 point sockets are the most commonly used sockets today. American made vehicle used to only have standard bolt, but today they are being replaced by metric bolts like all other manufacturers.