Americans should use the Metric system the way Canadians do:
Temperature: Celsius. Unless it’s for cooking, or you’re talking about the temperature of a pool.
Length: Metric. Unless it’s talking about a person’s height. Or, you’re talking about lumber.
Mass / Weight: Pounds. Unless you’re talking small weights, then you use grams. If you’re shopping, it’s 50/50. If it’s really big weights it’s “tons” which might be metric or might not.
Volume: Metric. Except if you’re cooking. But, then when you’re cooking you have to figure out what a fl. oz. is because Canadian cans are in mL but the recipe is flozzameters.
Americans should use the Metric system the way Canadians do:
Temperature: Celsius. Unless it’s for cooking, or you’re talking about the temperature of a pool.
Length: Metric. Unless it’s talking about a person’s height. Or, you’re talking about lumber.
Mass / Weight: Pounds. Unless you’re talking small weights, then you use grams. If you’re shopping, it’s 50/50. If it’s really big weights it’s “tons” which might be metric or might not.
Volume: Metric. Except if you’re cooking. But, then when you’re cooking you have to figure out what a fl. oz. is because Canadian cans are in mL but the recipe is flozzameters.