Low bridges

I had just entered Canada on my way to Alaska. I crossed at Sweetgrass, MT. and was content that my speedometer had both MPH and KPH on it. What I didn't have was a feet/meter table with me. In Calgary, I came to a bridge with a superstructure and the clearance height measured in meters. I knew my height in feet. I pulled over, pulled out the laptop and I was good to go. You would have thought that I would have converted ounces to grams while I was at it, but I didn't. I stopped at a grocery store later and hit the deli counter. Everything was in grams per Canadian Dollar. So I just ordered 8 slices. And I still don't know that conversion.