Unit Conversions & Dimensional Analysis: Factor Chains, Rates & Mixed Units

What you'll build

What you will be able to do

Each lab ends with a concrete result that you build yourself and the checker confirms, cell by cell.

• Convert five shipment quantities with chains of conversion factors, supply a missing factor yourself and turn a price per tonne into a price per bottle by letting the units cancel.
• Convert seven quantities with Excel's CONVERT function, compare them with the rules of thumb people use, measure how far off those are and repair a unit code that breaks CONVERT.
• Square and cube length factors to convert warehouse areas and container volumes, convert a metric room to square feet for an imperial tile price and calculate a carton's volume in cubic metres.
• Convert vehicle speeds between km/h, m/s and mph, turn fuel consumption in L/100 km into miles per gallon with the inverse formula and discover the "mpg illusion" in two upgrade options.
• Convert US oven temperatures to Celsius and round them to an oven dial, convert cold-chain set points to Fahrenheit and Kelvin, and convert a temperature change correctly, without the offset.
• Bring six coffee offers in ounces, pounds, grams and kilograms, priced in dollars and euros, to one basis, USD per kg, find the cheapest one and print its shelf price per 100 g.
• Round values to n significant figures with ROUND and LOG10, report a measured density with the right precision, show what rounding in the middle of a chain costs and round up to whole cans.
• Split crate heights in centimetres into feet and inches, turn trip legs in minutes into hours and minutes with INT and MOD, convert them to decimal hours and chart the trip.