The formula is pretty straightforward, the sheet itself is a bit of a mess. Take the price you pay for each car; take your number of miles driven a year; use the mpg and kWh/mi to calculate the operational cost of each for a year (I think I used a conservative value of like 180 kWh/mi for my 3). Then multiply by the number of years owned and add the purchase price.

Let me guess: you are low-balling your Tesla maintenance costs, because you haven't yet had an issue. Well, guess what, when you do, dealing with it will be expensive.

RepairPal says the average annual cost to maintain a Model 3 is twice that of a Honda Civic.

I’m not counting maintenance for either vehicle, though: and, over the expected ownership time, I save enough with electricity for the Tesla to pay for a $16k battery pack replacement (and, over the four years I’ve owned the tesla, I’ve probably spent like $2000 on Tesla maintenance and $6k on maintaining the Odyssey, so I think I’ll save enough on regular maintenance to break even when I have to replace the battery)