Is this only for Tesla vehicles?
The math works for any EV when you know energy use and electricity price, but the page is written for Tesla charging searches.
Should I include charging losses?
Yes. Charging losses make the wall energy higher than the energy added to the battery, so including them is more conservative.
How do I compare home and public charging?
Run separate scenarios with each electricity rate, or use a weighted average rate if you know the share of miles charged at each price.
Why might the real-world result differ?
Match the result to the task type: shopping tools depend on the same unit and usable quantity, home-project tools depend on field measurements and waste, date/time tools depend on counting rules, and conversion tools depend on the unit system.
Should I round the result?
Round for readability after checking the formula and units. Keep more precision when the result feeds another calculation, and add a task-specific buffer only when shortage, waste, or timing risk matters.
Why might another calculator show a different output?
Different tools may use different rounding, assumptions, default rates, methods, formulas, or input timing. Compare the visible method and inputs before relying on the output.