The Real Cost of the Open Road

Most people budget only for gas, but lodging and food typically dominate a multi-day trip. Fuel is the one true variable you cannot plan away: distance divided by your car's real economy, times the pump price. For 600 miles at 28 mpg and $3.50/gal, that's about $75 — usually the smallest line on the ledger.

Lodging and Food Dominate

At $120 a night and $45 a day for food, a 3-day, 2-night trip adds $330 on top of fuel. Those are the categories with the most wiggle room: camping, hotel loyalty points, cooking at the Airbnb, and splitting meals can cut the trip total by a third. Track them separately so you can see where the money actually goes.

Per-Person Math

Traveling with a companion nearly halves the per-person cost, because lodging — often the biggest line item — is shared while fuel splits evenly. The calculator reports total, per-person, and per-mile figures, so you can compare trip options honestly and agree on a fair split before you pack the car.