How to use the rental car vs rideshare calculator
- Enter the days of the trip, the rental price per day and the parking per day. Add fuel for the whole trip and any other rental fees, such as taxes, airport fees or insurance, from your quote.
- Enter how many rides you expect to take and the average fare per ride. Open Advanced options to add a tip percent or a one time ride cost.
- Read which option is cheaper and by how much, plus the break-even number of rides and the cost per day of each.
- Change the number of rides to see where the answer flips. Use Copy, Print or CSV to keep the comparison.
Formula
Rental total = days x (daily price + parking) + fuel + other fees
Rideshare total = rides x fare x (1 + tip) + other ride costs
Break-even rides = (rental total - other ride costs) / (fare x (1 + tip))
At the break-even number of rides the two options cost the same. Fewer rides favor rideshare and more rides favor the rental car.
Four days with a rental at 50 dollars a day
A rental car at $50 a day plus $15 a day for parking costs 4 x ($50 + $15) = $260 for four days, with no fuel or other fees. Ten rides at $18 each cost $180. Rideshare is cheaper by $80.
The break-even point is $260 divided by $18, which is 14.44 rides. Up to 14 rides, rideshare costs less. The 15th ride makes the rental cheaper, so a trip with a lot of short hops can favor the car even when parking is expensive.
Costs people forget
Rental quotes often start with a low daily rate and add taxes, airport fees, insurance and fuel. Put every extra into the fee box to compare honestly. If you will return the car full, include the fuel you will burn. For fuel, the fuel cost calculator turns distance and price into a figure you can enter here.
Rides vary by time of day and demand. If your fares will be higher at night or at peak times, use a higher average fare, or run the tool twice. Tips and booking fees go in the advanced box.
Beyond the money
The cheapest option is not always the best one. A rental gives freedom to leave on your own schedule and to reach places with limited rides. Rideshare saves the stress of driving in an unfamiliar place and the hunt for parking. Your time matters too, though the arithmetic only counts what you pay.
For the rest of a trip budget, use the trip budget planner, and to split shared costs among travelers, the trip cost split calculator.
Assumptions and limits
- All prices are amounts you enter, shown as examples until you replace them. Rental quotes and fares change often.
- Rides are charged at one average fare. Surge pricing, waiting time and tolls are only counted if you build them into the fare.
- Parking is charged for every day of the trip. If you will park free some days, lower the daily parking.
- The comparison covers cost only. It does not value time, comfort or convenience.
Frequently asked questions
How many rides make a rental car cheaper?
Divide the rental total by the cost of one ride. If the result is 14.44, up to 14 rides cost less than the rental and the 15th ride tips it the other way.
Does the tool include gas?
Only if you enter it. Type the fuel you expect to buy in the fuel box, or leave it at zero if your quote or plan covers it another way.
What if I need the car for only part of the trip?
Enter only the days you will rent, and count the rides you would take on the other days under rides. The two options then cover the same trip.
Can I include a tip on rides?
Yes. Open Advanced options and enter a tip percent. It is added to the fare on every ride, and the cost of one ride with the tip is shown in the results.