Carpool & Gas Cost Splitter — Split Fuel Fairly
Carpooling? Road-tripping? Spllito splits gas, mileage, tolls, and parking fairly — with or without the driver included.
Open Free CalculatorThe fairest way is to divide total fuel cost by the number of passengers — with the driver sometimes excluded because they're providing the vehicle and wear. For longer trips, include mileage reimbursement at the IRS rate (67¢/mile in 2024 and similar in 2026). Spllito handles both patterns.
How to Use the Carpool & Gas Cost Splitter
Here's exactly how it works — usually under a minute from open to settled.
Enter trip details
Distance traveled and fuel cost (or MPG + gas price).
Add passengers
Include or exclude the driver — your call.
Add extras
Tolls, parking, coffee stops — anything shared.
Get the split
Spllito shows each passenger's share instantly.
Tips for Splitting Fairly
Include wear-and-tear
For long road trips (500+ mi), use the IRS rate ($0.67/mi). For a 10-mile school carpool, gas-only is enough.
Split tolls separately
Cash tolls and EZ-Pass charges are trip-specific — log them as separate expenses.
Excluding the driver is fair
The driver provides the car and absorbs depreciation/insurance — excluding them from gas is a reasonable norm.
Venmo the driver at the end
Single payment beats 3 small weekly transfers. Monthly settle-up is ideal for regular carpools.
Gas-only vs. IRS mileage rate — when to use each
Gas-only (fuel cost ÷ passengers) is fine for short/regular carpools. IRS mileage ($0.67/mi) covers gas + depreciation + maintenance — use it for long road trips (>200 mi) or frequent long commutes.
Frequently Asked Questions
How do you split gas money on a road trip?
Take the total fuel cost (or calculate: miles ÷ MPG × gas price) and divide by the number of passengers. Spllito does the math instantly — include the driver or not, your choice.
Should the driver pay for gas in a carpool?
Typically no — the driver provides the vehicle, wear, and insurance. Passengers split gas and tolls. For long trips, passengers may also cover IRS mileage to compensate the driver fairly.
How much is a fair gas split for a 1-hour drive?
At US averages (~30 MPG, $3.50/gallon, 60 miles), fuel cost is ~$7. Split among 3 passengers = $2.33 each, or $3.50 each with the driver excluded.
What's the IRS mileage rate for 2026?
The IRS mileage rate is typically around $0.67/mile in 2026 (check IRS.gov for the current year's rate). This covers gas, depreciation, maintenance, and insurance.
Can I split carpool costs weekly?
Yes — log trips throughout the week in Spllito and settle up every Friday. Keeps balances low and the bookkeeping light.
How do you split Uber or Lyft between 4 people?
Divide the total fare (including tip and any cancellation fees) by 4. For rideshares, include the driver's tip in the split — it's a shared service cost.
Is Spllito's carpool calculator free?
Yes — free, private, no signup. Works for one-time road trips and daily carpools alike.
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