--- title: "Gas Money Calculator: Split Gas Cost | TakeControl" description: "Gas money calculator for road trips: enter miles, MPG and gas price, add tolls and parking, and see how much gas money each person owes the driver. Free." canonical: "https://gettakecontrol.app/en/calculators/gas-split/" language: "en" --- Road trip gas calculator # Gas money calculator: split gas cost for a road trip Enter the distance, your car’s MPG and the price per gallon to see what the trip costs and how much gas money each person should chip in. Tolls, parking and wear and tear are optional extras. Calculate now ## Gas money per person Everything runs in your browser. Nothing is sent or stored. ### The route One-way distance. Google Maps or Apple Maps shows it when you plan the route. Distance (one way) E.g. Los Angeles → Las Vegas is about 270 miles.   Round trip ### The car Use highway MPG and the price per gallon where you’ll fill up. Fuel economy Most sedans get 30–38 MPG on the highway; SUVs and pickups often 20–28. Gas price per gallon Regular, premium or diesel: use the pump price. ### Costs and people Tolls, parking and who’s chipping in. Tolls (one way) (optional) Doubled automatically for a round trip. Parking and other costs (optional) Trip total: parking, ferries, car wash. Wear and tear per mile (optional) To pay back whoever lends the car (tires, oil, maintenance). Many groups use $0.10–$0.20 per mile. People in the car Including the driver. The driver chips in too Uncheck if your group agreed the driver rides free. Result ## Road trip cost ## More trip expenses coming up? Log every payment, keep an eye on the budget and see who owes whom in TakeControl, even offline on the road. [Download on the App Store](https://apps.apple.com/us/app/takecontrol-split-expenses/id6790032465) [Get it on Google Play](https://play.google.com/store/apps/details?id=com.takecontrol.app) Free for iOS and Android. ## How the split gas cost calculator works The math is the same you’d do on a napkin. First the calculator works out the **total distance**, doubling your one-way miles for a round trip. Then it divides that by your car’s MPG to get the **gallons used** and multiplies by the price per gallon. Gas cost = (miles ÷ MPG) × price per gallon On top of gas it adds **tolls** (entered one way, doubled for a round trip), **parking and other costs** for the whole trip and, if you want, a per-mile amount for **wear and tear**. The total is split evenly between everyone in the car, or only between the passengers if the driver rides free. Gas money per person = (gas + tolls + extras + wear) ÷ people paying ## Example: a road trip from Los Angeles to Las Vegas Four friends drive from Los Angeles to Las Vegas and back, about **270 miles** each way on I-15. The car gets **30 MPG** on the highway and regular gas costs **$3.40** a gallon. There are no tolls on this route. | Item | Amount | | --- | --- | | Total distance | 540 miles | | Gas used | 18 gallons | | Gas cost | $61.20 | | Each person pays (4 people) | $15.30 | | Each passenger pays if the driver rides free | $20.40 | That works out to roughly **11 cents per mile**. If the group also pays the car owner $0.15 per mile for wear and tear, that adds $81 and brings each share to $35.55. Note that gas prices in California usually run well above the national average, so check the pump price where you’ll actually fill up. ## How to find your MPG and the right gas price Fuel economy is the number that moves the result most. Use **highway MPG**, which is usually better than city driving. Three ways to get it: - **Trip computer:** most newer cars show average MPG on the dash. Handy, though often a little optimistic. - **Tank-to-tank method:** fill up, reset the trip odometer, drive normally, then fill up again. Divide the miles driven by the gallons from the second fill-up. - **EPA rating:** fueleconomy.gov lists city and highway MPG for most models. Good as a starting point if you haven’t driven the car much. For price, use the grade the car actually takes. If the manual only recommends premium rather than requiring it, most people fill up with regular. Gas apps and map apps show current pump prices along the route, and prices can vary a lot between states. ## How much gas money to give: fair rules for the group The calculator does the arithmetic, but a few choices are up to the group. Agree on them before you leave: ### Does the driver chip in? Most groups **split evenly, driver included**, since the driver is on the trip too. Some let the driver ride free as thanks for doing the work behind the wheel. Either is fine. Just settle it before the first gas stop. ### Gas only, or wear and tear too? When someone **lends their own car**, the trip uses up tires, oil changes and some resale value. Many groups add a small per-mile amount for the owner, often 10 to 20 cents. For context, the IRS business mileage rate (70 cents per mile in 2025) is meant to cover the full cost of owning and running a car, including depreciation and insurance, so it works as an upper bound rather than a fair friend rate. ### Detours and people who join partway Add detours everyone enjoys, like a scenic stop, to the total miles. A detour just to pick someone up can be settled separately. If someone rides for only part of the route, the fairest approach is to **split by leg**: run the numbers for each leg and divide each one only among the people in the car for that stretch. ## Tolls, parking and other road trip costs Many routes on the East Coast and in states like Florida, Texas and Illinois have **tolls**, and some are now cashless. If your car has a transponder such as E-ZPass or SunPass, your account statement makes it easy to check the total afterward. Enter the one-way amount; the calculator doubles it for a round trip. - **Parking** at hotels, stadiums or national parks. - **Ferries** and bridge fees. - **Car wash** after a dusty trip, if the group agrees. Put these in the parking and other costs field as a trip total. Speeding and parking tickets usually stay with whoever was driving. ## Beyond gas: split the whole road trip Gas is only one part of a road trip. Motels, groceries, meals and tickets pile up along the way, and different people pay for different things. By the end, the question is always the same: who owes whom? [TakeControl](https://gettakecontrol.app/en/download/) tracks every trip expense on your phone, from gas and tolls to lodging and food. It works **offline**, which helps on long stretches with no signal, and handles multiple currencies if you cross into Canada or Mexico. At the end it shows **who owes whom** in the fewest payments. For the restaurant check at a stop, try the [bill split calculator](https://gettakecontrol.app/en/calculators/split-bill/). Want a step-by-step plan for the whole trip? Read our guide on [how to split road trip expenses](https://gettakecontrol.app/en/blog/split-road-trip-expenses/). ## Frequently asked questions How do I calculate gas money for a road trip? Divide the total miles by your car’s MPG to get the gallons you’ll use, then multiply by the price per gallon. For example, a 540-mile round trip from Los Angeles to Las Vegas in a car that gets 30 MPG uses 18 gallons. At $3.40 a gallon, that’s $61.20, or $15.30 each for four people. Add tolls and parking for the full trip cost. How much gas money should I give the driver? A fair starting point is your equal share of gas, tolls and parking. If the group agreed the driver rides free, divide the total by the number of passengers instead. If you’re borrowing someone’s car for a long trip, consider adding a few cents per mile for wear and tear on top of gas. Should the driver pay for gas too? It’s up to the group. On a trip with friends, most people split evenly with the driver included, since everyone is going on the same vacation. Some groups let the driver ride free as thanks for driving. The important thing is to agree before the trip, not at the pump. Should we pay for wear and tear on the car? It’s a nice gesture when someone lends their own car for a long trip, since tires, oil changes and maintenance add up. Many groups add 10 to 20 cents per mile. The IRS business mileage rate, 70 cents per mile in 2025, covers the full cost of owning a car including depreciation and insurance, so treat it as an upper bound rather than a typical friend rate. How do I find my car’s MPG? Check the trip computer on your dashboard, look up the EPA highway rating on fueleconomy.gov, or use the tank-to-tank method: fill up, reset the trip odometer, drive, then fill up again and divide the miles driven by the gallons added. Use highway MPG for road trips, since it’s usually better than city driving. How do we split gas when someone only rides part of the way? Split by leg. Calculate the cost of each stretch of the route and divide each one only among the people who were in the car for that stretch. An expense-splitting app like TakeControl makes this easier by letting you log each leg with the right people and showing who owes whom at the end. ## Structured data ```json [ { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Calculators", "item": "https://gettakecontrol.app/en/calculators/" }, { "@type": "ListItem", "position": 2, "name": "Gas money calculator", "item": "https://gettakecontrol.app/en/calculators/gas-split/" } ] }, { "@context": "https://schema.org", "@type": "WebApplication", "name": "Gas Money Calculator", "url": "https://gettakecontrol.app/en/calculators/gas-split/", "applicationCategory": "FinanceApplication", "operatingSystem": "Web", "inLanguage": "en-US", "offers": { "@type": "Offer", "price": "0", "priceCurrency": "USD" }, "publisher": { "@type": "Organization", "name": "TakeControl", "url": "https://gettakecontrol.app/" } }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How do I calculate gas money for a road trip?", "acceptedAnswer": { "@type": "Answer", "text": "Divide the total miles by your car’s MPG to get the gallons you’ll use, then multiply by the price per gallon. For example, a 540-mile round trip from Los Angeles to Las Vegas in a car that gets 30 MPG uses 18 gallons. At $3.40 a gallon, that’s $61.20, or $15.30 each for four people. Add tolls and parking for the full trip cost." } }, { "@type": "Question", "name": "How much gas money should I give the driver?", "acceptedAnswer": { "@type": "Answer", "text": "A fair starting point is your equal share of gas, tolls and parking. If the group agreed the driver rides free, divide the total by the number of passengers instead. If you’re borrowing someone’s car for a long trip, consider adding a few cents per mile for wear and tear on top of gas." } }, { "@type": "Question", "name": "Should the driver pay for gas too?", "acceptedAnswer": { "@type": "Answer", "text": "It’s up to the group. On a trip with friends, most people split evenly with the driver included, since everyone is going on the same vacation. Some groups let the driver ride free as thanks for driving. The important thing is to agree before the trip, not at the pump." } }, { "@type": "Question", "name": "Should we pay for wear and tear on the car?", "acceptedAnswer": { "@type": "Answer", "text": "It’s a nice gesture when someone lends their own car for a long trip, since tires, oil changes and maintenance add up. Many groups add 10 to 20 cents per mile. The IRS business mileage rate, 70 cents per mile in 2025, covers the full cost of owning a car including depreciation and insurance, so treat it as an upper bound rather than a typical friend rate." } }, { "@type": "Question", "name": "How do I find my car’s MPG?", "acceptedAnswer": { "@type": "Answer", "text": "Check the trip computer on your dashboard, look up the EPA highway rating on fueleconomy.gov, or use the tank-to-tank method: fill up, reset the trip odometer, drive, then fill up again and divide the miles driven by the gallons added. Use highway MPG for road trips, since it’s usually better than city driving." } }, { "@type": "Question", "name": "How do we split gas when someone only rides part of the way?", "acceptedAnswer": { "@type": "Answer", "text": "Split by leg. Calculate the cost of each stretch of the route and divide each one only among the people who were in the car for that stretch. An expense-splitting app like TakeControl makes this easier by letting you log each leg with the right people and showing who owes whom at the end." } } ] } ] ```