Automotive Fuel EngineEPA & WLTP CalibratedTrip Distance ⇄ Total Fuel Cost

Fuel Cost Calculator

Direct Answer Summary

To calculate trip fuel cost, divide your total route distance by your vehicle fuel efficiency (MPG), then multiply that required fuel volume by the gas price per gallon. A 300-mile road trip in a 30-MPG vehicle requires 10 gallons of gasoline; at $3.50 per gallon, the total estimated trip expense equals exactly $35.00.

Calculate total fuel costs and gasoline expenses for road trips. Estimate gallons or liters required, cost per mile or km, and total travel budgets.

Trip Distance

Vehicle Fuel Economy

Gas / Fuel Price

Estimated Total Fuel Cost$32.59For 250 miles at 28 mpg_us

Fuel Needed8.93 gal(33.8 Liters)

Cost Per Unit$0.13per mile ($0.081/km)

🌱Estimated Trip Carbon Footprint:~79.3 kg CO₂ emissions

Bookmarkable Calculation:Input values automatically save to the browser URL

The Inverse Relationship

L/100km vs Miles Per Gallon

Because MPG measures distance-per-volume and L/100km measures consumption-over-distance, the formula is inverse: L/100km = 235.215 ÷ US MPG. A smaller L/100km number means better fuel efficiency.

US vs UK Gallons

3.785 L vs 4.546 L Gallons

An Imperial (UK) gallon is 20% larger than a US liquid gallon. Consequently, a car rated at 30 US MPG achieves 36 Imperial UK MPG, though engine efficiency is identical.

Trip Cost Estimation

Fuel Needed × Local Gas Price

To plan your fuel budget: divide route distance by vehicle MPG to get gallons needed, then multiply by local pump price. Aerodynamic highway driving can improve economy by 15–25%.

Fuel Economy•Print-Optimized (A4 & US Letter)

Fuel Cost Calculator & Trip Gas Estimator Reference Table

Verified EPA & WLTP Fuel Economy & Distance Matrix

SizeToolsHub.com

Verified International Size & Measurement Reference Platform

Fuel Cost Calculator & Trip Gas Estimator Reference Table

Fuel Economy Guide

Conversion Reference

Fuel Economy, Distance & Mileage Conversion Charts.

Official mathematical lookup tables between North American MPG, European L/100km, British Imperial MPG, and metric distance.

1. Fuel Economy Equivalence Table (US MPG ⇄ L/100km ⇄ UK MPG ⇄ km/L)

US MPG	Liters / 100km	UK MPG (Imperial)	Kilometers / Liter	Vehicle Efficiency Class
60 MPG	3.92 L/100km	72.06 MPG	25.51 km/L	Plug-in Hybrid / High Efficiency
55 MPG	4.28 L/100km	66.05 MPG	23.38 km/L	Compact Hybrid (e.g. Prius)
50 MPG	4.7 L/100km	60.05 MPG	21.26 km/L	Standard Hybrid Sedan
45 MPG	5.23 L/100km	54.04 MPG	19.13 km/L	Subcompact Diesel / Hybrid SUV
40 MPG	5.88 L/100km	48.04 MPG	17.01 km/L	Efficient Gas Compact
35 MPG	6.72 L/100km	42.03 MPG	14.88 km/L	Standard Compact Car
30 MPG	7.84 L/100km	36.03 MPG	12.75 km/L	Midsize Sedan / Compact Crossover
25 MPG	9.41 L/100km	30.02 MPG	10.63 km/L	Midsize SUV / Small Truck
20 MPG	11.76 L/100km	24.02 MPG	8.5 km/L	Large SUV / Minivan / V6
15 MPG	15.68 L/100km	18.01 MPG	6.38 km/L	Full-Size Truck / V8 Muscle
12 MPG	19.6 L/100km	14.41 MPG	5.1 km/L	Heavy Commercial / Heavy Towing

2. Typical Vehicle Class Fuel Economy & Operating Expense Benchmarks

Vehicle Category	US Fuel Economy	Metric Rating	Estimated Cost / 100 Miles ($3.50/gal)	Classification
Hybrid Electric (e.g. Prius / Ioniq)	52–58 MPG	4.1–4.5 L	$6.25	Ultra Efficient
Compact Sedan (e.g. Civic / Corolla)	32–36 MPG	6.5–7.3 L	$10.29	High Efficiency
Compact Crossover (e.g. RAV4 / CR-V)	28–32 MPG	7.3–8.4 L	$11.67	Average
Midsize 3-Row SUV (e.g. Explorer / Highlander)	21–25 MPG	9.4–11.2 L	$15.22	Average Passenger
Full-Size Truck (e.g. F-150 / Silverado 1500)	17–20 MPG	11.8–13.8 L	$18.92	Low Economy
Performance V8 Sports Car (e.g. Mustang GT)	15–18 MPG	13.1–15.7 L	$21.21	Low Economy

3. Kilometers to Miles Distance Lookup Table

Kilometers (km)	Statute Miles (mi)	Meters (m)	Feet (ft) / Milestone
1 km	0.62 miles	1,000 m	3,281 ft
5 km	3.11 miles	5,000 m	16,404 ft (Standard 5K)
10 km	6.21 miles	10,000 m	32,808 ft (Standard 10K)
21.1 km	13.11 miles	21,097 m	69,219 ft (Half Marathon)
42.2 km	26.22 miles	42,195 m	138,435 ft (Full Marathon)
50 km	31.07 miles	50,000 m	164,042 ft
100 km	62.14 miles	100,000 m	328,084 ft
150 km	93.21 miles	150,000 m	492,126 ft
250 km	155.34 miles	250,000 m	820,210 ft
500 km	310.69 miles	500,000 m	1,640,420 ft
1000 km	621.37 miles	1,000,000 m	3,280,840 ft

Official Reference Chart • https://sizetoolshub.comVerify scale before precision engineering or commercial production.

Fuel & Mileage Questions

Frequently Asked Questions.

Expert answers regarding vehicle fuel consumption, metric conversions, and fuel cost budgeting.

How do you calculate gas cost per mile?↓

Divide the local price per gallon by your car's fuel economy in MPG. For instance, with gasoline at $3.60 per gallon and a car averaging 30 MPG, your running cost is $3.60 ÷ 30 = $0.12 per mile (12 cents/mile).

How does vehicle speed affect highway fuel cost?↓

Aerodynamic drag increases exponentially with speed. Driving at 75 mph consumes roughly 15% to 20% more fuel than driving at 65 mph, adding significant cost to long road trips.

How do you estimate fuel cost for metric routes (in Liters and km)?↓

Multiply the total kilometers driven by your car's L/100km rating, divide by 100 to find total liters consumed, then multiply by the price per liter: (Distance in km ÷ 100) × L/100km × Price per Liter = Total Cost.

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