Skip to main content
Toolzum
Back to Calculator

Gas Mileage Calculator

Calculate gas mileage as MPG (miles per gallon) from distance driven and fuel consumed, with a metric L/100km view and trip-cost math. Numbers never leave your device — every calculation runs locally in your browser.

100% Local Browser Native

How to Use the Gas Mileage Calculator

1. Fill the inputs

Enter distance and fuel used.

2. Read the mileage

Check the mileage with cost per distance.

3. Compare scenarios

Duplicate the run with one input changed — the gap between outputs decides it.

Similar Tools You Might Need

See all

Time Duration Calculator

Calculate the exact duration between two times. Handles overnight time spans and displays results in hours, minutes, and seconds. Numbers never leave your device — every calculation runs locally in your browser.

Open Tool

Percentage Difference Calculator

Calculate the percentage difference between any two numbers. Useful for comparing data sets, prices, and measurements. Numbers never leave your device — every calculation runs locally in your browser.

Open Tool

Permutation Calculator

Calculate the number of ways to arrange k items from n items (nPr). Shows the step-by-step permutation calculation. Numbers never leave your device — every calculation runs locally in your browser.

Open Tool

Seat License Calculator

Calculate total cost of software licenses by seats, price per seat, and billing cycle with annual discount. Budget and plan your SaaS subscription costs. Numbers never leave your device — every calculation runs locally in your browser.

Open Tool

MRR Calculator

Calculate Monthly Recurring Revenue from customer count and average revenue per account (ARPA), with monthly, annual, and ARPU readouts. Example: 120 customers at $49 ARPA = $5,880 MRR. Numbers never leave your device — every calculation runs locally in your browser.

Open Tool

Frequently Asked Questions

MPG or L/100km?

Two views via the Unit switch: US (miles, gallons, MPG) and metric (km, liters, L/100km). No UK imperial-gallon view — convert imperial gallons to US gallons (×1.2) by hand first.

Trip cost too?

Add fuel price for total trip cost plus per-mile (US) or per-km (metric) cost.

Why do figures differ?

Driving style, load, and conditions swing real mileage widely.

Is my mileage input uploaded anywhere?

No — calculation runs locally in your browser, free with no signup.

What does the default fill-up cost?

300 miles on 10 gallons at $3.50 gives 30.0 mpg, $35.00 of fuel, $0.117 per mile. Flip to Metric and the same inputs read as 37.9 litres over 482.8 km = 7.8 L/100km (3.78541 L/gal, 1.60934 km/mi).

Related Calculator Tools

Percentage Calculator

Computes X% of Y and what-percent-of-what (X is what % of Y) in two side-by-side panels with precise decimal arithmetic. Essential for everyday math — tips, discounts, tax rates, grade scores, and statistical comparisons where quick percentage answers are needed.

Last updated October 2026