Claimed vs real-world mileage: how to read a kmpl figure
ARAI mileage figures rarely match the road. Learn why the gap exists, what widens or narrows it, and how to measure your own bike's real kmpl.
By Rajat Das, founder and editor
Updated
In short
The kmpl figure on a brochure comes from a lab test, not your commute. Expect real-world mileage to run roughly 15-25% below the claimed number once you account for traffic, load and riding style. The gap is predictable enough that you can budget for it, and measuring your own bike's actual mileage takes only one full tank.
Where the claimed figure comes from
Claimed mileage in India comes from ARAI (Automotive Research Association of India) testing under a standardised lab cycle — fixed speeds, no pillion, controlled temperature, and none of the stop-start, potholes or traffic signals that define actual Indian roads. It is a useful figure for comparing two bikes against each other on a level playing field, but it was never meant to predict what you'll see on your own commute.
The typical real-world gap
As a rough rule of thumb, expect real-world mileage to sit 15-25% below the claimed figure for most commuter bikes and scooters, and the gap can be wider for sports bikes ridden enthusiastically. A bike claiming 60 kmpl might realistically deliver 45-50 kmpl in city traffic with a solo rider and light throttle. This is not a manufacturer flaw — it is the difference between a lab cycle and a real road, and every brand's claimed figures carry roughly the same kind of gap.
What widens or narrows the gap
Several everyday factors move your real mileage up or down:
- Pillion and load: carrying a passenger or a full pannier can shave several kmpl off, especially on smaller-cc engines working harder to maintain speed.
- Tyre pressure: under-inflated tyres increase rolling resistance and are one of the easiest, most ignored mileage killers. Check pressure monthly.
- Short trips and cold starts: an engine that never fully warms up (frequent sub-2 km trips) runs richer and less efficiently than one on a steady 20-minute ride.
- Idling in traffic: long signal waits with the engine running burn fuel for zero distance; a bike with auto start-stop or a habit of turning off at long signals recovers some of this.
- Riding mode: bikes with Eco and Power (or Sport) modes can show a meaningful mileage swing between the two — Eco modes soften throttle response specifically to stretch the tank.
- Riding style: hard acceleration and high cruising rpm cost more than gentle, steady-throttle riding, and this is usually the single biggest lever a rider actually controls.
How to measure your own real mileage
The most reliable method is tankful-to-tankful:
- Fill the tank completely and reset the trip meter to zero.
- Ride normally until the tank is nearly empty.
- Fill it completely again, noting exactly how many litres went in.
- Divide the trip meter distance by litres filled.
Do this over two or three tanks and average it — a single tank can be skewed by one unusually short or long ride. This number, not the brochure figure, is what you should use to budget fuel costs.
Why a 125cc can sometimes beat a 100cc in real use
It sounds backwards, but a 125cc engine working comfortably within its power band can occasionally match or beat a smaller 100cc engine that's constantly being revved hard to keep up with traffic, especially with a pillion or on inclines. Claimed mileage figures favour the smaller engine on paper, but real-world mileage rewards an engine that isn't strained. This is one reason it's worth test-riding a size up before assuming "smaller engine, better mileage" always holds.
Monthly fuel cost: a worked example
Say your commute is 30 km/day, and petrol costs roughly ₹100/litre (a reasonable planning number as of 2026, though prices vary by state and month):
| Real mileage | Litres/day | Cost/day | Cost/month (30 days) |
|---|---|---|---|
| 40 kmpl | 0.75 L | ₹75 | ₹2,250 |
| 50 kmpl | 0.60 L | ₹60 | ₹1,800 |
| 60 kmpl | 0.50 L | ₹50 | ₹1,500 |
A 10 kmpl difference in real-world mileage on a 30 km/day commute works out to roughly ₹450-750 a month — enough to matter over a multi-year ownership period, and worth weighing alongside the bike's upfront price. If you're cross-shopping an electric option, our guide to electric scooter range walks through the equivalent running-cost math per kilometre.
Frequently asked questions
Why doesn't my bike hit the mileage claimed on the brochure?
The claimed figure is from a standardised ARAI lab test with no traffic, no pillion and controlled conditions. Real Indian roads involve stop-start traffic, varying loads and idling, which typically bring real-world mileage down by roughly 15-25% versus the claimed number.
Is there a way to actually improve my real-world mileage?
Yes — keeping tyres at the recommended pressure, avoiding hard acceleration, using Eco mode where available, and reducing unnecessary idling at long signals are the most effective, no-cost changes. Servicing on schedule (air filter, spark plug, chain or CVT belt) also prevents mileage from silently degrading.
Should I trust a dealer's claimed "real-world" mileage figure over ARAI's?
Treat any single number from a dealer with caution — actual mileage varies by rider, load and route, so it is best to measure your own tankful-to-tankful figure after a few weeks of normal use rather than rely on any single quoted number, official or otherwise.
