Log one trip
Miles plus battery at the start and finish.
The numbers behind MyEVRange
Here’s how the range is worked out.
A journey gives us distance and battery used. We turn that into a full-battery equivalent, then combine results so one frequent contributor does not dominate the average.
The short version
What happens to each trip
Put it on a 100% scale
A partial battery use becomes a full-battery equivalent.
Group one driver's trips
Several trips from the same person become one driver result.
Then average drivers
A big import does not count as hundreds of separate votes.
First: one trip means one trip
What counts as one journey?
One individual trip from setting off to arriving at your destination. Think of one entry in your car or EV app's trip history.
✓ Use
Home → work, one motorway run, one school run, or one individual trip recorded by your vehicle app.
× Don't use
A whole day or week of unrelated driving combined into one manual entry, or the dashboard's predicted remaining range.
The maths
It’s simply distance ÷ battery used
A 180-mile trip using 60% of the battery becomes 300 miles on a 100% scale.
Distance travelled180 mi
÷
Battery used60 %
=
Journey equivalent300 mi
Why require at least 10% battery use?
Dashboard percentages are usually rounded to whole numbers, so very small battery changes can distort a projected range. Requiring at least 10% battery use reduces that rounding effect. Journeys using more of the battery generally provide a more reliable range estimate.
Avoiding one-person bias
Lots of trips are useful. They still count as one driver’s evidence.
If one person uploads six months of trips, we do not let that outweigh everyone else.
Calculate accepted trips
Each journey gets its own full-battery equivalent.
Combine one driver's trips
That creates a typical result for that contributor.
Combine independent drivers
Driver-level results then create the public owner range.
Technical detail: weighting, outliers and small samples +
Within one driver's data, journeys using more of the battery receive the existing modest reliability weight because percentage rounding matters less over a larger battery change. We do not apply a separate mathematical "trust score" to short trips.
From 10 independent drivers, the highest and lowest 10% of driver-level results are trimmed from the mean to reduce the influence of extremes. Median and spread statistics are retained as well.
Early samples are labelled clearly so a figure based on only a few drivers is not presented with false certainty.
The useful extras
Speed and temperature help answer better questions
They do not change the trip result. They let us compare journeys that happened under similar conditions.
Town / Mixed / Motorway
Separates broad driving environments so town journeys are not lumped together with motorway runs.
Used for: road-type comparisonsWeather + load
Simple categories show whether cold conditions or a heavily loaded car tend to shift the range.
Used for: cold/warm and load comparisonsAverage speed optional
An objective extra signal that can separate a congested motorway trip from a faster one.
Used for: similar-speed journey groupsOutside temperature optional
Gives us exact environmental context instead of relying only on broad cold / average / hot labels.
Used for: temperature-specific results
With enough journeys, we’d like to show:
Overall owner rangeTown vs motorwayCold vs warmDifferent average speedsDriver only vs loadedJourneys similar to yours
Running costs
Turning mi/kWh into something familiar
Where we have accepted driver journeys, EV pages can turn that real-world efficiency into a simple question: what would 100 miles cost depending on where you charge?
Start with submitted journeys
Running costs are only shown when MyEVRange has driver journey data for that EV. We do not use WLTP as a fallback for this calculation.
Real-world efficiency firstChoose where you charge
Compare the Ofgem price cap, an 8p EV tariff, HMRC's public-charging figure or an 80p rapid-charging rate.
Same driver efficiency, different electricity pricesCompare with UK pump prices
The latest DESNZ average petrol and diesel prices are converted to a cost per UK gallon, then compared with the EV's pence per mile.
Fuel data is normally updated weeklyEquivalent MPG means equivalent cost
If we say an EV costs the same per mile as a 100 mpg diesel, we are comparing money spent per mile — not claiming the EV literally has an MPG efficiency.
Cost comparison onlyCharging prices vary.
We keep the driver efficiency the same and change only the electricity price, so you can compare different ways of charging.
Basic checks
A few rules keep bad data out
At least 10% battery useReduces the effect of rounded battery percentages; journeys using more battery generally provide a more reliable estimate.
Use actual distanceNot the car's predicted remaining range.
Don't guess optional fieldsBlank is more useful than invented speed, temperature or conditions.
Unusual results are checkedImpossible results are rejected; unusual-but-possible ones can be reviewed before affecting public figures.
Import from an app
Got trip history? Bring it in.
CSV, TSV and Excel files can supply the same journey fields. Where present, average speed, duration and outside temperature can be mapped too.
Got a trip?
Find my EV →Add it now.
No account needed · about 30 seconds.