Liters per 10 km to Gallons per 100 miles (UK)
L/10km
gal/100mi (UK)
Conversion History
| Conversion | Reuse | Delete |
|---|---|---|
| No conversion history to show. | ||
Quick Reference Table (Liters per 10 km to Gallons per 100 miles (UK))
| Liters per 10 km (L/10km) | Gallons per 100 miles (UK) (gal/100mi (UK)) |
|---|---|
| 0.4 | 885.01547489 |
| 0.5 | 708.012379912 |
| 0.6 | 590.010316593333333333451335396652 |
| 0.7 | 505.723128508571428571580288367124 |
| 0.8 | 442.507737445 |
| 1 | 354.006189956 |
| 1.2 | 295.005158296666666666548664603348 |
| 1.5 | 236.004126637333333333451335396652 |
About Liters per 10 km (L/10km)
Liters per 10 kilometers (L/10km) is a mid-scale fuel consumption unit used primarily in Japan and some East Asian markets as a more readable alternative to L/km. A typical Japanese passenger car achieves 0.6–0.8 L/10km, presenting numbers in a familiar single-digit range. The unit appears on Japanese fuel economy test results and in Asian automotive media. It is exactly one-tenth of the L/100km figure: a European rating of 7 L/100km equals 0.7 L/10km. The unit avoids the leading zeros of L/km while remaining more precise than L/100km for shorter reference distances.
A fuel-efficient kei car achieves around 0.4–0.5 L/10km. A standard Japanese family sedan typically rates at 0.7–0.8 L/10km on the JC08 test cycle.
About Gallons per 100 miles (UK) (gal/100mi (UK))
Gallons per 100 miles (imperial) is the British consumption-oriented counterpart to the metric L/100km standard, expressing how many imperial gallons a vehicle burns over 100 miles. It is numerically distinct from its US equivalent because the imperial gallon (4.546 L) is larger than the US gallon (3.785 L), so UK gal/100mi values are roughly 20% lower than US gal/100mi for identical fuel consumption. The unit is used in UK engineering and fleet management contexts where consumption rather than efficiency framing is preferred, and in academic analysis of British vehicle fuel-use data.
A 50 UK mpg car consumes 2 gal/100mi (imperial). A typical British family SUV at 35 UK mpg uses about 2.86 gal/100mi (imperial).
Liters per 10 km – Frequently Asked Questions
Why does Japan use L/10km instead of L/100km like Europe?
Japan traditionally used km/L as its primary fuel economy metric, and L/10km emerged as a convenient consumption-based complement at a scale that keeps numbers in a comfortable single-digit range for Japanese commuting distances. European L/100km values feel oversized for Japan, where average daily drives are shorter.
Why are Japanese highway speed limits lower and how does that affect fuel figures?
Most Japanese expressways cap at 100–120 km/h, well below the 130 km/h common in Europe or the 120+ km/h effective speed on US interstates. Aerodynamic drag rises with the square of speed, so Japan's lower cruising speeds significantly reduce fuel consumption at highway pace. This is one reason Japanese test-cycle numbers look so good — the driving profile genuinely reflects slower, more fuel-friendly conditions.
What is a good L/10km figure for a kei car?
A modern kei car (660cc engine) typically achieves 0.4–0.55 L/10km, equivalent to 4–5.5 L/100km. The Suzuki Alto has historically been one of the best performers, dipping below 0.4 L/10km on the lenient JC08 test cycle.
Is L/10km used on Japanese fuel economy stickers?
Not directly — Japanese window stickers display km/L as the primary metric. However, L/10km appears in some technical publications and comparison tools because it bridges the gap between the Japanese km/L convention and the European L/100km standard.
How does the JC08 test cycle compare to WLTP for L/10km ratings?
JC08 results are typically 10–20% more optimistic than WLTP because JC08 uses lower speeds and gentler acceleration profiles. A car rated 0.5 L/10km on JC08 might realistically achieve 0.6 L/10km on the more demanding WLTP cycle.
Gallons per 100 miles (UK) – Frequently Asked Questions
Why would anyone use imperial gallons per 100 miles?
Fleet managers and logistics companies in the UK sometimes prefer this consumption-based metric because it scales linearly with cost. If fuel costs £5.50 per imperial gallon, a vehicle using 3 gal/100mi costs exactly £16.50 per 100 miles — much easier to budget than working backwards from mpg.
How does UK gal/100mi compare to US gal/100mi for the same car?
UK gal/100mi values are about 17% lower than US gal/100mi because the imperial gallon is larger. A car consuming 4 US gal/100mi uses only about 3.33 UK gal/100mi. Same fuel burned, but fewer of the bigger gallons needed to measure it.
How do UK fleet operators use gal/100mi to set carbon budgets per vehicle?
Burning one imperial gallon of diesel produces about 10.2 kg of CO₂. Multiplying gal/100mi by that emission factor gives a direct kg-CO₂-per-100-miles figure for each vehicle. Fleet managers set thresholds — say 25 kg CO₂/100mi — and flag any vehicle exceeding it for maintenance or driver retraining. The linear relationship makes gal/100mi far better than mpg for carbon accounting, where small absolute savings matter.
What is a good UK gal/100mi for a family car?
A modern family hatchback should achieve around 1.8–2.3 UK gal/100mi (43–56 UK mpg). Anything under 2 gal/100mi is considered very efficient. SUVs typically sit at 2.5–3.5 gal/100mi, and performance cars can exceed 4 gal/100mi.
Is this unit used on any official UK documentation?
Not on consumer-facing documents. UK vehicle registration (V5C) and type-approval certificates show L/100km and CO₂ g/km. Gal/100mi (imperial) lives mainly in fleet management software, academic transport research, and engineering reports where linear consumption comparisons matter more than the traditional mpg framing.