How do you convert mpg to mpg?

To convert mpg (MPG (US)) to mpg (MPG (UK)), apply the conversion formula: MPG (UK) = MPG (US) × 1.20095. For example, 35 MPG (US) converts to 42.03325 MPG (UK).

What is 35 mpg in mpg?

35 mpg (35 MPG (US)) is equal to 42.03325 mpg (42.03325 MPG (UK)).

Which is larger, 1 miles per gallon (us) (MPG (US)) or 1 miles per gallon (uk) (MPG (UK))?

At an input of 1 MPG (US), the equivalent value is 1.20095 MPG (UK), whereas 1 MPG (UK) equals 0.83267 MPG (US). Because fuel economy scales use offset or reciprocal relationships, always check the specific operating range in the conversion table above.

How do I convert back from mpg (uk) (MPG (UK)) to mpg (us) (MPG (US))?

Use the Swap button in the calculator above to switch MPG (UK) and MPG (US) immediately. For reference, 1 MPG (UK) equals 0.83267 MPG (US).

Are there regional or standard differences when converting MPG (US) and MPG (UK)?

US vs. UK MPG and Inverse Consumption Scales: Miles per gallon (MPG) measures distance traveled per unit of fuel (higher is better), whereas Liters per 100 km (L/100km) measures fuel volume consumed over a fixed distance (lower is better). Because the UK Imperial gallon (4.54609 L) is ~20.1% larger than the US gallon (3.78541 L), US MPG uses the conversion constant 235.215 while UK MPG uses 282.481.

MPG to MPG Converter

Enter the fuel economy in mpg below to convert it to mpg.

MPG (UK) to MPG (US) (MPG (UK) → MPG (US))

Convert MPG (US) to MPG (UK)

Enter a value in mpg (us) (MPG (US)) to convert to mpg (uk) (MPG (UK)).

Value (MPG (US))

From

Result

•

42.0332465mpg (uk)

35 MPG (US) = 42.0332465 MPG (UK)

Result updates automatically

Get Widget

Suggested Conversions

Reference:DOE / EPA (EPA 40 CFR Part 600 Fuel Economy)

[1–3] ↓

Miles per Gallon to Miles per Gallon Conversion Table

Table showing various miles per gallon measurements converted to mpg. Click any preset value or arrow to load it into the converter.

MPG (US) (MPG (US))	MPG (UK) (MPG (UK))
1 MPG (US)	1.2009499 MPG (UK)
2 MPG (US)	2.4018998 MPG (UK)
5 MPG (US)	6.0047495 MPG (UK)
6 MPG (US)	7.2056994 MPG (UK)
7 MPG (US)	8.4066493 MPG (UK)
8 MPG (US)	9.6075992 MPG (UK)
10 MPG (US)	12.009499 MPG (UK)
12 MPG (US)	14.4113988 MPG (UK)
15 MPG (US)	18.0142485 MPG (UK)
20 MPG (US)	24.018998 MPG (UK)

How to Convert MPG to MPG

To convert mpg (MPG (US)) to mpg (MPG (UK)), apply the governing fuel efficiency relationship: MPG (UK) = MPG (US) × 1.20095.

Use this formula to convert between mpg and mpg:

MPG (UK) = MPG (US) × 1.20095

Fuel consumption and distance-per-volume efficiency scales are related by exact international volume and mile/kilometer constants.

For example, here's how to convert 35 MPG (US) to mpg using the formula above:

mpg = 35 × 1.2009499 = 42.03325 = 42.0332465 MPG (UK)

How Many MPG Are in a Miles per Gallon?

There are 1.2009499 mpg in a miles per gallon, which is why we use this value in the formula above.

1 MPG (US) = 1.2009499 MPG (UK)|1 MPG (UK) = 0.8326742 MPG (US)

Our miles per gallon to miles per gallon calculator automatically converts your fuel economy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.

MPG and mpg are both units used to measure fuel economy. Keep reading to learn more about each unit.

What Is a Miles per Gallon?

Miles traveled per US liquid gallon. It serves as a primary reference unit for measuring fuel economy across scientific and practical applications. [1]

The miles per gallon is classified as a US customary unit of fuel economy. MPG can be abbreviated as MPG (US); for example, 1 miles per gallon can be written as 1 MPG (US).

As the primary coherent reference unit for fuel economy in this category, all other fuel economy units are mathematically anchored to the miles per gallon (MPG (US)).

In practice, mpg (MPG (US)) are widely used across standard fuel economy applications within US customary workflows, engineering documentation, and technical data sheets.

Learn more about mpg in our Fuel Economy Converter.

What Is a Miles per Gallon?

Miles traveled per UK Imperial gallon. It serves as a primary reference unit for measuring fuel economy across scientific and practical applications. [2]

The miles per gallon is classified as a US customary and imperial unit of fuel economy. MPG can be abbreviated as MPG (UK); for example, 1 miles per gallon can be written as 1 MPG (UK).

When working with mpg (MPG (UK)) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.

In practice, mpg (MPG (UK)) are widely used across standard fuel economy applications within US customary and imperial workflows, engineering documentation, and technical data sheets.

Learn more about mpg in our Fuel Economy Converter.

When converting fuel economy between mpg (MPG (US)) and mpg (MPG (UK)), keep full floating-point precision (1 MPG (US) = 1.2009499 MPG (UK); 1 MPG (UK) = 0.8326742 MPG (US)) during intermediate calculations and round only the final miles per gallon figure to match your instrument tolerance.

More Miles per Gallon (US) & Miles per Gallon Conversions

Need to calculate in the opposite direction? Use our mpg (uk) to mpg (us) converter (MPG (UK) to MPG (US)) to switch your starting unit immediately. You can also explore related tools such as converting l/100km to mpg (uk), converting mpg (us) to l/100km, or converting mpg (us) to km/l.

Convert from Miles per Gallon (US)

Convert to MPG

Frequently Asked Questions

There are 1.20095 mpg (MPG (UK)) in 1 miles per gallon (MPG (US)). Conversely, 1 miles per gallon (MPG (UK)) is equal to 0.83267 mpg (MPG (US)).

Fuel Economy Converter

Quick Info

Direct Factor: 1 miles per gallon (us) (MPG (US)) equals 1.20095 mpg (uk) (MPG (UK)).
Inverse Factor: 1 miles per gallon (uk) (MPG (UK)) equals 0.83267 mpg (us) (MPG (US)).
Formula: MPG (UK) = MPG (US) × 1.20095.
Standard Note: US vs. UK MPG and Inverse Consumption Scales: Miles per gallon (MPG) measures distance traveled per unit of fuel (higher is better), whereas Liters per 100 km (L/100km) measures fuel volume consumed over a fixed distance (lower is better). Because the UK Imperial gallon (4.54609 L) is ~20.1% larger than the US gallon (3.78541 L), US MPG uses the conversion constant 235.215 while UK MPG uses 282.481.

Units Comparison

Miles per Gallon (US) (MPG (US))

Miles traveled per US liquid gallon.

Miles per Gallon (UK) (MPG (UK))

Miles traveled per UK Imperial gallon.

Kilometers per Liter (km/L)

Kilometers traveled per liter of fuel.

References

[1]DOE / EPA · EPA 40 CFR Part 600 Fuel Economy
Source
[2]NIST SP 811 · NIST SP 811 App. B.9 (Fuel Consumption)
Source
[3]NIST OWM · SI Units — Volume (US vs. Imperial Gallon)
Source

Related Categories

Add This Calculator to Your Site

Free HTML widget · 4 embed formats

Embed the interactive MPG (US) to MPG (UK) converter on your blog, classroom, or documentation page.

Customize & Get Embed Code

References

NIST · BIPM · ISO

[1]
DOE / EPA (EPA 40 CFR Part 600 Fuel Economy)·Fuel Economy Metrology Standard — MPG (US) (MPG (US)) to MPG (UK) (MPG (UK))
DOE / EPA Standard
[2]
NIST SP 811 (NIST SP 811 App. B.9 (Fuel Consumption))·Unit Specifications: Miles per Gallon (US) (MPG (US)) & Miles per Gallon (UK) (MPG (UK))
NIST SP 811 Specification
[3]
NIST OWM (SI Units — Volume (US vs. Imperial Gallon))·Conversion Factors & Mathematical Basis (MPG (US) to MPG (UK))
NIST OWM Reference

Measurement Navigator78 Categories9 Scientific Domains

Browse All 78 Measurement Categories

A–Z Directory →Sitemap

Common ConvertersEveryday metric, imperial, and US customary converters for length, weight, volume, temperature, area, pressure, energy, speed, time, and data.