Why is this not a simple multiply?
L/100 km is reciprocal to distance-per-volume metrics, so conversion includes an inversion step.
Fuel Economy
Convert Miles per gallon (US) (mpg (US)) to Liters per 100 kilometers (L/100 km) instantly.
Formula
100 / value (via km/L)
| Sample | Converted |
|---|---|
| 5 mpg (US) | 47.042916659 L/100 km |
| 10 mpg (US) | 23.5214583295 L/100 km |
| 20 mpg (US) | 11.7607291647 L/100 km |
| 35 mpg (US) | 6.7204166656 L/100 km |
| 50 mpg (US) | 4.7042916659 L/100 km |
Use this page to convert mpg (US) to L/100 km when US efficiency source values need consumption-style metric output.
This route converts efficiency-style source values into consumption-style destination values.
Reciprocal behavior means rounding order can materially affect final output.
Use raw source mpg values and avoid transforming rounded display strings.
Retain source and transformed values for audit and support transparency.
Direction-specific pages reduce confusion when mixing reciprocal fuel-economy formats.
mpg (US) to L/100 km is common in cross-market automotive reporting.
Unlike simple linear conversions, this route includes reciprocal logic and unit translation.
A dedicated page helps teams apply the correct sequence consistently.
Explicit direction and variant labeling are key for reliable comparisons.
Implement conversion in one shared module with clear handling of reciprocal math.
Expose destination fields explicitly as L/100 km in APIs and reports.
Retain source mpg_us values for reconciliation and user support.
Test representative efficiency ranges and edge values.
Verify reciprocal conversion sequence in all pipeline stages.
Inspect unit variants and rounding order when outputs differ.
Definition: mpg (US) is the source fuel-economy unit in this direction.
History/Origin: mpg (US) has been a standard consumer and regulatory reference in North American markets.
Current use: Source mpg values are converted to L/100 km for metric consumption reporting and cross-market comparison.
Definition: L/100 km is the destination consumption unit on this page.
History/Origin: L/100 km became a standard consumption-style metric in many automotive markets.
Current use: Converted L/100 km values are used in regional reports, policy analysis, and international product communication.
| Miles per gallon (US) [mpg (US)] | Liters per 100 kilometers [L/100 km] |
|---|---|
| 0.01 mpg (US) | 23,521.4583294756 L/100 km |
| 0.1 mpg (US) | 2,352.1458329476 L/100 km |
| 1 mpg (US) | 235.2145832948 L/100 km |
| 2 mpg (US) | 117.6072916474 L/100 km |
| 5 mpg (US) | 47.042916659 L/100 km |
| 10 mpg (US) | 23.5214583295 L/100 km |
| 20 mpg (US) | 11.7607291647 L/100 km |
| 50 mpg (US) | 4.7042916659 L/100 km |
| 100 mpg (US) | 2.3521458329 L/100 km |
1 mpg (US) = 235.2145832948 L/100 km
1 L/100 km = 235.2145833 mpg (US)
Formula: 100 / value (via km/L)
Example: 15 mpg (US) = 15.6809722197 L/100 km
Precision note: Preserve precision through intermediate reciprocal steps and round only in final published outputs.
L/100 km is reciprocal to distance-per-volume metrics, so conversion includes an inversion step.
Yes, by design. Better efficiency corresponds to lower consumption per 100 km.
The inverse is L/100 km to mpg (US).