# Fuel<no value>

{{< callout context="caution" title="IMPORTANT!" icon="outline/alert-triangle" >}}

Token Variables - along with the [Gauge API](../../gauge-api/) - have been deprecated in Microsoft Flight Simulator 2024 in favour of the new [Vars API](../../../vars-api/vars-api/) and [Event API](../../../event-api/event-api/), which work with the more extensive and supported [Simulation Variables](../../../../simvars/simulation-variables/) and [Key Events](../../../../key-events/key-events-index/).

{{< /callout >}}

This page lists the available **fuel** [Token Variables](../token-variables/) for use when creating gauges using {{< glossterm >}}wasm{{< /glossterm >}} / C++.


### Fuel Tanks

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| Parameters | Universal Var Member | Description |
|---|---|---|
| <a id="FUEL_TANK_LEFT_AUX_CAPACITY"></a>`FUEL_TANK_LEFT_AUX_CAPACITY` | `n` (FLOAT64) | The maximum capacity of the Left Auxiliary fuel tank, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="FUEL_TANK_LEFT_AUX_LEVEL"></a>`FUEL_TANK_LEFT_AUX_LEVEL` | `n` (FLOAT64) | The fuel left in the Left Auxiliary tank expressed as a value between 0 and 8388608, corresponding to 0 to 100 percent. |
| <a id="FUEL_TANK_CENTER_CAPACITY"></a>`FUEL_TANK_CENTER_CAPACITY` | `n` (FLOAT64) | The maximum capacity of the Center (1) fuel tank, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="FUEL_TANK_CENTER_LEVEL"></a>`FUEL_TANK_CENTER_LEVEL` | `n` (FLOAT64) | The fuel left in the Center (1) tank expressed as a value between 0 and 8388608, corresponding to 0 to 100 percent. |
| <a id="FUEL_TANK_CENTER2_CAPACITY"></a>`FUEL_TANK_CENTER2_CAPACITY` | `n` (FLOAT64) | The maximum capacity of the Center (2) fuel tank, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="FUEL_TANK_CENTER2_LEVEL"></a>`FUEL_TANK_CENTER2_LEVEL` | `n` (FLOAT64) | The fuel left in the Center (2) tank expressed as a value between 0 and 8388608, corresponding to 0 to 100 percent. |
| <a id="FUEL_TANK_LEFT_MAIN_CAPACITY"></a>`FUEL_TANK_LEFT_MAIN_CAPACITY` | `n` (FLOAT64) | The maximum capacity of the Left Main fuel tank, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="FUEL_TANK_LEFT_MAIN_LEVEL"></a>`FUEL_TANK_LEFT_MAIN_LEVEL` | `n` (FLOAT64) | The fuel left in the Left Main tank expressed as a value between 0 and 8388608, corresponding to 0 to 100 percent. |
| <a id="FUEL_TANK_LEFT_TIP_CAPACITY"></a>`FUEL_TANK_LEFT_TIP_CAPACITY` | `n` (FLOAT64) | The maximum capacity of the Left Tip fuel tank, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="FUEL_TANK_LEFT_TIP_LEVEL"></a>`FUEL_TANK_LEFT_TIP_LEVEL` | `n` (FLOAT64) | The fuel left in the Left Tip tank expressed as a value between 0 and 8388608, corresponding to 0 to 100 percent. |
| <a id="FUEL_TANK_RIGHT_AUX_CAPACITY"></a>`FUEL_TANK_RIGHT_AUX_CAPACITY` | `n` (FLOAT64) | The maximum capacity of the Right Auxiliary fuel tank, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="FUEL_TANK_RIGHT_AUX_LEVEL"></a>`FUEL_TANK_RIGHT_AUX_LEVEL` | `n` (FLOAT64) | The fuel left in the Right Auxiliary tank expressed as a value between 0 and 8388608, corresponding to 0 to 100 percent. |
| <a id="FUEL_TANK_RIGHT_MAIN_CAPACITY"></a>`FUEL_TANK_RIGHT_MAIN_CAPACITY` | `n` (FLOAT64) | The maximum capacity of the Right Main fuel tank, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="FUEL_TANK_RIGHT_MAIN_LEVEL"></a>`FUEL_TANK_RIGHT_MAIN_LEVEL` | `n` (FLOAT64) | The fuel left in the Right Main tank expressed as a value between 0 and 8388608, corresponding to 0 to 100 percent. |
| <a id="FUEL_TANK_RIGHT_TIP_CAPACITY"></a>`FUEL_TANK_RIGHT_TIP_CAPACITY` | `n` (FLOAT64) | The maximum capacity of the Right Tip fuel tank, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="FUEL_TANK_RIGHT_TIP_LEVEL"></a>`FUEL_TANK_RIGHT_TIP_LEVEL` | `n` (FLOAT64) | The fuel left in the Right Tip tank expressed as a value between 0 and 8388608, corresponding to 0 to 100 percent. |

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### General Fuel

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| Parameters | Universal Var Member | Description |
|---|---|---|
| <a id="FUEL_DUMP_ACTIVE"></a>`FUEL_DUMP_ACTIVE` | `b` (BOOL) | Whether the fuel dump is active (TRUE, 1) or not (FALSE, 0). |
| <a id="FUEL_PUMP"></a>`FUEL_PUMP` | `b` (BOOL) | Whether the fuel pump is active (TRUE, 1) or not (FALSE, 0). |
| <a id="FUEL_QUANTITY_CENTER"></a>`FUEL_QUANTITY_CENTER`<span></span><a id="FUEL_QUANTITY_CENTER2"></a>`FUEL_QUANTITY_CENTER2`<span></span><a id="FUEL_QUANTITY_CENTER3"></a>`FUEL_QUANTITY_CENTER3` | `n` (FLOAT64) | The quantity of fuel in the Center 1/2/3 tank, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="FUEL_QUANTITY_LEFT"></a>`FUEL_QUANTITY_LEFT` | `n` (FLOAT64) | The quantity of fuel in the Left tank, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="FUEL_QUANTITY_RIGHT"></a>`FUEL_QUANTITY_RIGHT` | `n` (FLOAT64) | The quantity of fuel in the Right tank, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="FUEL_TRANSFERT_PUMP_ON"></a>`FUEL_TRANSFERT_PUMP_ON` | `b` (BOOL) | Whether the transfer pump is active (TRUE, 1) or not (FALSE, 0). |
| <a id="FUEL_WEGHT_PER_GALLON"></a>`FUEL_WEGHT_PER_GALLON` | `n` (FLOAT64) | Specifies weight of fuel, in pounds I.F. (6 lbs/gal = 1536) |
| <a id="SELECTED_FUEL_QUANTITY_GALLONS"></a>`SELECTED_FUEL_QUANTITY_GALLONS` | `n` (FLOAT64) | The fuel quantity for the selected tank, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="SELECTED_FUEL_QUANTITY_LITERS"></a>`SELECTED_FUEL_QUANTITY_LITERS` | `n` (FLOAT64) | The fuel quantity for the selected tank, in Liters. |
| <a id="SELECTED_FUEL_QUANTITY_PERCENT"></a>`SELECTED_FUEL_QUANTITY_PERCENT` | `n` (FLOAT64) | The quantity of fuel in the tank expressed as a {{< glossterm >}}percent_over_100{{< /glossterm >}}. |
| <a id="SELECTED_FUEL_TRANSFER_MODE"></a>`SELECTED_FUEL_TRANSFER_MODE` | `e` (ENUM)<span></span>{{< params/smallfont-list >}}-1 = off<span></span>0 = auto<span></span>1 = forward<span></span>2 = aft{{< /params/smallfont-list >}} | The transfer mode for the selected fuel tank. |
| <a id="TOTAL_FUEL_QUANTITY_GALLONS"></a>`TOTAL_FUEL_QUANTITY_GALLONS` | `n` (FLOAT64) | The total fuel quantity available from all tanks, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="TOTAL_FUEL_QUANTITY_LBS"></a>`TOTAL_FUEL_QUANTITY_LBS` | `n` (FLOAT64) | The total fuel quantity available from all tanks, in {{< glossterm >}}lbs{{< /glossterm >}}. |
| <a id="TOTAL_UNUSABLE_FUEL_QUANTITY_GALLONS"></a>`TOTAL_UNUSABLE_FUEL_QUANTITY_GALLONS` | `n` (FLOAT64) | The total fuel quantity that will not be useable from all tanks, in {{< glossterm >}}gallons{{< /glossterm >}}. |

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### Fuel System

The following fuel system token variables all require that the aircraft is using the [Fuel System](../../../../content-configuration/cfg-files/flight-model/modular-fuel-system-information/) parameters, not the legacy [\[FUEL\]](../../../../content-configuration/cfg-files/flight_model.cfg/#FUEL) parameters.

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| Parameters | Universal Var Member | Description |
|---|---|---|
| <a id="FUELSYSTEM_ENGINE_PRESSURE"></a>`FUELSYSTEM_ENGINE_PRESSURE` | `n` (FLOAT64) | The pressure of the fuel coming to the engine, in kilopascal. |
| <a id="FUELSYSTEM_JUNCTION_SETTING"></a>`FUELSYSTEM_JUNCTION_SETTING` | `n` (FLOAT64) | The fuel system junction setting. |
| <a id="FUELSYSTEM_LINE_FUEL_FLOW"></a>`FUELSYSTEM_LINE_FUEL_FLOW` | `n` (FLOAT64) | The fuel flowing through the line, in {{< glossterm >}}gallons{{< /glossterm >}} per hour. |
| <a id="FUELSYSTEM_LINE_FUEL_LEVEL"></a>`FUELSYSTEM_LINE_FUEL_LEVEL` | `n` (FLOAT64) | The level of fuel in the line, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="FUELSYSTEM_LINE_FUEL_PRESSURE"></a>`FUELSYSTEM_LINE_FUEL_PRESSURE` | `n` (FLOAT64) | The fuel pressure in the line, in kilopascals. |
| <a id="FUELSYSTEM_PUMP_ACTIVE"></a>`FUELSYSTEM_PUMP_ACTIVE` | `b` (BOOL) | Whether the fuel system pump is active (TRUE, 1) or not (FALSE, 0). |
| <a id="FUELSYSTEM_PUMP_SWITCH"></a>`FUELSYSTEM_PUMP_SWITCH` | `b` (BOOL) | Whether the fuel system pump is enabled (TRUE, 1) or not (FALSE, 0). |
| <a id="FUELSYSTEM_TANK_CAPACITY"></a>`FUELSYSTEM_TANK_CAPACITY` | `n` (FLOAT64) | The total capacity of the tank, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="FUELSYSTEM_TANK_LEVEL"></a>`FUELSYSTEM_TANK_LEVEL` | `n` (FLOAT64) | The quantity of fuel available for use in the tank, expressed as a {{< glossterm >}}percent_over_100{{< /glossterm >}}. |
| <a id="FUELSYSTEM_TANK_QUANTITY"></a>`FUELSYSTEM_TANK_QUANTITY` | `n` (FLOAT64) | The quantity of fuel available for use in the tank, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="FUELSYSTEM_TANK_TOTAL_QUANTITY"></a>`FUELSYSTEM_TANK_TOTAL_QUANTITY` | `n` (FLOAT64) | The total quantity of fuel in the tank, including any that can't be used, in {{< glossterm >}}gallons{{< /glossterm >}}. |
| <a id="FUELSYSTEM_TANK_WEIGHT"></a>`FUELSYSTEM_TANK_WEIGHT` | `n` (FLOAT64) | The weight of fuel in the fuel tank, in {{< glossterm >}}lbs{{< /glossterm >}}. |
| <a id="FUELSYSTEM_TRIGGER_STATUS"></a>`FUELSYSTEM_TRIGGER_STATUS` | `b` (BOOL) | Whether a trigger is active (TRUE, 1) or not (FALSE, 0). |
| <a id="FUELSYSTEM_VALVE_OPEN"></a>`FUELSYSTEM_VALVE_OPEN` | `b` (BOOL) | Whether the valve is open (TRUE, 1) or not (FALSE, 0). |
| <a id="FUELSYSTEM_VALVE_SWITCH"></a>`FUELSYSTEM_VALVE_SWITCH` | `n` (FLOAT64) | Whether the valve is set to be opened (TRUE, 1) or not (FALSE, 0). |

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### Engine Fuel Systems

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| Parameters | Universal Var Member | Description |
|---|---|---|
| <a id="ENGINE_1_FUELFLOW_BUG_POSITION"></a>`ENGINE_1_FUELFLOW_BUG_POSITION`<span></span><a id="ENGINE_2_FUELFLOW_BUG_POSITION"></a>`ENGINE_2_FUELFLOW_BUG_POSITION`<span></span><a id="ENGINE_3_FUELFLOW_BUG_POSITION"></a>`ENGINE_3_FUELFLOW_BUG_POSITION`<span></span><a id="ENGINE_4_FUELFLOW_BUG_POSITION"></a>`ENGINE_4_FUELFLOW_BUG_POSITION` | `n` (FLOAT64) | The fuelflow bug position in {{< glossterm >}}lbs{{< /glossterm >}} per hour for engine 1/2/3/4. |
| <a id="ENGINE1_FUEL_PUMP_ON"></a>`ENGINE1_FUEL_PUMP_ON`<span></span><a id="ENGINE2_FUEL_PUMP_ON"></a>`ENGINE2_FUEL_PUMP_ON`<span></span><a id="ENGINE3_FUEL_PUMP_ON"></a>`ENGINE3_FUEL_PUMP_ON`<span></span><a id="ENGINE4_FUEL_PUMP_ON"></a>`ENGINE4_FUEL_PUMP_ON` | `n` (FLOAT64) | Whether the fuel pump for engine 1/2/3/4 is on (TRUE, 1) or off (FALSE, 0). |
| <a id="GENERAL_ENGINE1_FUEL_PRESSURE"></a>`GENERAL_ENGINE1_FUEL_PRESSURE`<span></span><a id="GENERAL_ENGINE2_FUEL_PRESSURE"></a>`GENERAL_ENGINE2_FUEL_PRESSURE`<span></span><a id="GENERAL_ENGINE3_FUEL_PRESSURE"></a>`GENERAL_ENGINE3_FUEL_PRESSURE`<span></span><a id="GENERAL_ENGINE4_FUEL_PRESSURE"></a>`GENERAL_ENGINE4_FUEL_PRESSURE` | `n` (FLOAT64) | The engine 1/2/3/4 fuel pressure, in {{< glossterm >}}psf{{< /glossterm >}}. |
| <a id="GENERAL_ENGINE1_FUEL_VALVE"></a>`GENERAL_ENGINE1_FUEL_VALVE`<span></span><a id="GENERAL_ENGINE2_FUEL_VALVE"></a>`GENERAL_ENGINE2_FUEL_VALVE`<span></span><a id="GENERAL_ENGINE3_FUEL_VALVE"></a>`GENERAL_ENGINE3_FUEL_VALVE`<span></span><a id="GENERAL_ENGINE4_FUEL_VALVE"></a>`GENERAL_ENGINE4_FUEL_VALVE` | `n` (FLOAT64) | The fuel valve state for engine 1/2/3/4, either open (TRUE, 1) or closed (FALSE, 0). |

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