# Fuel Usage from Flow

**URL:** <https://community.ecumaster.com/t/fuel-usage-from-flow/6317>\
**Category:** ADU\
**Created:** [August 12, 2026, 5:15pm UTC](https://community.ecumaster.com/t/fuel-usage-from-flow/6317 "2026-08-12T17:15:52Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ProperTuningOG](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/propertuningog/32/3481_2.png) [@ProperTuningOG](https://community.ecumaster.com/u/ProperTuningOG)\
**Post date:** [August 12, 2026, 5:15pm UTC](https://community.ecumaster.com/t/fuel-usage-from-flow/6317/1 "2026-08-12T17:15:52Z")

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Before I setup a custom math channel, is there a way to use fuel flow to calculate fuel usage that’s already built into the ADU? On the factory Canams we are doing the ecu has flow on the canbus. Generally I’ll convert that to ml/s.

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**Author:** ![mfudala\_ECUMASTER](https://avatars.discourse-cdn.com/v4/letter/m/ac91a4/32.png) [@mfudala\_ECUMASTER](https://community.ecumaster.com/u/mfudala_ECUMASTER)\
**Post date:** [August 13, 2026, 7:11am UTC](https://community.ecumaster.com/t/fuel-usage-from-flow/6317/2 "2026-08-13T07:11:58Z")

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Hi,

There is no built-in fuel usage calculation from fuel flow in the ADU, so you have to do it with math channels. But you do not have to start from scratch. This was already covered here:

> [@ADU number function, integrate or add to a previous value](https://community.ecumaster.com/t/adu-number-function-integrate-or-add-to-a-previous-value/3779):
>
> Hi, is there a way to either integrate a channel over time, or to update a value, such that the new value is the old value plus another channel? For example, t = 0.998s and channel 1 = 10 and channel 2 = 3, then at t = 1.000s, make channel 1 = previous value plus channel 2, ie 10 + 3 so channel 1 reports 13.

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<div class="post-metadata">

**Author:** ![ProperTuningOG](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/propertuningog/32/3481_2.png) [@ProperTuningOG](https://community.ecumaster.com/u/ProperTuningOG)\
**Post date:** [August 13, 2026, 1:55pm UTC](https://community.ecumaster.com/t/fuel-usage-from-flow/6317/3 "2026-08-13T13:55:53Z")

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Awesome, thank you. I had searched and missed that.