# 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:** 1\
**Showing post:** 2

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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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