# mmol/L to mg/dl Conversion

**URL:** <https://forum.fudiabetes.org/t/mmol-l-to-mg-dl-conversion/2911>\
**Category:** Share\
**Tags:** mmol, mgdl, conversion\
**Created:** [December 19, 2017, 10:16pm UTC](https://forum.fudiabetes.org/t/mmol-l-to-mg-dl-conversion/2911 "2017-12-19T22:16:08Z")\
**Posts on this page:** 2\
**Page:** 6

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**Author:** ![Manosphou](https://avatars.discourse-cdn.com/v4/letter/m/c67d28/32.png) [@Manosphou](https://forum.fudiabetes.org/u/Manosphou)\
**Post date:** [June 30, 2026, 6:01am UTC](https://forum.fudiabetes.org/t/mmol-l-to-mg-dl-conversion/2911/102 "2026-06-30T06:01:49Z")

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I’m the opposite. I use mmol/L and get confused by mg/dL. This works both ways. Thanks for sharing.

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**Author:** ![James.J.Igoe](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/james.j.igoe/32/12517_2.png) [@James.J.Igoe](https://forum.fudiabetes.org/u/James.J.Igoe)\
**Post date:** [September 28, 2026, 12:52pm UTC](https://forum.fudiabetes.org/t/mmol-l-to-mg-dl-conversion/2911/103 "2026-09-28T12:52:54Z")

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@Sam To your point, I tend to simplify these types of equations, similar to the Fahrenheit/Celsius conversion. When in Europe, instead of doing the math (**°F = (°C × 9/5) + 32** or **°F = (°C × 1.8) + 32**) I simply add/subtract 32 and then multiple/divide by 2. For me, it’s close enough. Similarly, the mmol calculation is simpler, but I woulld round the multiplier to 20, instead of using 18. If I required accuracy I would do it correctly, but most of the time, dealing in generalities is fine, and @Strat1117 / @jbowler solution is better, but I’d need it so infrequently I might not remember to use it.

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