calculate the ppms and match them with an adjusted dose.. Unless they are the same percent-mass across the board? if not adjust proportionally. Apply a little algebra. You aren't american so i bet you can do the math without any help :P A little algebra... or use some free website or app.
Everytime i find one they shut it down, so i'm afraid to post a link here, lol, but there are free apps, think one is called 'hydrobuddy'. Bwaha, the newest one i have bookmarked is no longer active.... but a simple google or duckduckgo search will get you there too. That's the third one that was taken down after sharing on growdiaries for a few months. It's like they make these things then don't want anyone to use them.
https://scienceinhydroponics.com/2016/03/the-first-free-hydroponic-nutrient-calculator-program-o.html?print=print
There we go, it has a windows version and an app version.
Though i don't see it accounting for specific gravity which can make a fairly big differences... for liquid nutes need to multiply by kg/liter of the nutrients. I've never used hydrobuddy, but the image shown on that link doesn't seem to have inputs for specific gravity. Maybe with different choices selected it does?
Tidbit:
EC converted to ppm is garbage. EC is important on its own but if you want to know the concentration of the nutrients or to match a different product's impact on overall formula, you need to calcualte based on gauranteed analysis labels. As you can see on their own schedule they show 2 vastly different conversion values based on EC (500 and 700 scale). 40% difference solely based on the brand of tds pen you use, which is strongly correlated to the region you live in and nothing to do with one being better than the other - flip a coin. It's inaccurate and imprecise.
I have a shared google drive with a nutrient ppm calculator. it won't calcualte doses for you but 95% sure i have specific gravity worked out properly. LOL.
https://drive.google.com/drive/folders/1GvDcurah5FpjZaBuJQSKtsyIP3ZFNNS0
Some other fun stuff in there.. some relevant textbooks, STS recipe / instructions, hi-res leaf symptom chart, vpd table, dli table, dewpoint table et al... it's my backup repository. Oh, even a frenchy bubble hash video because i was worried they'd put it behind a paywall after his death.