|Born||7 August 1996|
|Height||1.90 m (6 ft 3 in)|
|Weight||82 kg (181 lb)|
At the Singapore World Cup leg in October 2016, he set a world cup record of 14:15.49 in the 1500 meter freestyle (short course), breaking the previous record by over 12 seconds. He holds several distance freestyle national records.
- "Романчук Михайло" [Romanchuk Mykhailo] (in Ukrainian). Ukrainian Swimming Federation. Retrieved 15 July 2019.
- Neidigh, Lauren (22 October 2016). "Chalmers wins his first 2016 World Cup gold on day 2 in Singapore". Swimswam. Retrieved 15 July 2019.