The average rate for the hryvnia -- currently the worst performing currency in the world -- tumbled to 30.55 before nudging back up slightly to 29.56 by 1500 GMT.
The hryvnia lost some 50 per cent of its value in 2014 as east Ukraine collapsed into conflict following the ouster of pro-Russian president Viktor Yanukovych last February.
The pain has continued with the currency plunging even faster since the start of the year as fierce fighting flared again in the eastern industrial heartland.
"The national bank will use all the measures at its disposal to calm the situation on the market," national bank chief Valeriya Gontareva was quoted as saying by news agency Interfax-Ukraine.
Ukraine's economy shrank 7.5 per cent in 2014, with a further contraction of 5.0 per cent expected this year.
The International Monetary Fund agreed earlier this month on a new bailout for Ukraine worth USD 17.5 billion, with the total the country is set to receive from international donors rising to USD 40 billion over the next four years.