The significant investment programme would provide consistency across the Airline's entire B777-300ERs fleet, with next-generation cabin products that are the new industry benchmark for premium air travel.
Singapore Airlines introduced the new cabin products in September 2013 after taking delivery of the first of eight additional B777-300ERs from Boeing.
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The upgrade programme will see the same products fitted to 19 existing B777-300ERs.
Installation work is expected to begin early in 2015, with all aircraft completed by September 2016.
"Feedback about our next generation cabin products has been extremely positive and our customers have been asking for them to be fitted on more aircraft. We have listened," said Mak Swee Wah, Executive Vice President Commercial.
"This significant investment demonstrates our commitment to constantly enhancing our products and services, and further demonstrates our confidence in the future for premium full-service air travel.