A quick calculation from this website:
http://www.taxisingapore.com/externa...re-calculator/
Estimated Fare using meter at 23:14
Distance: 25.34 km. | Duration: 31 min.
first km S$2.80
10.0 km. x S$0.52 per km S$5.19
14.34 km. x S$0.61 per km S$8.69
waiting in traffic (~9 min.) S$2.59
Changi Airport & Changi Air Freight Centre S$5.00
Total S$24.28
on a Sunday or Public Holiday it would be S$24.28