Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
ton [tʌn] n (BRIT) дли́нная то́нна; (US) (also: short ton) коро́ткая то́нна; (also: metric ton) метри́ческая то́нна; (NAUT) (also: register ton) реги́стровая то́нна
tons of (inf) то́нны +gen
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
tonne [tʌn]
n (BRIT) (metric ton) то́нна * is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.