| Calvin Howarth | |
| Birth Name: | Calvin Howarth |
| Birth Date: | 18 June 1976 |
| Birth Place: | Auckland, New Zealand |
| Height: | 186cm (73inches) |
| Weight: | 96kg (212lb) |
| Amatteam1: | Boroughmuir |
| Amatteam2: | Stirling County |
| Years1: | 2001–2002 |
| Years2: | 2002 |
| Years3: | 2002-06 |
| Years4: | 2006-09 |
| Clubs1: | Edinburgh Rugby |
| Clubs2: | →Glasgow Warriors |
| Clubs3: | Glasgow Warriors |
| Clubs4: | Viadana |
| Apps2: | 7 |
| Apps3: | 70 |
| Points2: | 30 |
| Points3: | 350 |
| Province1: | North Harbour |
| Repteam1: | Scotland A |
| Repyears1: | 2002 |
| Repcaps1: | 1 |
| Reppoints1: | 0 |
| Position: | Fly-half |
| Relatives: | Shane Howarth, brother |
| University: | Auckland University |
Calvin Howarth (born 18 June 1976 in Auckland, New Zealand) is a New Zealand born former Scotland 'A' international rugby union player. He plays at Fly-half.
Howarth was selected for Scotland A on the basis of a four-year residency period and played in Scotland's match against Romania[1] in 2002 to confirm his Scottish nationality.[2] His older brother Shane Howarth represented both New Zealand and Wales.
He moved from New Zealand where he played for North Harbour to Scotland. Playing for Boroughmuir from 1998[3] he helped the team rise through the divisions and also won the BT Cellnet Cup in 2001 beating Melrose. He secured a place with professional district side Edinburgh in 2001.[4]
He was loaned to Glasgow Warriors in March 2002 when their fly-half Barry Irving was injured, as cover for their Cook Islands international fly-half Tommy Hayes. This move became permanent for the 2002-03 season.[5]
He stayed at Glasgow Warriors until 2006-07 season when he moved to Italian side Viadana and stayed there until 2009.[6]
Now back in Auckland, New Zealand, Howarth is a real estate consultant.[7]