Calculate the difference in access between two dates

i have two fields: TimeFrom and TimeTo
data Type is text.
TimeFrom                   07:15 AM, the format is HH:mm AM
TimeTo                        10:15 AM

(10*60)+15 AM=615
the difference is        180 minutes
TimeFrom                  10:50 AM
TimeTo                        02:30 PM
the difference is        220 minutes
((02+12)*60)+30=870                 ' pm needs to add 12
how to calculate the difference in access query, considering time format, AM or PM in single query

select DateFrom,  DateTo ,Duration from tblTable
Roman FAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Rey Obrero (Capricorn1)Commented:
test this

select DateFrom,  DateTo ,Datediff("n",[DateFrom],[DateTo]) as Duration from tblTable

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Roman FAuthor Commented:
Thanks a lot, much easier :) than i was thinking... Great. Thank you for your help
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Access

From novice to tech pro — start learning today.