After much searching I found a couple of good online area calculators, so thought they might be useful to fellow Thai visa members out there. Anyone know of better ones?

http://keisan.casio.com/exec/system/1322718508

http://www.had2know.com/academics/sas-asa-sss-triangle-calculator.html

Thanks for those. I have worked out areas by calculation and by grid method and dividing the area into smaller portions etc and it is so easy to be a little bit out that can result in being a lot out. And if money is involved you don't want to be out.

Thanks for those. I have worked out areas by calculation and by grid method and dividing the area into smaller portions etc and it is so easy to be a little bit out that can result in being a lot out. And if money is involved you don't want to be out.

Thanks for the feedback Xen, yep I've done the same over the years but often thought there must be an easier way...was a bit concerned that some would point out this was so obvious...such is Thai Visa :-)

Expensive, but if this comes up a lot for you there are nice gps units that do a great job with this.