It takes no time at all and is a better indicator of your overall health than calculating your BMI.
It's one thing suspecting you might need to lose weight , but going about calculating this can be a different matter.
If you want a quick answer - without calculating your BMI - then all you need is a piece of string to tell you whether you're overweight or not.
Not only does the test take no time at all, but it can also flag the potential heath problems related to obesity/being overweight, which include heart disease , stroke and some cancers.
In fact, it's also MORE effective than calculating your BMI.