How do you get an idea what you weigh at different lattitudes?

how does one get a clear idea of how much one weighs at different latitudes since the gravitational force varies with the latitude reducing from least at the equator to greatest at the poles assuming one uses the same weights.Does one recalibrate the weighing balances or assume one has put on weight?weight lifters should know,since ones body weight counts!!!

When I was a kid, I traveled to Bali, Indonesia a few times with my dad. He was always thrilled when he went, because he weighed less (about 5-10 pounds) immediately after arrival.

So 15 years ago, common scales weren't recalibrated that way, but you might expect at some point for them to be recalibrated - at least for cargo. Weighing people at different spots though...I can't see it happening to calibrate them correctly, simply because there isn't a business incentive I could see for making such equipment.