Baggage allowances are set by the airline and fare class, not the destination, so the real answer lives in your booking confirmation, but the industry patterns help you plan.
Excess charges are where budgets die. Paying for extra weight at the airport counter is the most expensive way to do it anywhere; pre-purchasing additional allowance online days before travel costs a fraction of the counter rate. Overweight single bags, above the low thirties in kilograms, are often refused entirely rather than charged, so redistribute across two bags instead.
Practical habits: weigh bags at home with a cheap luggage scale, check the allowance for every segment separately since codeshare and connecting airlines can differ, and remember the return trip when shopping. If moving abroad with real volume, compare an extra prepaid bag against shipping; the extra bag usually wins for anything you need on arrival.