👉 Mailing math involves calculating the cost of sending a letter or package based on various factors like weight, distance, and service type. The primary components include the base rate for the carrier (e.g., USPS, FedEx), which varies by weight and size; distance-based surcharges for the physical journey from sender to destination; and additional fees for services like priority handling, tracking, or international shipping. For example, a standard letter weighing 5 grams might cost $0.10 via USPS, but this can increase significantly with weight or distance—say, adding 2 pounds and a 1,000-mile international route could push the total to $30 or more. Carriers also apply flat fees for services like signature confirmation or insurance, and international mailing often incurs extra charges due to customs and border controls. Accurate weight measurement (using scales or the carrier’s guidelines) and understanding service class tiers (e.g., standard vs. expedited) are critical to avoid unexpected costs, ensuring mailing expenses align with budget and delivery needs.
