Volume and Weight Calculator for Multiple Carriers | Federico Calò
Calculate volumetric weight (PVC) and taxable weight for BRT, SDA, DHL, GLS and Poste Italiane. Compare divisions and estimated price for each carrier to optimize shipping costs.
The volumetric weight (dimensional weight or PVC) is a conventional weight that carriers apply to light but bulky packages. The formula is: Volumetric Weight (kg) = Length × Width × Height (cm) / Divisor. The divisor varies by carrier: 5000 cm³/kg for BRT, SDA, DHL and Poste Italiane; 4000 cm³/kg for GLS.
The taxable weight</x> (or invoiced weight) is the greatest between the real weight and the volumetric weight: max(Peso Reale, Peso Volumetrico)</x>. If you send a large but light package, the courier charges by volume - you pay for the space occupied in the vehicle, not for the actual weight of the product.
This tool connects to the backend to get updated PVC divisors for 2026 by carrier and calculates volume weight, taxable weight, and indicative price. Compare carriers in seconds - useful for e-commerce, import/export, and business logistics.
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Frequently Asked Questions
What is volumetric weight (PVC)?
Volume weight is a conventional weight calculated based on the package dimensions: Volume Weight = (Length × Width × Height) / Cubic Centimeter Divisor. The standard divisor is 5000 cm³/kg for most carriers (BRT, SDA, DHL, Poste), while GLS uses 4000 cm³/kg. If the package is voluminous but lightweight, the carrier charges volume weight instead of actual weight.
How is taxable weight calculated?
Taxable weight (or invoice weight) is the highest between actual weight and volume weight: Taxable Weight = max(Actual Weight, Volume Weight). The courier applies the tariff to the taxable weight, not the actual package weight. Example: a 40×30×20 cm package weighing 1 kg with a divider of 5000 → volume weight = (40×30×20)/5000 = 4.8 kg → invoice 4.8 kg.
Why do PVC dividers vary among carriers?
The PVC divider depends on each carrier's tariff policy. The IATA standard for air transport is 6000 cm³/kg; for national Italian road carriers the common divider is 5000 cm³/kg. GLS applies 4000 cm³/kg, meaning it charges for bulky packages at a higher weight than other carriers.
Is this the final price of the courier?
No. The indicated price is an estimate based on the base zone 1 published rate ([ASSUMED] - 2026-Q2). Actual price depends on: delivery zone, commercial agreements, additional services (insurance, pickup, etc.), total shipment weight (volume contracts), and carrier tariff revisions. For a precise quote, contact the courier directly or a logistics broker.
How can I reduce volume weight?
Reduce shipping costs by optimizing packaging dimensions: (1) Use adhesive boxes that fit the product, eliminating unnecessary empty space. (2) Use lightweight yet effective fill materials. (3) Compare rates with PVC divider boxes of higher height (5000 vs 4000). (4) Negotiate volume contracts for large volumes with the carrier. (5) Consider flexible packaging (stuffed mailers) for non-fragile items.
When should each courier be used?
Choose the carrier based on weight/volume ratio of package: for heavy and compact packages (real weight > volumetric), carriers charge real weight - choose by price and reliability zone. For light and voluminous packages, PVC divider makes a difference: BRT/SDA/DHL/Poste (5000) apply lower volumetric weight than GLS (4000). Use this tool to compare carriers on the same package before choosing.
How is it used?
- Select a Courier
Choose the carrier (BRT, SDA, DHL, GLS or Poste Italiane). Each carrier applies a different PVC divider for volume weight calculation: the standard divider is 5000 cm³/kg, GLS uses 4000 cm³/kg.
- Insert package dimensions
Measure length, width and height of package in cm. Use external dimensions including packaging. Also enter the actual weight in kg measured on the scale.
- Calculate taxable weight
Click the button: the server calculates volume weight (L x L x H / divisor) and taxable weight (the greater of real and volume weights). The estimated price is based on the taxable weight.
- Interpret the result and compare couriers
If the volumetric weight exceeds the real weight, the courier charges volumetric. Try different couriers to compare the volume-to-weight ratio and estimated price - actual price depends on commercial agreements, delivery zone, and additional services.
Formulas and Divisors
- Peso Volumetrico = L × W × H / Divisore
- Where L, W, and H are length, width, and height in cm; the Divider is the PVC coefficient of the package (cm³/kg); Returns the volume weight in kg.
- Peso Tassabile = max(Peso Reale, Peso Volumetrico)
- The carrier calculates its heaviest weight between real and volumetric weight. For light and bulky packages, the volumetric weight exceeds the real weight.
- PVC Pipe Dividers for 2026-Q2 Mailers
- BRT: 5000 cm³/kg - SDA: 5000 cm³/kg - DHL: 5000 cm³/kg - GLS: 4000 cm³/kg - Poste Italiane: 5000 cm³/kg. [ASSUMED - to be verified against official rate cards]
- Practical example
- Pack 40x30x20 cm, actual weight 1 kg, courier BRT (div. 5000): Volume Weight = 40x30x20/5000 = 4.8 kg → taxable weight = max(1, 4.8) = 4.8 kg → the courier charges 4.8 kg.
Do you need a custom analysis?
This tool is free and informative. For in-depth analysis with AI on-prem - private data, zero cloud - contact Federico.