Shipping Box Volume Calculator (CBM)

Calculate cargo CBM (cubic meters), total cubic feet, and volumetric dimensional weight (divisors 139 & 166) for courier and freight shipments.

Length (L)

Width (W)

Height (H)

Shipment Total CBM

0.079CBM (m³)

Total Cubic Feet (ft³)2.7778 ft³

Total Dimensional Weight (div 139)34.5 lbs lbs

Dimensional Weight in Kilograms15.7 kg kg

Single Box CBM0.0079 m³

3D Geometric Profile

Step 1: Calculate Single Carton CBM (Cubic Meters)0.0079 m³

Formula: CBM = Length (m) × Width (m) × Height (m)

Substitution: 0.254 m × 0.1524 m × 0.2032 m = 0.0079 m³

Ocean freight (LCL) and international freight forwarding rates are charged per cubic meter (CBM).

Step 2: Multiply by Shipment Carton Quantity0.079 m³

Formula: Total CBM = Single CBM × Quantity

Substitution: 0.0079 m³ × 10 boxes = 0.079 m³

Aggregate volume of the entire cargo shipment.

Step 3: Calculate Dimensional / Volumetric Weight (Divisor 139)34.5 lbs (15.7 kg)

Formula: Dim Weight (lbs) = (L × W × H) / Divisor

Substitution: (10 × 6 × 8) / 139 = 34.5 lbs (15.7 kg)

Air couriers (FedEx, UPS, DHL) charge based on the greater of actual scale weight or dimensional weight. Common divisors are 139 (international standard) and 166 (US domestic).

Quick Answer

Calculates total shipment CBM (Length m × Width m × Height m × Quantity) and dimensional weight for air cargo. For example, twenty 20×16×12 inch cartons equal 1.26 CBM (44.4 cubic feet) with 552.5 lbs total dimensional weight at divisor 139.

Shipping Box Volume Calculator (CBM) Formula & Sizing Rules

CBM = Length (m) × Width (m) × Height (m) × Quantity

Mathematical Variable Legend for Shipping Box Volume Calculator (CBM) Formula & Sizing Rules
Variable	Definition	Standard Units
CBM	Cubic Meters of cargo space occupied	m³
Dim Weight	Billable volumetric weight = (L × W × H) / Divisor	lbs or kg

How Dimensional Weight Works in Air Freight

Freight carriers charge based on the greater of actual scale weight or dimensional weight. Lightweight, bulky boxes take up cargo plane hold space; carriers therefore convert volume into a billable weight using standard industry divisors (139 for international couriers, 166 for US domestic).

Common Project Sizing Mistakes

Forgetting that couriers bill the higher of scale weight or dimensional weight
Assuming 1 CBM equals 1 cubic yard (1 CBM = 1.308 cubic yards or 35.315 cubic feet)

Frequently Asked Questions

What is CBM in shipping?▼

CBM stands for Cubic Meter (m³). It is the standard volumetric measurement unit used for ocean freight (LCL) and international cargo shipping.

How do you calculate dimensional weight?▼

Multiply Length × Width × Height in inches, then divide by the carrier’s divisor (typically 139 for international air shipments, 166 for domestic US).

How many CBM fits in a standard shipping container?▼

A standard 20-foot shipping container holds approximately 33 CBM (approx 28–30 CBM usable cargo space). A 40-foot standard container holds approx 67 CBM, and a 40-foot High Cube holds approx 76 CBM.

How do you convert CBM to cubic feet?▼

Multiply CBM by 35.3147. For example, 2 CBM is equal to 2 × 35.3147 = 70.63 cubic feet.

Authoritative Sources & Reference Standards

Guide for the Use of the International System of Units (SI), NIST Special Publication 811 — National Institute of Standards and Technology (NIST). Verified 2026-10-01.
Official SI unit definitions, conversion factors (Appendix B), and precision standards for cubic meters, liters, and US customary units.

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Reviewed by:VolumeCalculator.org Editorial Team·Last updated: 2026-10-01

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