How CoLoCa Works: A Look Behind the Technology
CoLoCa is a specialized Container Loading Calculator that provides freight forwarders, exporters and logistics professionals with fast, precise statements on volume calculation and container utilization. In this post we explain the basic logic of CoLoCa, how inputs, calculations and visualizations interact, and offer practical tips for everyday logistics.
Overview: Purpose and Benefits
The goal of CoLoCa is to simplify the decision for the right container size and thereby save time and costs. The web app calculates cargo volume and automatically shows the utilization for common standard containers (20ft, 40ft, 45ft, each Standard and High Cube). Important advantages are multilingual support (German & English), the ability to share calculations, and a mobile-optimized interface.
User Interface and Main Functions
The interface is clearly divided into input and results areas. Typical functions:
- Position-based entry of goods (title, quantity, unit of measure, height × width × depth)
- Direct volume entry (m³ or ft³) for already known values
- Real-time calculation without an additional confirm button
- Unlimited items, row-wise deletion with confirmation
- Share feature: save calculation, create unique URL, permanently valid
- Display of utilization in percent, remaining space and color coding
These components enable a fast, error-reduced determination of the required container space and facilitate communication with customers through share links.
Calculation Logic for Volume and Space Usage
CoLoCa relies on simple, comprehensible formulas for volume calculation to provide precise m³ values. For dimension-based inputs the rule is:
Volume (m³) = Height × Width × Depth × Conversion factor × Quantity
Conversion factors to m³ (selection):
- 1 mm³ = 0.000000001 m³
- 1 cm³ = 0.000001 m³
- 1 m³ = 1 m³
- 1 inch³ = 0.000016387064 m³
- 1 ft³ = 0.028316846592 m³
For direct volume entries m³ and ft³ are automatically converted bidirectionally (1 m³ = 35.315 ft³).
Container utilization is then calculated as the ratio of total cargo volume to container internal volume and displayed as a percentage. Colored status indicators (Green/Yellow/Red/Black) make it immediately clear whether a container is underutilized, optimally filled, critically full or overloaded.
Supported Container Sizes
CoLoCa works with six standard container types and exact internal dimensions so that the results are practical:
- 45ft Standard — Internal dimensions: 2.34 × 13.55 × 2.36 m — Volume: 74.63 m³
- 45ft High Cube — Internal dimensions: 2.34 × 13.55 × 2.655 m — Volume: 84.16 m³
- 40ft Standard — Internal dimensions: 2.35 × 12.03 × 2.39 m — Volume: 67.69 m³
- 40ft High Cube — Internal dimensions: 2.35 × 12.03 × 2.655 m — Volume: 76.36 m³
- 20ft Standard — Internal dimensions: 2.35 × 5.9 × 2.39 m — Volume: 33.17 m³
- 20ft High Cube — Internal dimensions: 2.35 × 5.9 × 2.655 m — Volume: 37.38 m³
Example: 5 pallets at 120 × 80 × 100 cm → 5 × 0.96 m³ = 4.80 m³. In a 40ft Standard (67.69 m³) that corresponds to a minimum utilization of 7.09%.
Multilingual Support, Sharing and Data Privacy
CoLoCa is available in German and English, and content can be switched with a toggle. The share feature generates unique links permanently valid that fully restore all items and results — ideal for quoting processes and customer communication. Storage is minimal and designed to be privacy-friendly, which simplifies handling sensitive business data in daily operations.
Practical Tips for Better Packing and Loading Planning
- Measure carefully: avoid rounding errors. For pallets measure including packaging and stretch wrap.
- Check stackability: if goods are stackable, volume requirements can be reduced. CoLoCa's volume calculation considers pure space volume; stacking behavior should be checked separately.
- Orientation matters: pay attention to the best orientation (length vs. width) for optimal space utilization.
- Consider weight: volume and weight are both decisive. A container that is optimally utilized by volume may be limited by weight — check weight limits as well.
- Plan a safety buffer: for sensitive cargo, a buffer of 5–10% below maximum volume is recommended to avoid loading errors.
- Plan multiple loads: use the share links to coordinate scenarios with multiple stakeholders.
Practical Examples
- Freight forwarder: Quick response to a customer inquiry — enter volume, send share link, customer confirms container choice.
- Exporter: Multiple packages with different dimensions → enter all items, compare utilization for 20ft/40ft/45ft.
- Warehouse logistics: Determine storage needs by summarizing planned shipment volumes in m³.
Roadmap and Planned Extensions (Outlook)
CoLoCa remains in development with a focus on user benefit. Planned extensions include expanded container profiles, improved visualizations for load distribution and additional export functions for reports. The aim is to cover even more practical cases and further facilitate integration into daily workflows — without compromises on usability and data protection.
Conclusion
CoLoCa combines ease of use with precise volume calculation and meaningful container utilization. The combination of dimension-based calculation, direct volume entry, multilingual interface and shareable results makes the application a pragmatic tool for freight forwarders, exporters and logistics professionals. When used correctly, CoLoCa helps accelerate decisions about container size, reduce transport costs and simplify communication with business partners.