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Dimensional Weight

Unit Conversions for International Shipping (cm ↔ inches, kg ↔ lbs)

Shipping Costs
Updated on 11 Feb 2026
4 min read

When you shop globally, store dimensions and weights may be listed in different units. Use this guide to convert centimeters (cm) to inches (in) and kilograms (kg) to pounds (lb) so you can estimate shipping costs, check size limits, and avoid surprises at checkout.


Why unit conversions matter for Boxit4me shipments


Accurate conversions help you:



Quick conversions (most used)


Length: cm → inches


  • 1 cm = 0.3937 in
  • 10 cm ≈ 3.94 in
  • 30 cm ≈ 11.81 in
  • 50 cm ≈ 19.69 in
  • 100 cm ≈ 39.37 in

Weight: kg → lbs


  • 1 kg = 2.2046 lb
  • 2 kg ≈ 4.41 lb
  • 5 kg ≈ 11.02 lb
  • 10 kg ≈ 22.05 lb
  • 20 kg ≈ 44.09 lb

CM to inches conversion


Formula


inches = cm ÷ 2.54


Examples


  • 25 cm ÷ 2.54 = 9.84 in
  • 60 cm ÷ 2.54 = 23.62 in
  • 120 cm ÷ 2.54 = 47.24 in

Handy reference table (cm → in)


Centimeters (cm)Inches (in)
51.97
103.94
155.91
207.87
3011.81
4015.75
5019.69
6023.62

Inches to cm conversion


Formula


cm = inches × 2.54


Examples


  • 10 in × 2.54 = 25.4 cm
  • 24 in × 2.54 = 61.0 cm
  • 36 in × 2.54 = 91.4 cm

KG to lbs conversion


Formula


lbs = kg × 2.2046


Examples


  • 3 kg × 2.2046 = 6.61 lb
  • 7.5 kg × 2.2046 = 16.53 lb
  • 12 kg × 2.2046 = 26.46 lb

Handy reference table (kg → lb)


Kilograms (kg)Pounds (lb)
0.51.10
12.20
24.41
36.61
511.02
7.516.53
1022.05
1533.07

Lbs to kg conversion


Formula


kg = lbs ÷ 2.2046


Examples


  • 10 lb ÷ 2.2046 = 4.54 kg
  • 25 lb ÷ 2.2046 = 11.34 kg
  • 50 lb ÷ 2.2046 = 22.68 kg

Tips to avoid mistakes


  • Round smart: For estimates, round to 2 decimals. For forms, use the level of precision the page requests.
  • Use consistent units: If a store lists dimensions in cm, convert all dimensions (L/W/H) to inches (or vice versa) together.
  • Don’t guess weights: For faster clearance and fewer delays, keep proof of purchase ready (see invoices & proof of purchase).

FAQs


Which units does Boxit4me use?


Boxit4me pages and carriers may display weights and dimensions in different units depending on the route and carrier. If you’re unsure, convert values here and double-check in the shipping calculator.


Why does shipping cost change when I convert units?


The cost itself doesn’t change, only the unit format. Differences usually come from rounding or using inconsistent units (e.g., converting weight but not dimensions).


Do I need to convert units for customs forms?


Often yes, many customs and carrier systems accept both, but accuracy matters. Use this guide and review the customs declaration steps for clean item descriptions.


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