Freight Modal Shift Calculator — Mode Comparison & Carbon Savings
Calculate cost and carbon savings from shifting freight between transport modes. Compare truck, rail, ocean, and air — find the optimal mode for cost, speed, and sustainability.
🔄 Freight Modal Shift Calculator
How to Use This Calculator
- Select current and proposed modes — the most impactful shift is air → ocean for long-haul: 70–85% cost reduction.
- Enter monthly shipment weight and distance — to calculate CO₂ saving alongside freight cost saving.
- Factor transit time difference — shifting from air to ocean adds 3–5 weeks — ensure safety stock and demand planning are adjusted.
Worked Example
Air → ocean: 12 tonnes/month, 12,000 km, $4.50/kg air vs $0.65/kg ocean, 2 vs 28 days.
- Air cost/month: 12,000 kg × $4.50 = $54,000
- Ocean cost/month: 12,000 kg × $0.65 = $7,800
- Monthly saving: $46,200
- Annual saving: $554,400
- CO₂ saving: 57.4 tonnes/year
Shifting 10% of air freight to ocean is one of the highest-ROI supply chain moves available. The trade-off is 3–5 extra weeks in transit — manageable with higher safety stock, which costs far less than the freight saving.
Frequently Asked Questions
Air freight justifies its premium when: time-to-market is critical (new product launches, fashion seasonality), goods are high-value and low-weight (electronics, pharmaceuticals), stockouts carry significant penalty cost, or ocean lead times are too long for the demand cycle. Run the air vs ocean cost comparison vs cost of extra safety stock.
Start with slow-moving, non-seasonal SKUs. Build extra safety stock (calculate using the safety stock calculator). Work with your freight forwarder to consolidate LCL ocean. Run a 3-month pilot before committing. Establish a clear decision framework: air for urgent restocks, ocean for planned replenishment.