Post-harvest losses accumulate across the entire chain from field to market — harvesting damage, poor transport conditions, inadequate storage, and packaging quality each contribute separately. This calculator estimates your total expected loss percentage and value by scoring each stage of the chain rather than relying on a single flat loss estimate.
Each stage — harvesting method, transport conditions, storage conditions, packaging quality, and time to market — contributes an incremental loss percentage. These compound across the chain: a commodity with rough handling at harvest that also faces poor transport and long time-to-market accumulates losses at each stage rather than experiencing just one.
| Stage | Typical Loss Range |
|---|---|
| Harvesting | 2-8% |
| Transport | 3-10% |
| Storage | 3-15% |
| Packaging & handling | 2-8% |
For 5,000 kg of tomatoes harvested by hand (moderate care), transported in open trucks over 4 hours (fair conditions), stored briefly (2 days) before sale, with basic crate packaging: combined losses across all four stages might total 15-20%, meaning 750-1,000 kg is lost before reaching the final buyer. At a market price of PKR 60/kg, that's a loss value of roughly PKR 45,000-60,000 — often exceeding what basic improvements like better crates or faster transport would have cost.
For perishable produce like fruits and vegetables, storage and transport conditions typically cause the largest losses, since these commodities are highly sensitive to temperature, humidity, and physical damage over time — grains and pulses are far more resilient at these same stages.
Switching from loose stacking or damaged sacks to proper ventilated crates or standardized packaging can reduce handling and transport losses by 30-50% for produce like tomatoes and leafy vegetables, often paying for the packaging cost many times over.
Yes, especially for highly perishable crops — every additional day between harvest and sale for produce like tomatoes or leafy greens can add several percentage points of quality loss, making faster market access one of the most effective loss-reduction strategies available.
This calculator covers losses across the entire chain from harvest to market including transport and handling, while the Storage Loss Calculator focuses specifically on losses during the storage period itself — useful together for a full picture or separately when you need to isolate one stage.