Supply Chain Tools

Safety Stock & Reorder Point CalculatorEstimate safety stock and reorder point from daily demand variability, lead time and target service level.
Enter your values and calculate the result.
Formulas used
Safety stock ≈ Z × σLT
σLT = σdaily × √(lead time)
ROP ≈ average daily demand × lead time + safety stock
Bullwhip Effect AnalyzerCompare incoming customer demand with outgoing replenishment orders to detect variability amplification.
Input format
Period; customer demand; replenishment order
Example: Week 1; 120; 140
Paste your time series and calculate the result.
Calculation logic
Sample variance is used for demand and orders.
Bullwhip ratio = variance of orders / variance of demand

Ratio > 1.00 → amplification present
Ratio ≈ 1.00 → similar variability
Ratio < 1.00 → orders are smoother than demand
EOQ CalculatorCalculate economic order quantity and estimate annual ordering, holding and optional purchase cost.
Enter your values and calculate the result.
Formulas used
EOQ = √(2DS / H)
Orders per year = D / EOQ
Annual ordering cost = (D / EOQ) × S
Annual holding cost = (EOQ / 2) × H
Pallet / Container Fill CalculatorEstimate carton capacity from load-space dimensions, stacking height and the better of two layer orientations.
Enter your values and calculate the result.
Calculation logic
Two layer orientations are checked: carton length aligned with load-space length, and carton width aligned with load-space length.
The better layer result is multiplied by the number of full layers fitting within the usable height.
Landed Cost CalculatorEstimate total and per-unit landed cost including freight, insurance, duties, import fees and inland transport.
Enter your values and calculate the result.
Calculation logic
Goods value = unit cost × quantity
Customs value ≈ goods value + international freight + insurance
Duty amount = customs value × duty rate
Total landed cost = goods value + freight + insurance + duty + fees + inland freight