Reorder Point Calculator
Enter your average daily sales, supplier lead time, safety stock buffer, and unit cost. See lead time demand, reorder point in units and dollars, days of cover at reorder, and how long your safety buffer lasts at peak sales. Order at the right time, not too early and not too late.
Instant calculations · Editable fee assumptions · Export-ready results
Inputs
Values update results instantly. Adjust fee assumptions to match your seller dashboard.
Demand
Average units sold per day
Peak daily sales for safety stock context
Supply
Days from placing order to receiving stock
Buffer
Buffer stock from safety stock calculator, or enter manually
Reference
Purchase or manufacturing cost per unit
Results
Live estimates based on your inputs and editable fee assumptions.
Lead time demand
70
Units needed to cover supplier lead time.
Safety stock
30
Buffer units held.
Reorder point (units)
100
Order when inventory hits this level.
Reorder point value
$1,250.00
Dollar value tied at reorder point.
Days of cover at reorder
10
Reorder point divided by avg daily sales.
Safety stock coverage at peak
1.67
How many peak days safety stock covers.
What this means
Lead time demand 70 units. Reorder at 100 units = $1250.00 value. 10.0 days cover vs 7-day lead. Safety covers 1.67 days at peak.
Reorder point composition
Interactive breakdown of fees, costs, and remaining profit.
Distribution
- Lead time demand$70.0070.0%
- Safety stock$30.0030.0%
Total $100.00 · 2 segments · interactive
Line-item breakdown
Dollar amounts, share of revenue, and visual proportion.
- Avg daily sales
- 10
- Lead time days
- 7
- Lead time demand
- 70
- Safety stock
- 30
- Reorder point units
- 100
- Reorder point value
- $1,250.00
- Days of cover
- 10
- Peak coverage days
- 1.67
Assumptions used
- • 10/day × 7 days = 70 lead demand
- • + 30 safety = 100 reorder point
- • 100 × $12.50 = $1250.00 tied
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Reorder Point Calculator
Generated 8/4/2026, 2:50:17 PM · Currency USD
Inputs
- Average daily sales (units): 10
- Lead time (days): 7
- Safety stock (units): 30
- Peak daily sales (for context): 18
- Cost per unit: 12.5
Results
- Avg daily sales: 10
- Lead time days: 7
- Lead time demand: 70
- Safety stock: 30
- Reorder point units: 100
- Reorder point value: $1,250.00
- Days of cover: 10
- Peak coverage days: 1.67
Interpretation
Lead time demand 70 units. Reorder at 100 units = $1250.00 value. 10.0 days cover vs 7-day lead. Safety covers 1.67 days at peak.
How it works
Methodology & formulas
This calculator is transparent by design. Review the steps and formulas so you can trust the estimate and adjust assumptions when your dashboard differs.
Calculation steps
- 1Multiply average daily sales by lead time days for demand during lead time.
- 2Add buffer safety stock to get reorder point in units.
- 3Multiply reorder point by unit cost for tied capital value.
- 4Divide reorder point by avg daily sales for days of cover.
- 5Divide safety stock by max daily sales for peak coverage days.
Formulas
- leadTimeDemand = avgDailySales × leadTimeDays
- reorderPoint = leadTimeDemand + safetyStock
- reorderValue = reorderPoint × unitCost
- daysCover = reorderPoint / avgDailySales
- safetyCoverage = safetyStock / maxDailySales
Important assumptions
- Lead time demand = avgDailySales × leadTimeDays.
- Reorder point = lead time demand + safety stock.
- Reorder value = reorder point × unitCost.
- Days of cover = reorderPoint / avgDailySales.
- Safety coverage at peak = safetyStock / maxDailySales if maxDailySales > 0.
Worked example
10 sales/day with 7 day lead time
You sell 10/day average, 18/day peak, lead time 7 days, safety stock 30, cost $12.50. Lead time demand 10×7=70. Reorder point 100 units. Value $1,250. Coverage 10 days total, safety covers 1.67 days at max 18/day.
FAQ
Common questions
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