eBay Seller Tools
eBay Inventory Restock Calculator
Estimate when to reorder eBay inventory based on current stock, recent sales pace, supplier lead time, safety stock, item cost, profit per unit, conversion rate, and restock risk.
Restock inputs
Enter stock, recent sales, review period, supplier lead time, safety stock, target coverage, and per-unit economics to estimate reorder timing and quantity.
Inventory and sales pace
Restock timing
Unit economics
Results
Estimated eBay restock timing and quantity.
Recommended restock
30 units
Target stock units minus current stock
Reorder point
26 units
Lead time demand plus safety stock
Days of stock left
20.0 days
Current stock divided by daily sales pace
Stockout gap
2 units
Units below the estimated reorder point
Daily sales pace
1.20
Units sold divided by review period days
Monthly sales pace
36.0
Estimated units sold every 30 days
Lead time demand
17 units
Estimated units sold during supplier lead time
Safety stock
9 units
Extra inventory coverage based on safety stock days
Target stock level
54 units
Estimated units needed for target stock coverage
Restock cost
$540.00
Recommended restock quantity multiplied by unit cost
Expected restock profit
$400.50
Profit from restock after defect and storage allowance
Restock ROI
74.2%
Expected restock profit divided by restock cost
Cash tied in stock
$432.00
Current stock multiplied by unit cost
Current stock profit potential
$348.00
Current stock multiplied by profit per unit
Estimated traffic orders
62.5
Monthly views multiplied by conversion rate
Sell-through pressure
150.0%
Units sold divided by current stock
What this means
Current stock is at or below the estimated reorder point based on sales pace, lead time, and safety stock.
You sold 36 units over 30 days, creating a daily sales pace of 1.20 units.
With 24 units in stock, you have about 20.0 days of coverage remaining. Your estimated reorder point is 26 units.
To reach about 45 days of target coverage, the calculator recommends restocking 30 units, costing about $540.00.
Consider restocking soon if profit, demand, supplier timing, and cash flow support the purchase.
Restock quantity comparison
| Qty | Cost | Profit | ROI | Days covered | Status |
|---|---|---|---|---|---|
| 10 | $180.00 | $133.50 | 74.2% | 8.3 | Healthy |
| 25 | $450.00 | $333.75 | 74.2% | 20.8 | Healthy |
| 50 | $900.00 | $667.50 | 74.2% | 41.7 | Healthy |
| 100 | $1,800.00 | $1,335.00 | 74.2% | 83.3 | Healthy |
| 200 | $3,600.00 | $2,670.00 | 74.2% | 166.7 | Healthy |
How to use this eBay Inventory Restock Calculator
Enter stock
Add current stock, units sold, and review period to estimate sales velocity.
Add lead time
Include supplier lead time and safety stock coverage so reorder timing reflects delays.
Estimate economics
Add unit cost, profit per unit, storage cost, and defect or unsold risk.
Review restock need
Compare current stock against reorder point, target stock level, cash cost, and profit potential.
eBay inventory restock breakdown
Review how current stock, restock cost, storage, and risk affect inventory decisions.
Current stock value
$432.00
80.0% compared with restock cost
Recommended restock cost
$540.00
100.0% compared with restock cost
Expected restock profit
$435.00
80.6% compared with restock cost
Estimated defect/unsold cost
$27.00
5.0% compared with restock cost
Estimated storage cost
$7.50
1.4% compared with restock cost
Common eBay inventory mistakes
- ×Waiting until stock reaches zero before reordering.
- ×Restocking based on guesses instead of recent sales pace.
- ×Ignoring supplier lead time, shipping delays, prep time, or listing relaunch time.
- ×Buying too much inventory for listings with weak conversion or low profit.
- ×Forgetting storage space, cash flow, defects, returns, or stale inventory risk.
- ×Restocking slow-moving listings before reviewing sold comps and buyer demand.
Understanding your eBay restock results
Restock Soon: Current stock is at or below the estimated reorder point, so a restock may be justified if demand and profit are reliable.
Healthy: Current inventory appears workable under the entered sales pace and lead time assumptions.
Watch Stock: Inventory is not critically low, but stock may need attention soon if sales velocity continues.
Slow Moving: The item has little or no sales velocity in the entered review period, so restocking may be risky.
What eBay sellers should include
- ✓Current available stock or ready-to-list inventory.
- ✓Units sold during a clear review period.
- ✓Supplier lead time, shipping time, prep time, and relisting time.
- ✓Safety stock needed for demand spikes, delays, or supplier issues.
- ✓Unit cost, expected profit per unit, storage cost, and cash flow.
- ✓Conversion rate, traffic, sold comps, seasonal demand, and stale inventory risk.
Ways to improve eBay restock planning
Restock winners first
Prioritize listings with steady sales, strong profit, and manageable returns.
Use reorder points
Set reorder points based on sales pace, lead time, and safety stock instead of guessing.
Protect cash flow
Avoid tying up too much cash in slow-moving inventory or risky seasonal products.
Improve sell-through
Improve photos, price, item specifics, and shipping before buying more weak inventory.