Advanced Calculator Inputs
Example Data Table
| Order | Inner Size (cm) | Board Grade | Blank Size (cm) | Area per Box (m²) | Total Cost | Unit Cost |
|---|---|---|---|---|---|---|
| 500 boxes | 25 × 18 × 12 | 3 Ply | 90 × 32 | 0.2880 | $237.40 | $0.47 |
| 1,000 boxes | 30 × 20 × 15 | 5 Ply | 104 × 38 | 0.3952 | $723.77 | $0.72 |
| 2,500 boxes | 40 × 28 × 22 | 7 Ply | 140 × 52 | 0.7280 | $3,130.25 | $1.25 |
These rows are illustrative examples. Actual values depend on local rates, artwork coverage, machine setup, carton style, and production waste.
Formula Used
Assumption: The calculator estimates a regular slotted corrugated carton blank using practical glue, flap, and trim allowances.
1. Flap Depth
Flap Depth = (Inner Width ÷ 2) + Flap Allowance
2. Blank Length
Blank Length = 2 × (Inner Length + Inner Width) + Glue Flap + Trim Allowance
3. Blank Width
Blank Width = Inner Height + 2 × Flap Depth + Trim Allowance
4. Blank Area per Box
Blank Area = (Blank Length × Blank Width) ÷ 10,000
5. Gross Board Area
Gross Board Area = Blank Area × Quantity × (1 + Waste %)
6. Board Cost
Board Cost = Gross Board Area × Board Rate per m²
7. Printing Cost
Printing Cost = Gross Board Area × Print Rate per m² per Color × Ink Colors × Printed Sides
8. Cost Before Profit
Cost Before Profit = Board + Printing + Conversion + Coating + Setup + Transport + Overhead
9. Recommended Sell Price
Recommended Total = Cost Before Profit × (1 + Profit %)
How to Use This Calculator
- Enter the internal box dimensions in centimetres.
- Choose the order quantity, board grade, and flute type.
- Insert board rate, print rate, colors, and print sides.
- Add setup, transport, coating, and conversion costs.
- Set glue flap, trim, and flap allowances.
- Provide waste, overhead, and target profit percentages.
- Click Calculate Cost to display results above the form.
- Review the table, summary cards, and Plotly graph.
- Use the CSV or PDF buttons to export the result.
Frequently Asked Questions
1. What does this calculator estimate?
It estimates corrugated box cost using board area, waste, printing, conversion, coating, setup, transport, overhead, and profit. It is useful for pricing ecommerce packaging jobs and testing margin scenarios before quoting customers.
2. Why is blank size larger than inner size?
A carton blank must include body panels, flaps, a glue joint, and trim allowance. That extra material creates the final folded structure and directly affects board area, total material consumption, and cost.
3. How does waste affect the total?
Waste increases the gross board area purchased or consumed. Higher waste raises board cost and printing cost because more sheet area moves through production, even though saleable box quantity stays unchanged.
4. Should I enter rates before or after markup?
Enter operational costs before markup. The calculator first builds production cost, then adds overhead and profit. This gives a cleaner view of manufacturing economics and a more transparent recommended selling price.
5. Can this help compare suppliers?
Yes. Change the board rate, print rate, setup fee, and transport total to compare competing supplier quotes. The cost breakdown highlights which input drives the biggest pricing difference.
6. What is the material utilisation index?
It is a simple planning ratio showing internal box volume relative to material area. It does not replace engineering compression testing, but it helps compare packaging efficiency across box sizes.
7. Does the calculator support export packaging?
Yes. You can choose heavier board grades, increase allowances, add more coating cost, and raise transport or overhead values. That helps model stronger cartons used in export or fragile product shipping.
8. Are the results exact factory quotations?
No. The results are planning estimates. Actual quotations may vary because of supplier minimums, sheet optimization, tooling policy, print coverage, labor rates, local taxes, and negotiation terms.