Why use this calculator?
A working calculator shirt can include a printed design, a keypad, a display module, wiring, batteries, packaging, and finishing. These details make pricing harder than a normal apparel order. This calculator keeps the job simple. It groups material, labor, waste, overhead, fees, tax, discounts, and shipping into one clear estimate.
Cost planning matters. A single missed part can reduce profit. A wrong labor estimate can make a winning design lose money. The tool helps you test different order sizes, margin goals, and retail prices before accepting a custom request.
Formula approach
The calculator first totals item based costs. It multiplies quantity by the blank shirt cost, print cost, calculator module cost, battery cost, and packaging cost. It then adds design fees and labor cost. Waste cost is applied next, because prototypes and damaged pieces are common in wearable projects. Overhead is added to cover tools, workspace, admin time, and small supplies.
Shipping and discounts are included after those steps. The final project cost is divided by quantity to find unit cost. The suggested selling price uses the target margin, platform fee, and tax rate. If a selling price is entered, the tool also shows expected revenue, profit, margin, and markup.
How to use this calculator
Start with the order quantity. Enter the cost of one blank shirt. Add printing, module, battery, and packaging costs per shirt. Enter design fees once for the whole project. Then add labor hours and hourly rate. Use waste percentage when testing early prototypes. Use overhead percentage for hidden business costs.
Set platform fees and tax if the price must cover them. Add a discount when a supplier lowers the bill. Enter a target margin to create a recommended selling price. Add an actual selling price to compare your plan with reality. Review the result above the form. Download the CSV for spreadsheets. Use the PDF button for a client report.
Best practices
Always test a batch first. Record each part cost from invoices. Update labor time after real assembly. Keep a reserve for returns, broken displays, weak batteries, and packaging changes. A strong estimate protects your margin and helps buyers understand why a working shirt costs more than a printed shirt.