Cost Calculator

Calculate total cost from unit price and quantity, with optional discount, tax, shipping, and fees.

How to Use

  1. Enter Unit Cost and Quantity.
  2. Optionally add a Discount, Tax, Shipping, or Extra Fees.
  3. Results update instantly (no URL changes while typing).
  4. Use Share Link to generate a restoreable URL.
Inputs
All fields are optional except Unit Cost and Quantity.
Cost per item, hour, unit, etc.
Supports decimals for weight/hours if needed.
Percent is applied to subtotal (unit × qty). Amount subtracts directly.
Rate applies after discount. Amount adds directly.
Added after tax (displayed separately in Show Work).
Handling, service fees, etc.
Results

Totals update instantly as you type.

Subtotal
—
Discount
—
Tax
—
Shipping
—
Extra Fees
—
Total
—
Enter unit cost and quantity to begin.
Per Unit (final)
—
Per Qty 1
—
Show Work (step-by-step)
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Work is shown using money math. If “Round to cents” is enabled, outputs are rounded to 2 decimals.

Calculation Details

  • Subtotal = Unit Cost × Quantity
  • Discount (percent) = Subtotal × (Discount% ÷ 100)
  • Discounted Subtotal = Subtotal − Discount
  • Tax (rate) = Discounted Subtotal × (Tax% ÷ 100)
  • Total = Discounted Subtotal + Tax + Shipping + Extra Fees

Tip: Use “Amount” modes when you already know the exact discount/tax value (instead of a percent).

Tool Info

Last updated:

Updates may include improved rounding behavior, edge-case handling, and expanded options.