Price × Quantity Calculator
Multiply any unit price by a quantity to get a subtotal, then optionally apply a percentage discount and a tax or VAT rate — in the correct commercial order — to reach the final payable amount.
%
%
Final amount after discount and tax
- 1
Subtotal
25 × 10 = 250 - 2
Total
250 + 0 = 250
How does this calculator work?
Total = unit price × quantity, with a percentage discount deducted from the subtotal first and tax added last. For example: 10 units at $25 with 10% discount and 20% VAT gives subtotal $250, discount −$25 = $225, VAT +$45 = $270 total. Discount always applies before tax.
Formula
How this is calculated
The most common pricing mistake is applying tax before discount (or vice versa) and getting different totals. This calculator uses the standard commercial sequence: multiply unit price by quantity to get the subtotal, deduct any percentage discount from that subtotal, then apply tax or VAT to the discounted amount. This matches the way most invoices and purchase orders are calculated worldwide.
The tax field represents any percentage levy added after the sale price is agreed — VAT, GST, sales tax, etc. If your price already includes tax, leave that field at 0 and use only the discount field. Both fields default to 0 so the result is a plain quantity × price when you do not need them.
Note that some jurisdictions compute tax on the pre-discount price (certain US state coupon rules, for example). If that applies to your situation, add subtotal tax first and treat the discount separately — the calculator uses the standard post-discount tax approach.
Frequently asked questions
The discount is applied first (reducing the subtotal), and tax is calculated on the discounted amount. This is the standard approach used on most commercial invoices.
Work backwards: unit price = total ÷ (quantity × (1 − disc%) × (1 + tax%)). Divide the known total by quantity, then reverse the discount and tax multipliers.
Yes. Enter the per-unit cost, the number of units, any volume discount percentage and the applicable tax rate to get the exact payable amount for the order.
Also known as
TG we-Calculate Editorial Team. (2026). Price × Quantity Calculator [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/price-quantity-calculator
TG we-Calculate Editorial Team. "Price × Quantity Calculator." TG we-Calculate. 2026. https://we-calculate.com/calculator/price-quantity-calculator.
TG we-Calculate Editorial Team, "Price × Quantity Calculator," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/price-quantity-calculator
@misc{wecalculate_price_quantity_calculator, title = {Price × Quantity Calculator}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/price-quantity-calculator}}, year = {2026}, note = {TG we-Calculate} }
Did this calculator help you?