How to Calculate Shopping
What is Shopping?
Shopping calculators cover discount stacking, sale price calculation, price comparison, cashback earnings, and value-for-money analysis across different products and pack sizes.
Formula
Step-by-Step Guide
- 1Stacked discounts multiply: 20% then 10% off = (0.8×0.9) = 28% total discount (not 30%)
- 2Unit price: total price / quantity in same units
- 3Cashback: spend × rate / 100
- 4VAT-inclusive price: net price × (1 + VAT rate)
Worked Examples
Frequently Asked Questions
What is Shopping?
Shopping calculators cover discount stacking, sale price calculation, price comparison, cashback earnings, and value-for-money analysis across different products and pack sizes. Use this calculator for accurate, instant results.
How accurate is the Shopping calculator?
The calculator uses the standard published formula for shopping. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.
What units does the Shopping calculator use?
This calculator works with inches, percentages. You can enter values in the units shown — the calculator handles all conversions internally.
What formula does the Shopping calculator use?
The core formula is: Stacked discounts multiply: 20% then 10% off = (0.8×0.9) = 28% total discount (not 30%). Each step in the calculation is shown so you can verify the result manually.