Zellio.io

Discount Calculator

See the final price and your savings on any percentage off.

Processed locally — nothing is uploaded

About Percentage & Finance Calculator

The loan figures use the standard amortising formula, where the monthly payment stays level while the split between interest and principal shifts across the term. That is why total interest, rather than the monthly number, is the figure worth comparing between two offers.

Work out the final sale price and exactly how much you save from any percentage discount in seconds. The figures are calculated on your device, alongside tip and loan tools.

Work out percentages and percentage change, sale discounts and final prices, tip splits per person, and monthly loan or EMI payments with total interest — all in one place. It covers the everyday money maths that comes up while shopping, dining out, budgeting and comparing loans.

Switch between modes to answer 'what is X% of Y', 'how much do I save', 'what is each person's share' or 'what will this loan cost'. Percentage change is the one to double-check: 40 rising to 50 is a 25% increase, while 50 falling back to 40 is a 20% decrease.

Learn how this works

Everyday Calculations & Conversions Made SimpleConvert units and time zones, and calculate age, BMI, discounts and loan EMIs — a plain-English guide with free in-browser tools.7 min read

Frequently asked questions

How do I work out a discount by hand?

Multiply the original price by the discount percentage to get the saving, then subtract it: £80 at 25% off is £80 × 0.25 = £20 saved, so £60 to pay. The shortcut is to multiply by what you still pay — £80 × 0.75 — which gets there in one step.

How do stacked discounts work — is 20% then 10% the same as 30%?

No, and the difference catches people out. Successive discounts apply to the already-reduced price, so 20% then 10% off £100 gives £72, not £70. Stacked percentages always total less than their sum.

Does the calculation include sales tax or VAT?

The discount is applied to whatever figure you enter. If your price already includes VAT, the result includes it too; if it excludes VAT, add the tax to the discounted figure afterwards.

Common Use Cases

  • •Checking a sale price at the shelf before deciding whether it is really a deal
  • •Working out the final price when a voucher stacks on top of a sale
  • •Setting a promotional price that still clears a target margin

More Percentage & Finance Calculator tools

Percentage & Finance CalculatorTip Calculator & Bill SplitterLoan EMI Calculator

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