Price Increase Calculator
Use this price increase calculator to work out the new price after a percentage increase, or to calculate the percentage increase between an old price and a new price. Enter a price and the percentage you want to add, and the new price and the increase amount are shown instantly — handy for product price rises, bills and subscriptions, fuel and energy costs, salaries and service charges, with the full working in pounds sterling.
The price increase formula
New Price = Original Price × (1 + Percentage Increase ÷ 100)
- Divide the percentage increase by 100 and add 1 to turn it into a multiplier — 15% becomes 1.15.
- Multiply the original price by that multiplier to get the new price.
- To find the actual increase amount, subtract the original price from the new price: Increase Amount = New Price − Original Price.
How to use this calculator
- Pick “Increase a price by %” to apply an increase, or “Find the % increase” to compare two prices.
- Enter your figures — for example, £80 increased by 15%.
- The new price or the percentage increase appears instantly, with the increase amount shown alongside.
Worked examples
Product price increase
A product priced at £80 goes up by 15%. New price = £80 × 1.15 = £92. The increase amount is £92 − £80 = £12.
Subscription increase
A monthly subscription rises from £9.99 to £11.49. Increase amount = £11.49 − £9.99 = £1.50. Percentage increase = 1.50 ÷ 9.99 × 100 = 15%.
Fuel or energy price increase
An energy tariff rises by 8%. A bill of £140 becomes £140 × 1.08 = £151.20, an increase of £11.20.
Salary increase
A salary of £32,000 rises by 4%. New salary = £32,000 × 1.04 = £33,280. The increase amount is £1,280 a year.
Service charge increase
A tradesperson raises a £60 call-out charge by 12.5%. New charge = £60 × 1.125 = £67.50, an increase of £7.50.
Price increase, percentage increase and percentage change
These terms are often used interchangeably, but they point at slightly different things. Here is the difference, in plain English.
- Price increase
- A rise in a money amount — the new price minus the old price, expressed in pounds. A £12 rise on an £80 product is a price increase of £12.
- Percentage increase
- That same rise expressed as a percentage of the original price. The £12 rise on an £80 product is a 15% percentage increase.
- Percentage change
- A single figure that covers both rises and falls — a positive result is an increase, a negative result is a decrease. Use the percentage change calculator when the direction is not known in advance.