Everyday Calculators
Quickly solve everyday calculations for tips, prices, percentage changes, discounts and more.
- Tip CalculatorWork out the gratuity and split the bill between friends.Bill × Tip %
- Decrease by PercentageReduce any number by a percentage and see the amount removed.X × (1 − Y ÷ 100)
- Increase by PercentageAdd a percentage on top of a starting amount.X × (1 + Y ÷ 100)
- What Is X% of YFind a percentage of a known number.X × Y ÷ 100
- Percent ChangeFind the percentage increase or decrease between two values.(Y − X) ÷ X × 100
Math You Actually Use
Most day-to-day math happens at a table or a till. The Tip Calculator works out gratuity at any percentage and divides the total between everyone paying, while the Decrease by Percentage Calculator gives you the sale price and the amount saved on a discount.
Going the other way — a raise, a markup, or a price with tax added — use Increase by Percentage. To compare a bill, rent or subscription with what you paid last time, the Percent Change Calculator shows the rise or drop as a percentage.