Question 1

What are the 4 modes?

Accepted Answer

Calculate what percentage X is of Y, find what percent X is of Y, compute percentage increase/decrease, and calculate a percentage of a number.

Question 2

How do I calculate a tip?

Accepted Answer

Use "% of Number" mode: enter the tip percentage and the bill amount.

Question 3

How do I calculate profit margin?

Accepted Answer

Use "What %" mode: enter profit as the first number and revenue as the second.

Question 4

How do I use this Percentage Calculator online free?

Accepted Answer

Enter your numbers above and get instant results. Free with no login, works on mobile and desktop.

Question 5

Is this Percentage Calculator accurate?

Accepted Answer

Yes. The Percentage Calculator uses standard formulas and 2026 rules. Always verify big decisions with a professional.

Question 6

What do I need to enter?

Accepted Answer

Just fill the fields above and results update live. No sign-up, free on any device.