Your privacy is protected! No data is transmitted or stored.
Frequently Asked Questions
Use the "% of a Number" mode. Enter the percentage and the number — for example, 20% of 500 = 100. Formula: Result = (Percentage / 100) × Number.
Use the "X is what % of Y" mode. Enter both numbers — for example, 25 is what % of 200? Answer: 12.5%. Formula: % = (X / Y) × 100.
Use the "% Increase / Decrease" mode. Enter the original value and new value. The calculator shows the percentage increase or decrease. Formula: % Change = (New − Old) / Old × 100.
Key formulas: (1) X% of Y = (X/100) × Y. (2) X is what % of Y = (X/Y) × 100. (3) % Change = (New−Old)/Old × 100.
If the new value is greater than the old, the result is a percentage increase. If the new value is less, it's a percentage decrease. CodBolt automatically labels it as "Increase" or "Decrease" based on the values.
Yes, CodBolt's Percentage Calculator is completely free — no signup, no ads, no limits. All 3 calculation modes work instantly in your browser.