Free Percentage Calculator Online

The easiest and fastest way is using our free online percentage calculator. You can calculate what percent a number is of another, find a value based on a percentage, or solve basic percentage math problems with instant, precise results.

To find the percentage increase, subtract the original (starting) value from the new value, divide the difference by the original value, and multiply by 100. For example, if a price grows from $50 to $65, the growth is ($15 / $50) * 100 = 30%. You can use our percentage increase calculator to handle this instantly.

The formula to calculate percentage decrease is: ((Original Value - New Value) / Original Value) * 100. For example, if a product price is reduced from $80 to $60, the reduction rate is (($80 - $60) / $80) * 100 = 25%. Our percentage decrease calculator solves this with a single click.

Use percentage difference when comparing two values of the same kind without a baseline or starting point (e.g. comparing the height of two buildings). Use percentage change (increase or decrease) when there is an old value and a new value over time (e.g., comparing yearly sales revenue). Use our percentage difference calculator for non-directional comparisons.

A reverse percentage calculator works backward to find the original 100% total value when you only know a part and its percentage value. The formula is: (Part / Percentage) * 100. This is highly useful for determining pre-tax prices or finding original product prices before a discount was applied.

To calculate a discount, multiply the original price by the discount percentage rate divided by 100 to get your total savings amount. Subtract the savings from the original price to get the final sale price. For a 20% discount on a $150 item, the savings is $30, and the final price is $120. Our discount calculator handles standard and double discounts.

To add GST to a net price, multiply the price by (1 + GST%/100). To remove GST from a total gross amount, divide the total price by (1 + GST%/100). For instance, removing an 18% GST from $118 gives a net price of $100. Try our GST calculator for fast exclusive and inclusive tax outputs.

To calculate a tip, multiply your bill amount by the tip percentage (e.g. 15% = 0.15). Add the tip to the bill to find the total payment. To split it, divide the total bill by the number of people. Our online tip calculator splits bills and rounds results instantly.

To find the sales tax, multiply the pre-tax cost of an item by the tax rate in decimal form (e.g. 8.25% = 0.0825). Add this tax amount to the pre-tax price for the total retail cost. Our sales tax calculator simplifies this calculation.

Profit margin is profit divided by the selling price (revenue), expressing profit as a portion of the final sales amount. Markup is profit divided by the cost price, expressing how much the cost was increased to set the selling price. If an item costs $50 and sells for $100, the markup is 100% but the profit margin is 50%. Our margin calculator and markup calculator help you analyze these values easily.

To convert a fraction to a percentage, divide the top number (numerator) by the bottom number (denominator) to get a decimal value, then multiply that decimal by 100 and add the percent symbol (%). For example, 3/5 is 0.6, which equals 60%. Use our fraction to percentage calculator for quick conversions.

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