← Back to Home
All Percentage Calculators
Every calculator on percentagefast in one place. All free. All instant. Nothing leaves your browser.
13 calculators across 3 categories · last updated May 2026
General Percentages
The core formulas — find a percent of a value, work backwards from a part and a whole, or compare two numbers.
- Percentage of a NumberWhat is X% of Y? Quick calculations for tips, taxes, discounts, and any "percent of" question.
- Percentage of TotalWhat percent is X of Y? Useful for understanding part-of-whole relationships in budgets, surveys, or test scores.
- Percentage Change CalculatorCalculate the percent change from one value to another — increase or decrease, with full step-by-step explanation.
- Percentage Change (quick)A streamlined version of the percentage-change tool focused on the headline number.
- Percentage IncreaseSpecifically for increases — common for stock gains, salary bumps, and growth metrics.
- Percentage DifferenceSymmetric percent difference between two values (mean-based formula). Used in scientific comparisons and measurements.
Money & Shopping
Everyday percent-math for restaurants, stores, paychecks, and tax bills.
- Tip CalculatorCompute tip amount, total bill, and per-person split. Side-by-side comparison at 15%, 18%, 20%, and 25%.
- Discount CalculatorFind your savings and final price after any percent-off discount. Stackable with sales-tax math.
- Sales Tax CalculatorAdd sales tax to any pre-tax price. Quick presets for California, Texas, NY, and more.
- Salary Raise CalculatorSee what a raise means in dollars — annual, monthly, and per biweekly paycheck. Compare common raise sizes.
Business Pricing
For pricing, margin analysis, and sales compensation. Includes the markup-vs-margin distinction that trips up most retail spreadsheets.
- Profit Margin CalculatorCost + selling price → margin and markup. The right tool when you have both prices and want to evaluate the deal.
- Markup CalculatorCost + markup % → selling price. The inverse of the margin calculator — use when you are setting a price from cost up.
- Commission CalculatorCommission earned on any sale, with quick presets for real estate, SaaS, insurance, and affiliate rates.
Need a quick percentage calculation?
The percentagefast homepage has a fast natural-language calculator that handles most one-off questions in plain English.