Percentage & Finance Calculators
Work out discounts, profit margins, loan payments, percentage changes, ROI, and more — results appear as you type.
Whether you're checking a sale price, working out gross margin on a product, figuring out a loan's monthly cost, or measuring year-over-year revenue growth — there's a calculator here for it.
Choose a calculator below to get started.
Top Calculators
Percentage Calculators
View allPercentage increase and decrease, reverse percentage, percentage error, and more.
- Percentage CalculatorFind X% of any number — tips, tax, commissions→
- What is X% of Y?Enter a % and a number — get the amount instantly→
- X is What Percent of Y?Express one number as a percentage of another→
- Percentage Increase CalculatorHow much did a value go up?→
- Percentage Decrease CalculatorHow much did a value drop?→
- Percentage Change CalculatorTrack increases and decreases as a percentage→
- Percentage Difference CalculatorCompare two values with no 'before' or 'after'→
- Reverse Percentage CalculatorFind the original before a % was applied→
- Percentage Error CalculatorHow accurate was a measurement vs expected?→
Finance Calculators
View allProfit margins, discounts, markup, loan repayments, ROI, interest, and break-even analysis.
- Discount CalculatorSee how much you save and what you'll pay→
- Markup CalculatorPrice from cost with a target markup→
- Profit Margin CalculatorRevenue and cost — into a margin percentage→
- Sales Tax CalculatorAdd any tax rate to a price — works for VAT too→
- ROI CalculatorReturn % and net gain on any investment→
- Simple Interest CalculatorSimple interest earned or owed over time→
- Loan Payment CalculatorMonthly repayment and total interest on any loan→
- Weighted Average CalculatorAverage values that don't carry equal weight→
- Break-Even CalculatorHow many units to sell before you cover costs?→
What you can calculate
- Discounts and sale prices — see exactly how much you save and what you pay (e.g. 25% off $80 = $20 off, $60 final)
- Sales tax and VAT — add any tax rate to a price, or reverse from a tax-inclusive total
- Percentage increase and decrease — measure how much a value rose or fell
- Profit margin and markup — gross margin from revenue and cost, or selling price from markup
- Return on investment (ROI) — find the gain or loss on any investment or project
- Loan repayments — monthly payment and total interest on any fixed-rate loan
- Comparisons and ratios — express ratios as percentages or compare two values
Popular calculators
If you're shopping a sale, the Discount Calculator shows your exact savings and final price. For business pricing, the Profit Margin Calculator and Markup Calculator cover both sides — what you keep as profit and what to charge from cost.
For investments and projects, the ROI Calculator gives you the return percentage and net gain instantly. For everyday percentage questions, the What is X% of Y? calculator handles tips, tax amounts, commissions, and more. Pick the one that fits your situation and get your answer in seconds.