percentguru

Free Percentage & Finance Calculators

34 free calculators for percentage increase, discounts, VAT, GPA, profit margins, loan payments, and more. Results appear instantly as you type — no account, no ads blocking the answer.

Each calculator shows the formula, worked examples, and explains the result — not just the number.

Top Calculators

Discount CalculatorSee how much you save and what you'll pay→What is X% of Y?Enter a % and a number — get the amount instantly→Mortgage CalculatorMonthly payment and total interest from home price, rate, and term→Percentage Increase CalculatorHow much did a value go up?→Savings CalculatorProject savings growth from contributions and interest over time→GPA CalculatorLetter grades + credit hours → GPA on the 4.0 scale→Salary to Hourly CalculatorAnnual salary → hourly, daily, weekly, and monthly rates→Percentage Change CalculatorTrack increases and decreases as a percentage→

Percentage Calculators

19 tools
  • Percentage increase, decrease & change
  • Grade, GPA & fraction converters
  • Decimal ↔ percent, tip & percent off
  • Reverse percentage, error & more
Browse all percentage calculators →

Finance Calculators

15 tools
  • Discount, markup & profit margin
  • VAT, sales tax & cost reduction
  • ROI, break-even & loan payment
  • Compound interest, weighted average & more
Browse all finance calculators →

Quick answers

Common percentage questions — tap for the full calculation.

20% of 50?10% of 100?15% of 200?25% of 80?10% off 50?20% off 100?10% increase from 100?50 is what % of 200?

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)
  • VAT and sales tax — add or remove VAT at any rate, or calculate US sales tax on a purchase
  • Percentage increase and decrease — measure how much a value rose or fell as a percentage
  • Profit margin and markup — gross margin from revenue and cost, or selling price from cost and markup
  • GPA and grades — calculate GPA on the 4.0 scale or convert any score to a percentage and letter grade
  • Return on investment (ROI) — find the gain or loss percentage on any investment or project
  • Loan repayments — monthly payment and total interest on any fixed-rate loan
  • Fractions and ratios — convert fractions to percentages, or express one number as a percentage of another

Popular calculators

For home buyers, the mortgage calculator shows the exact monthly payment and total interest before you make an offer. The savings calculator projects how any combination of initial deposit and monthly contributions grows over time. For shopping, the discount calculator shows exact savings and final price.

For business pricing, the profit margin calculator and markup calculator cover both sides. For students, the GPA calculator and grade calculator convert marks to percentages and grade point averages. For everyday questions, the what is X% of Y calculator handles tips, tax amounts, and commissions.