Welcome to Quick Percentage Calculator—a powerful, zero‑cost, web‑based tool crafted to make percentage and math problems as simple as possible. From everyday discount calculations to complex compound interest projections, we provide instant accuracy without requiring downloads or sign‑ups. Our clean interface puts you in control, whether you’re on desktop or mobile.
All‑In‑One Calculation Suite
Our platform offers multiple calculators in one place:
- Percentage Basics:
X% of Y = (X / 100) × Y
- Reverse Percentage:
What % is X of Y = (X ÷ Y) × 100
- Percentage Change:
Change % = [(New − Old) ÷ Old] × 100
- Compound Interest:
A = P × (1 + r/n)n·t
Here P = principal, r = annual rate, n = compounding periods per year, t = years. For daily compounding: n = 365.
- Fraction & Decimal Conversion:
Fraction to % = Fraction × 100; Decimal to % = Decimal × 100
Why We Stand Out
- Instant, Client‑Side Processing: All calculations happen in your browser—no waiting, no page reloads, and no data leaves your device.
- Ad‑Supported but Non‑Intrusive: Enjoy full features for free; ads live quietly in sidebars without pop‑ups or distractions.
- Responsive & Accessible: Large inputs, clear labels, and full keyboard support make our tools usable by everyone—including those with visual or motor impairments.
- Educational Focus: Every formula is visible alongside your results, with worked examples to help you truly understand—not just compute.
- Full Transparency: We link to all formulas and explain each step. No “black‑box” math—just open, trustworthy calculations.
How to Use Our Calculators
- Select the tool from the menu—Percentage, Math, or BMI Calculator.
- Enter your values in the clearly labeled fields. You can click buttons or type via keyboard.
- Press Calculate (or Enter) to see results instantly.
- For compound interest, view both the final amount and a detailed earnings schedule. Download a CSV for your records.
- Need more clarity? Expand our FAQ at the bottom of each tool page to see definitions, formulas, and step‑by‑step examples.
Real‑World Examples & Context
Discount Pricing: If a $120 item is marked 15% off, discount = 120 × 0.15 = $18, so sale price = $120 − $18 = $102.
Tip Calculation: For a $75 bill and 18% tip: tip = 75 × 0.18 = $13.50.
Loan Growth: A $1,000 investment at 5% APR compounded daily for 3 years: