Prozentrechner — Kostenloses Online-Tool
Prozente, Erhöhungen, Rabatte & mehr berechnen
Kostenloser Prozentrechner. X% von Y, prozentuale Zu- und Abnahme berechnen. Sofort, browserbasiert.
Enter numbers to calculate
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Free percentage calculator — four calculations in one
Toololis Percentage Rechner handles the four most common percentage questions in one place: X% of Y, X is what percentage of Y, percentage change from A to B, and adding/subtracting a percentage to a value. Live results as you type. Works on phones, tablets, and desktop.
The four percentage questions
- X% of Y — "What is 20% of 80?" → 16 (for tips, discounts, tax)
- X is what % of Y — "30 is what % of 150?" → 20% (for test scores, market share)
- % Change — "From 50 to 75?" → +50% (for price changes, performance)
- Add / Subtract % — "100 plus 15%?" → 115 (for tax, markup, discount)
How to use this tool
- 1
Choose a calculation type
Four tabs handle the four common percentage questions: X% of Y, X is what % of Y, percentage change, and after-percentage value.
- 2
Enter your numbers
Type into the two number fields. Results update live as you type — no need to click a button.
- 3
Read the result
The big number at the bottom is your answer. A plain-language sentence explains what it means.
Common real-life percentage calculations
- Restaurant tip — Bill $80, 18% tip: 80 × 0.18 = $14.40
- Sale discount — $120 item, 25% off: 120 × 0.75 = $90
- Sales tax — $50 + 8% tax: 50 × 1.08 = $54
- Test score — Got 42/50: (42/50) × 100 = 84%
- Stock gain — Bought $100, now $143: (143-100)/100 × 100 = 43% gain
- Salary raise — $50k + 8% raise: 50000 × 1.08 = $54,000
Frequently Asked Questions
How do I calculate X% of Y?
How do I find what percentage X is of Y?
How do I calculate percentage change?
How do I add X% to a value?
Why does percentage math seem confusing?
Is this calculator accurate for financial use?
Wichtigste Punkte
- Percentage Rechner is a free, browser-based finance tool — calculate percentages, increases, decreases & more.
- Nein signup, no downloads, no file uploads. Tools run in your browser; the few that need an outside service say so on the page.
- Works on desktop, tablet, and mobile. Install as a PWA for offline access.
How to Use Percentage Rechner
- Open the tool: Launch Percentage Rechner on Toololis — no account or download needed.
- Enter your data: Paste text, enter values, or select a file directly in your browser.
- Get instant results: Everything is processed locally — results appear immediately.
- Copy or download: Save your output or share it. Bookmark for quick access next time.
Percentage Rechner — Quick Facts
- Preis
- Kostenlos — keine Limits, kein Wasserzeichen, keine Paywall
- Privatsphäre
- Wird im Browser verarbeitet. Tools, die einen externen Dienst brauchen, sagen das auf der Seite. Seitenaufrufe werden gezählt (Google Analytics).
- Plattform
- Jeder moderne Browser — Desktop, Tablet, Mobil
- Kategorie
- Finance Tools on Toololis
- Offline
- Works offline after first visit (Progressive Web App)
| Merkmal | Details |
|---|---|
| Tool | Percentage Rechner |
| Kategorie | Finance |
| Anmeldung nötig | Nein |
| Datei-Upload | Keine — wird im Browser verarbeitet |
| Mobile-Unterstützung | Voll responsive |
| Kosten | Für immer kostenlos |
Why Use Percentage Rechner?
You should try Percentage Rechner for a quick, private way to calculate percentages, increases, decreases & more. Processing happens in your browser and files are never uploaded; the few tools that need an outside service say so on the page.
On the other hand, dedicated APIs or desktop tools suit batch processing better. They also handle server-side automation. For everyday tasks, browser tools offer the best speed, privacy, and convenience.