Erweiterter Prozentrechner

Sechs Prozent-Rechner in einem. Wert eintippen, Ergebnis sofort — mit Rechenschritten.

Wie viel sind % von ?
Ergebnis —
Rechenschritte anzeigen
ist wie viel % von ?
Ergebnis —
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Von auf ?
Prozentuale Veränderung —
Absolute Veränderung—
Multiplikator—
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% = ?
Ergebnis —
Differenz—
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Rechnung mit % Trinkgeld für Personen
Gesamt —
Trinkgeld—
Pro Person—
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Kosten verkauft für
Marge —
Rechenschritte anzeigen

What is this percentage calculator?

This free tool wraps six percentage workflows — what is X% of Y, X is what % of Y, percentage change, increase/decrease, tip & split, and margin/markup/tax — into a single, locale-aware, browser-only calculator that shows the worked-out steps for every answer.

How do I calculate a percentage online?

Pick a tab — % of value, % change, tip, margin or tax — fill in the numbers, and the result with its derivation appears instantly. Everything is computed locally; nothing is sent to a server.

Key features

Six independent modes
Quickly switch between everyday percentage problems without re-typing values.
Locale-aware numbers
Type 1.234,56 or 1,234.56 — the parser figures it out and formats the answer for your language.
Worked-out steps
Every result expands into the actual formula and intermediate values.
Tip & split helper
Set a percentage with one tap, divide the bill across any number of people.

How to use it

Choose the tab that matches your problem, type the inputs, and the answer updates live. Open Show the steps to see exactly how the result was derived.

Frequently asked questions

What is the difference between margin and markup?

Markup is profit divided by cost; margin is profit divided by selling price. A 50% markup on a $10 cost yields a $15 price, which is a 33.3% margin — they are not the same number.

How is percentage change calculated?

Percentage change = (new − old) / |old| × 100. Going from 80 to 100 is +25%; going from 100 back to 80 is −20%. The two values are not the same because the denominator changes.

Does the calculator handle European decimal commas?

Yes. You can type 1.234,56 or 1,234.56 — the parser auto-detects the format and the result is shown in your preferred locale.

Is anything I type uploaded?

No. The whole tool runs in your browser; numbers and results never leave your device.

Formulas follow standard arithmetic: P × V / 100 for percent-of, (new − old) / |old| × 100 for change, profit/price for margin, profit/cost for markup. Edge cases (division by zero, blank fields) are handled silently.