Kategorie

Mathematik Tools

Geometry, percentages, fractions, statistics — math utilities with formulas shown.

Overview

Math tools that hide their math aren't tools, they're cheating. Every calculator here shows the formula being applied — useful for students learning, professionals double-checking, and anyone who wants to understand (not just trust) the result. Coverage includes geometry, arithmetic, percentages, and combinatorics.

Common Use Cases

→Calculate circle and triangle areas with formula explanations.
→Convert fractions to decimals (and back) precisely.
→Compute percentage change, markup, and margin.
→Pick random numbers for statistical sampling.

Featured Tools

Frequently Asked Questions

How precise are decimal-to-fraction conversions?

We find the simplest fraction within a tolerance you can configure (default 1e-6). 0.333333 → 1/3, 0.142857 → 1/7, etc. For repeating decimals, the tool detects the pattern when possible.

Are random numbers truly uniform?

Yes — we use crypto.getRandomValues, the same source used for cryptographic keys. Each value in your range is equally likely.

Can I solve equations?

Most math tools here are calculators, not symbolic solvers. For x² + 3x − 4 = 0 style equations, look for the quadratic equation solver specifically.

Prozentrechner

Prozentsätze, Steigerungen und Differenzen einfach berechnen.

Altersrechner

Berechnen Sie Ihr genaues Alter in Jahren, Monaten und Tagen.

Prozentualer Änderungsrechner

Berechnen Sie die prozentuale Änderung zwischen zwei Werten.

Bruch zu Dezimal Umrechner

Wandeln Sie Brüche sofort in Dezimalzahlen um.

Dezimal zu Bruch Umrechner

Wandeln Sie Dezimalzahlen sofort in Brüche um.

Zufallszahlen-Generator

Zufallszahlen in einem benutzerdefinierten Bereich sofort generieren.

Kreisflächen-Rechner

Fläche, Umfang und Durchmesser eines Kreises berechnen.

Dreiecksflächen-Rechner

Berechnen Sie die Fläche eines Dreiecks.