Is the currency converter free to use?

Yes, Konvertibly's currency converter is completely free with no hidden fees, sign-up requirements, or usage limits. Convert between 154 currencies unlimited times.

How accurate are the exchange rates?

Our exchange rates are sourced from trusted financial data providers (ExchangeRate-API and Fixer.io) and updated hourly. We show mid-market rates, which are the most accurate representation. Banks typically add 2-5% markup to these rates.

How often are currency rates updated?

Currency exchange rates are updated every hour from multiple reliable financial data sources to ensure accuracy and reliability.

Can I use this for financial transactions?

Our rates are for informational purposes only. While highly accurate, always verify exchange rates with your bank or financial institution before making actual transactions.

Do you support cryptocurrencies?

Yes, Konvertibly supports 27 popular cryptocurrencies including Bitcoin (BTC), Ethereum (ETH), and other major coins, with real-time conversion rates.

📖 New to this tool? Read the step-by-step guide →

🔢 Math Calculator

Professional mathematical conversions and calculations. Convert fractions, decimals, number systems, and perform geometric calculations with step-by-step solutions.

Conversion Result

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Step-by-Step Solution

Common Mathematical Calculations

1/2

→

0.5

0.75

→

3/4

→

1010₂

90°

→

π/2 rad

FF₁₆

→

255

0.25

→

25%

r = 5

→

A = 78.54

1111₂

→

Math Categories

🔢

Fractions & Decimals

1/2 ↔ 0.5 0.75 ↔ 3/4 25% ↔ 0.25

🧮

Number Systems

10 ↔ 1010₂ 255 ↔ FF₁₆ 8 ↔ 10₈

📐

Geometry

Circle Area Square Area Volume

📏

Trigonometry

90° ↔ π/2 sin, cos, tan Radians ↔ Degrees

📊

Algebra

Linear Equations Quadratic Solver Factoring

📈

Statistics

Mean & Median Standard Dev Probability

🔄

Sequences

Arithmetic Geometric Fibonacci

∫

Calculus

Derivatives Integrals Limits

📐 How It Works

Counts ordered arrangements of r items chosen from n. Order matters — choosing ABC is different from choosing BAC.

P(n,r) = n! / (n−r)!

🔢 Worked Examples

P(5,2) = 20 (5×4)
P(10,3) = 720 (10×9×8)
P(6,6) = 720 = 6!
P(8,1) = 8

📋 Common Use Cases

Race podium outcomes (1st, 2nd, 3rd from 10 runners)
PIN code combinations (ordered 4 digits from 10)
Scheduling — ordered list of tasks
Password generation (ordered character sets)

💡 Did You Know?

The total number of permutations of a 9×9 Sudoku puzzle (before constraints) is P(81,81) = 81! ≈ 5.8×10¹²⁰ — but valid Sudokus number only about 6.7×10²¹.

⚠️ Common Mistake

Using permutations when order doesn't matter — "choose 3 toppings from 10" is a combination, not a permutation. C(10,3) = 120, not P(10,3) = 720.