Calculation Tools

Fraction Calculator

Master the math of parts. Handle complex operations with mixed numbers and unlike denominators. Get step-by-step solutions for homework, carpentry, or...

Convert kW to HP

Bridge the gap between the electric future and the combustion past. Convert engine power from Kilowatts (kW) to Mechanical Horsepower (HP). Essential ...

Inches to CM Converter

Bridge the gap between the US Imperial system and the Metric world. Instantly convert inches to centimeters with exact precision defined by the Intern...

Percentage Calculator

Master the math of money. Instantly calculate tips, discounts, and sales tax. Solve the three most common percentage problems: "What is X% of Y?", "Pe...

Ratio and Proportion Calculator

Solve "A is to B as C is to X". Instantly find the missing value in any proportion. Essential for scaling cooking recipes, resizing digital images wit...

Stopwatch Timer Calculator

Master your time. Whether you are tracking interval training, cooking the perfect steak, or billing a client by the minute, use this precision tool to...

Modulo Calculator

Perform modular arithmetic instantly. Calculate the remainder when one number is divided by another. Essential for programmers, cryptographers, and so...

Compound Growth Calculator

See the "Snowball Effect" in action. Project how your 401(k), IRA, or stock portfolio grows over time. Understand why "Time in the Market" matters mor...

IBAN Calculator and Validator

Sending money abroad? Don't let a typo cost you $50 in wire fees. Validate the structure and checksum of any IBAN instantly to ensure your payment rea...

Scrap Gold Calculator

Don't sell your jewelry blindly. Calculate the exact "Melt Value" of your scrap gold based on its weight and Karat purity. Understand the difference b...

Bitcoin Calculator

Track the pulse of the digital economy. Convert Bitcoin (BTC) to US Dollars instantly. Calculate the precise value of fractional shares (Satoshis) and...

Currency Converter

Get real-time mid-market exchange rates. Convert any currency amount instantly and visualize the difference between the "Real Rate" and the "Retail Ra...

Margin Calculator

Secure your bottom line. Accurately calculate Gross Margin, Markup Percentage, and the final Selling Price. Understand the critical difference between...

Ethereum Calculator

Convert Ethereum to US Dollars instantly. Calculate the real cost of transactions by analyzing Gas Fees (Gwei), estimate your Staking rewards (Validat...

About Online Calculator

Welcome to TvojKalkulator.com, your premier destination for instant, accurate, and free calculation tools. Whether you are managing finances, tracking health goals, or planning across borders, our platform bridges the gap between complex data and actionable insights. We pride ourselves on delivering a user-friendly experience without the need for sign-ups or downloads.

Plan Your Dream Home: Mortgage Calculator

Buying a home is likely the biggest financial decision you will make. Our comprehensive Mortgage Calculator helps you navigate this complex process with confidence. By factoring in the principal loan amount, interest rates, and loan terms, you can visualize your monthly payments and amortization schedule instantly. This tool is essential for comparing lender offers and ensuring your new home fits comfortably within your long-term budget.

Connect Globally: Time Zone Converter

In an increasingly connected world, scheduling meetings or calls across continents can be a headache. Our precise Time Zone Converter and date duration tools eliminate confusion. Whether you are coordinating a business conference or calling family abroad, easily calculate the exact time difference and find the perfect window for connection. Manage your global schedule effortlessly with our time tools.

Prioritize Wellness: BMI Calculator

Understanding your body metrics is the first step towards a healthier life. Our scientifically calibrated BMI Calculator (Body Mass Index) allows you to assess your weight category based on your height. Beyond BMI, explore our suite of health tools including daily calorie estimators and ovulation trackers. We provide the data you need to make informed decisions about your diet, fitness, and well-being.