Free Calculators for Real Life Stuff
Need to figure out your mortgage payment? Check your BMI? Calculate a tip? We've got you covered. Free tools that give you clear answers, no signup needed.
Check Out Our CalculatorsFind the Right Calculator for What You Need
From home buying to health tracking to everyday math, we've built tools that actually make sense.
Mortgage Calculator
Estimate your monthly mortgage payment. See principal, interest, taxes, and plan your home loan with confidence.
Try It OutAuto Loan Calculator
Calculate your monthly car payment. See how much goes to interest vs principal, and plan your auto loan budget.
Try It OutBMI Calculator
Check where your weight falls health-wise. We explain what the numbers mean in plain English, no medical jargon.
Check YoursRandom Number Generator
Need a random number for a game, contest, or just deciding what to order? Pick your range and we'll give you a number.
Get RandomScientific Calculator
All the functions of a physical scientific calculator, right in your browser. Trig, logarithms, exponents—you name it.
Start CalculatingPercentage Calculator
Quickly calculate percentages, find what percent one number is of another, and calculate percentage increases or decreases.
Start CalculatingAge Calculator
How old are you exactly? In years, months, and days? Find out, or calculate someone else's age for planning gifts or events.
Calculate AgePassword Generator
Tired of thinking up new passwords? We'll create a strong, secure one for you that's actually hard to guess.
Make a PasswordDate Calculator
How many days until your vacation? How long since that big event? Figure out date differences or add/subtract days easily.
Work With DatesBra Size Calculator
Find your perfect bra fit in minutes. Calculate your exact size for US, UK, EU, and French sizing with our easy guide.
Find Your SizeNo calculators found
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Tools for Real Life, Made Simple
Why Our Calculators Are Different
We built Calcula because we got tired of calculator sites that feel like they're designed for accountants or math professors. Our tools are for regular people who just need answers—whether you're buying a house, trying to get healthier, or helping your kid with homework.
No Math Degree Required
We explain everything in plain English. You Do not need to know what "amortization" means to figure out your mortgage. We'll tell you what you're actually paying each month, and why.
For Your Money
Money stuff can be confusing. Our financial calculators help you see the real numbers:
- Mortgage Calculator: See exactly what you'd pay each month for that house you're looking at
For Your Health
Health numbers shouldn't be scary. Our tools help you understand where you're at:
- BMI Calculator: Check your body mass index and what it means for your health
For Math & School Stuff
Whether you're a student, teacher, or just helping with homework:
- Scientific Calculator: All the functions you need for algebra, trig, and advanced math
- Random Number Generator: For games, simulations, or just picking something randomly
For Everyday Life
Little tools that make life easier:
- Age Calculator: How old are you exactly? In years, months, and days?
- Date Calculator: Count days between dates or figure out what day something will fall on
- Password Generator: Create strong passwords that are actually hard to guess, based on NIST password security guidelines
Everything here is completely free. No signup, no email required, no "premium" version hiding behind a paywall. We keep the lights on with non-intrusive ads, not by charging you.
How We Built This
We are a small team who got frustrated with calculator sites that are either too simple or way too complicated. We wanted something in the middle—tools that give you accurate answers but explain them like a friend would. Every calculator uses trusted formulas, but we make sure the results make sense to regular people, not just experts.
We add new calculators based on what people actually ask for. If there is something you need that you don not see here, let us know. We are building this for you.
Quick Tips & Guides
How to get the most out of our calculators.
Getting the Most From Our Mortgage Calculator
Do not just look at the monthly payment. See how much you'll pay in total interest over the life of the loan—it might surprise you.
What Your BMI Number Really Means
BMI isn't perfect, but it's a useful starting point. We'll help you understand what your number means without the medical jargon.
Using Financial Calculators Without the Stress
Financial planning can feel overwhelming. Our tools break it down so you can make smart decisions without needing a finance degree.
Making Retirement Math Less Scary
How much do you really need to save? Our retirement calculators help you see the big picture without the anxiety.
Student Loan Strategies That Actually Work
See how making extra payments or changing your repayment plan affects how much interest you'll pay overall.
Health Numbers You Should Actually Pay Attention To
Beyond BMI—other health metrics that matter and how to track them without obsessing.
Why People Like Using Our Site
We built this differently on purpose.
Fast & Actually Accurate
Get answers in seconds, not minutes. We use the same formulas professionals use, but we explain them like regular people.
Your Info Stays Yours
We Do not see or store any of your data. Everything happens right in your browser. Your mortgage amount or weight is none of our business.
Works Great on Your Phone
Need to calculate a tip at a restaurant? Check your mortgage while house hunting? Everything works perfectly on mobile.
Results That Make Sense
We show you charts and simple explanations so you actually understand what the numbers mean, not just what they are.
Questions People Ask Us
Quick answers to stuff people usually wonder about.
Yep. No hidden fees, no "premium" features, no trial periods. We keep the lights on with basic ads that Do not get in your way. We think everyone should have access to good calculator tools without paying for them.
We use the same formulas banks, doctors, and schools use. For big financial or health decisions, we always say "talk to a professional," but for planning and figuring things out, our tools give you solid numbers you can trust.
Nope. All the calculating happens right in your browser. We Do not see what numbers you put in, and we Do not store anything. Your mortgage amount, your weight, your age—that's your business, not ours.
Absolutely. The site adjusts to whatever screen you're using. People use our calculators on phones at restaurants, tablets on the couch, and computers at work. Whatever works for you.
We add new tools all the time based on what people ask for. If you need a calculator for something specific and do not see it here, drop us a line. We're building this for real people with real needs.