We Added 6 Calculators. None of Them Want to Sell You a Mortgage.
Here’s a fun fact that shouldn’t surprise anyone but somehow still does: “percentage calculator” is one of the most searched terms on the entire internet. Millions of people, every single month, open a browser tab and ask the internet to help them figure out what 15% of 80 is.
No judgment. Math is hard. (Or at least, math at 11pm when you’re splitting a dinner bill four ways after a bottle of wine is hard.)
We just shipped six calculators to EasyWebTools, and we’d like to tell you about them — but first, let’s talk about why the calculators you’ve been using might have an agenda.
The Calculator That Wants to Sell You Something
Google “mortgage calculator” right now. Go ahead, we’ll wait.
The top results are from banks, lenders, and financial comparison sites. Every single one of them has the same basic calculator — principal, rate, term, monthly payment — but it’s surrounded by calls to action. “Get pre-approved today.” “Compare rates from 12 lenders.” “See what you qualify for.” The calculator isn’t the product. You are the product. Your interest in buying a home is a data point worth money to someone.
The same pattern shows up with BMI calculators on health sites, investment calculators on brokerage platforms, and tip calculators that are really just a funnel to a restaurant reservation app. The math is free, but the context is commercial.
Our calculators have no context. They don’t know who you are, they don’t care what you’re calculating, and they couldn’t sell you a mortgage if they wanted to. (They can’t want things. They’re JavaScript.)
Six Calculators, Zero Agenda
Here’s what we built, and why you might actually bookmark a couple of them.
Percentage Calculator — The One Everyone Needs
Our Percentage Calculator handles five modes: find X% of Y, figure out what percentage X is of Y, calculate percentage change between two values, percentage difference, and add or subtract a percentage from a number.
Every mode shows the formula alongside the result, so you’re not just getting an answer — you’re seeing how the math works. It’s the kind of thing that would’ve saved us approximately ten thousand “wait, which number do I divide by?” moments over the years.
When you’ll reach for it: Calculating discounts while shopping, figuring out grade percentages, analyzing month-over-month changes in a spreadsheet, or any time your brain decides that fractions are too much work today. (Which is most days, honestly.)
Tip Calculator — Dinner Math, Solved
The Tip Calculator does the one thing you need it to do at a restaurant: tell you how much to tip and how to split the bill. Preset buttons for common percentages (15%, 18%, 20%, 25%), a custom option for when you want to dial in something specific, and a split feature that divides both the food cost and the tip evenly.
There’s a “round up to nearest dollar” toggle, because nobody wants to Venmo someone $17.43.
When you’ll reach for it: Every time you eat out with friends and the check arrives. Pull it up on your phone, tap the percentage, set the split, done. Back to the conversation in five seconds.
BMI Calculator — No Wellness Plan Attached
This one matters. Most BMI calculators online live on health sites that are, one way or another, trying to sell you a wellness plan, a supplement, a coaching program, or at minimum your email address. Our BMI Calculator gives you a number, a color-coded gauge, your category, and a healthy weight range for your height. That’s it.
It supports both imperial (feet/lbs) and metric (cm/kg), because this is the internet and people come from everywhere.
We also include a disclaimer — and we mean it — that BMI is a screening tool, not a diagnosis. It doesn’t distinguish muscle from fat, and it shouldn’t be the only thing you look at. Talk to a doctor if you have real health concerns. We’re a calculator, not a clinic.
When you’ll reach for it: Curiosity, mostly. A quick check during a wellness routine. Settling a debate about what “normal BMI” actually means. (It’s 18.5 to 25, for the record.)
Age Calculator — More Than “How Old Am I?”
The Age Calculator computes years, months, and days between any two dates. By default it uses today as the end date, so you get your exact age right away. But you can change both dates — making it a general-purpose date difference tool.
It tells you your next birthday, how many days until it arrives, and what day of the week it falls on. There’s a “fun facts” panel that shows your age in months, weeks, days, hours, and minutes. (You’ve been alive for a lot of minutes. Try not to think about how many of them you’ve spent in meetings.)
When you’ll reach for it: Filling out forms that want your exact age in years and months. Figuring out how many days until a deadline, an anniversary, or retirement. Winning an argument about who’s older. The usual.
Mortgage Calculator — Just the Math
Our Mortgage Calculator computes your monthly payment from the loan amount, interest rate, and term. It breaks down principal vs. interest over the life of the loan, shows you the total interest you’ll pay, and gives you a year-by-year amortization schedule.
What it doesn’t do: suggest lenders, ask for your credit score, or try to “match” you with anything. It’s a calculator. It calculates. Full stop.
When you’ll reach for it: When you’re curious about monthly payments at different price points and rates. When you want to see the real cost difference between a 15-year and 30-year mortgage. When you want to play “what if” without leaving a trail of data breadcrumbs across the internet.
Compound Interest Calculator — Watch Your Money Grow (Hypothetically)
The Compound Interest Calculator shows how an initial investment grows over time with regular contributions and compounding interest. You set the principal, the monthly contribution, the annual rate, the compounding frequency, and the time horizon — and it draws a chart showing year-by-year growth with your contributions and earned interest separated out.
It’s satisfying in the way that savings projections are always satisfying — until you remember you have to actually save the money. (We’re working on a motivation calculator next. Just kidding. Or are we?)
When you’ll reach for it: Planning retirement contributions, comparing savings accounts, showing a teenager why compound interest is the closest thing to magic that math has to offer, or just running optimistic projections when you need a serotonin hit.
The Privacy Part (It’s Short, We Promise)
Every calculator runs entirely in your browser. Your mortgage amount, your weight, your investment projections — none of it is transmitted anywhere. There’s no server to send it to. The calculations happen in JavaScript on your device, and when you close the tab, the data is gone.
This matters more for calculators than you might think. Financial and health data are two of the most valuable categories in online advertising. When you type your salary into a loan calculator on a comparison site, that’s a signal. When you enter your weight into a BMI tool on a health platform, that’s a signal. These signals get collected, aggregated, and sold.
On EasyWebTools, they don’t exist. We couldn’t collect them even if we wanted to. (We don’t want to.)
What’s Next
We’re up to 11 live tools now — the original 5 plus these 6 calculators — and we’re nowhere near done. The next batch includes developer tools, design tools, and some high-traffic heavyweights we’ve been planning for a while.
If you’ve used any of our tools and there’s something we could do better, we’d genuinely like to know. And if there’s a calculator we haven’t built yet that you wish existed, consider that a formal invitation to tell us.
In the meantime, go try splitting a bill with the tip calculator. It’s faster than the argument, and significantly less awkward than asking the server to do math on the spot. Trust us on this one — we’ve been that table.