All calculators
⚖️ BMI Calculator
Body mass index from height and weight, metric or imperial, with healthy range.
％ Percentage Calculator
What is X% of Y, percentage of a total, and percent change.
🏠 Loan Calculator
Monthly payment, total interest and payoff for any loan or mortgage.
📈 Compound Interest
Watch savings grow with monthly contributions and compounding.
🎂 Age Calculator
Exact age in years, months and days — plus days until your next birthday.
🧾 Tip Calculator
Tip amount and per-person split for any bill.
📏 Unit Converter
Length, weight, temperature and volume conversions in one tool.
Calculators for the questions that keep coming back
Everybody hits the same few number questions over and over. What's the tip on $86? What would the monthly payment be on that car? How many days until the wedding? CalculatorWorks is a small set of tools for exactly those moments. Each one does a single job, loads fast, and keeps working offline once the page is open. No account, no upload, no premium wall. The math runs in your browser, so whatever you type stays on your device.
What each tool is for
Here's a quick guide to which calculator solves which problem:
- BMI Calculator — check your body mass index from height and weight, in metric or imperial, and see the healthy-weight range for your height.
- Percentage Calculator — work out X% of a number, what percent one figure is of another, and percentage increase or decrease.
- Loan Calculator — find the monthly payment and total interest on a mortgage, car loan, or personal loan, with a year-by-year balance table.
- Compound Interest Calculator — project how savings grow over time with regular contributions and compounding.
- Age Calculator — get an exact age in years, months, and days, plus a countdown to the next birthday.
- Tip Calculator — add a tip and split the bill between any number of people.
- Unit Converter — convert length, weight, temperature, and volume between metric and imperial.
Why it's fast and private
The math happens on your device, not on a server. That's why results appear the instant you type, and it's also why nothing you enter is sent anywhere, stored, or tracked. The basic calculator at the top of the page handles brackets and full order of operations, and your keyboard works on every tool. It's free, and it stays free. If you want the thinking behind the numbers, the guides cover tipping math, loans, saving, and what BMI really measures.