DocumentationGetting Started with 7Calculator
Welcome to 7Calculator — a collection of free online calculators for finance, fitness & health, math, and everyday life.
This short guide walks you through how to find the right calculator and get reliable results.
1. Browse by category
7Calculator groups tools into four main categories:
- Financial calculators – loans, mortgages, interest, investments, retirement, salary, tax, and more.
- Fitness & health calculators – BMI, calories, BMR, ideal weight, pace, pregnancy dates, etc.
- Math calculators – scientific, fractions, percentages, triangles, statistics, and other math helpers.
- Other calculators – dates, time, GPA, grades, construction quantities, subnetting, passwords, unit conversions, and more.
From the homepage or /calculator, you can jump directly into any category or open the “View all” page to see every calculator in that group.
2. Using an individual calculator
On each calculator page you will find:
- A clear title and input form at the top.
- A result area that updates when you enter values.
- A description section with headings like What this calculator does, How to use this calculator, and How to interpret your result.
For most tools, you only need to:
- Enter the required numbers (for example, loan amount, interest rate, or your weight and height).
- Choose any relevant options (term length, units, compounding frequency, etc.).
- Read the result and the explanation below it.
3. Getting accurate results
To get the most out of 7Calculator:
- Double‑check your inputs – especially units (kg vs lb, years vs months, percentages vs decimals).
- Read the assumptions in the description section so you know how the formula works.
- Compare scenarios by changing one input at a time (for example, trying different interest rates or time horizons).
Remember that all calculators use standard formulas and typical assumptions, but real‑world outcomes can differ.
4. When to seek professional advice
7Calculator is designed for education and quick estimates. It does not replace:
- Financial, tax, or investment advice from a qualified professional
- Medical guidance, diagnosis, or treatment
- Legal advice or formal engineering calculations
Use the results as a starting point for understanding a topic, then follow up with experts when making important decisions.
If you are unsure which calculator to use, start on the /calculator page, pick the category that matches your goal, and open any tool that looks close — the description at the bottom of the page will clarify what it is best suited for.