About FinanceTools

What We Do

FinanceTools is a free website offering practical calculators and unit converters for health metrics and everyday measurements. Every tool runs entirely in your browser — nothing is stored on a server, and you don't need an account to use anything.

We started with one frustration: finding a clean, no-nonsense BMI calculator that didn't require you to sit through ads, pop-ups, or a sign-up wall. From there the site grew to include age calculation and a full library of unit converters covering length, weight, temperature, volume, speed, area, angle, and power.

The goal has always been the same — give you an accurate answer in seconds and get out of the way.

Our Tools

• BMI Calculator

  Works in both imperial (feet, inches, pounds) and metric (centimetres, kilograms). Shows your BMI value alongside a colour-coded scale and the four standard categories — Underweight, Healthy, Overweight, and Obesity — based on thresholds published by the National Heart, Lung, and Blood Institute.

• Age Calculator

  Enter a date of birth and a reference date (defaulting to today) to get an exact age breakdown — years, months, days, and the total number of days lived. It also shows when the next birthday falls.

• Unit Converters

  Over 30 individual converters covering length, weight, temperature, volume, speed, area, angle, and power. Each one has a live two-panel interface so you can type in either direction, a formula reference, and a table of common values.

How We Handle Accuracy

We take the numbers seriously. BMI formulas follow the NHLBI standard — 703 × weight(lb) ÷ height(in)² for imperial and weight(kg) ÷ height(m)² for metric. Category thresholds (18.5, 25, 30) match widely accepted clinical guidelines.

Unit conversion factors come from the International System of Units (SI). For example, the inch-to-centimetre factor (1 in = 2.54 cm exactly) has been fixed by international agreement since 1959. Temperature conversions use the exact mathematical definitions, not rounded approximations.

If you spot a result that looks wrong, please contact us. We review every report and correct errors promptly.

A Note on Health Information

BMI is a screening tool, not a diagnosis. It tells you where your weight-to-height ratio sits relative to population averages, but it doesn't measure body fat directly and doesn't account for muscle mass, bone density, age, or sex. A single number from a calculator is never the full picture of someone's health.

If you have questions about your weight or health, talk to a doctor or registered dietitian. Our tools are here to give you a quick reference point, not a medical opinion.

Privacy

We don't collect your personal data. No accounts, no tracking cookies from us, no analytics on what you calculate. What you type into our tools stays in your browser.

We do show ads through Google AdSense, which may use cookies to serve relevant advertisements. Full details are in our Privacy Policy.

Get in Touch

Questions, feedback, or error reports — we're happy to hear from you.

Email: hello@online.com

Or visit our Contact page for more details on what to include and common questions.