About ThinkCalculators
Free, fast and easy-to-use online calculators for everyday life — backed by a blog that explains the numbers.
Who We Are
ThinkCalculators is an online platform built to make everyday calculations simple. Whether you want to check your BMI, compare salaries, convert units, work out your age, estimate building materials or solve a school problem, you should not need a spreadsheet or a degree in maths to get a reliable answer. Our calculators are designed to be clear, quick and usable on any phone, tablet or computer.
Our Mission
Our mission is to put useful tools in everyone’s hands, for free. We want every visitor to get an accurate result in seconds and, just as importantly, to understand how that result was reached.
What You Will Find Here
- A wide range of calculators — organised into categories so you can find the right tool quickly:
Health & Fitness, Finance & Salary, Math & Conversion, School & Grades, Age & Date/Time, Gaming, Construction & Home, Physical Products (Devices) and Misc / Other. - A helpful blog — guides, tips and explanations that go deeper into the topics behind our calculators. Visit the ThinkCalculators Blog.
- Guest posts — we welcome useful, original articles from writers and experts. See our Write for Us page for details.
Our Commitment
- Simplicity — clean tools with no unnecessary steps.
- Accuracy — we use standard, widely accepted formulas and keep improving them.
- Accessibility — free to use and mobile-friendly.
- Transparency — we are honest about what our tools can and cannot do.
A Note on Results
Our calculators provide estimates for general information and educational purposes only. They are not a substitute for professional medical, financial, legal or engineering advice. Please read our Terms and Conditions for more information.
Get in Touch
Found a mistake, have an idea for a new calculator or just want to say hello? Email us at thinkcalculators@gmail.com or visit our Contact Us page. We read every message.