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The Calculator
Access 1,000+ free online calculators for health, finance, math, and lifestyle topics on a mobile-friendly site.
Use free calculators for health, finance, and more
The Calculator is an easy-to-use website offering over 1,000 free online calculators and tools covering a wide range of topics. Whether you need help with health and medical algorithms, financial calculations, math problems, or lifestyle questions, this site has the right tool for you. It’s designed to be mobile-friendly so you can access it anytime, anywhere.
You can find calculators for everything from age difference and generation calculators to finance and personality tests. The site also provides quizzes and converters, making it a handy resource for quick answers and practical tools. It’s perfect if you want simple, reliable calculators without the hassle of downloads or complicated instructions.
With a broad selection of topics and a clean, responsive design, The Calculator helps you get the answers you need quickly. Whether you’re a student, professional, or just curious, you can use this site to support your daily tasks and decision-making with easy-to-understand tools.
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Find free online calculators for finance, health, and fitness to help you manage money, plan loans, and track your wellness—no downloads needed.
MDCalc offers easy-to-use medical calculators, equations, and scoring tools to support healthcare professionals in clinical decision-making and patient care.
Find evidence-based clinical calculators and decision tools for medical professionals, including dosing guides, pharmacokinetic utilities, and drug databases.
Check your Body Mass Index (BMI) easily and see if you're at a healthy weight, with results tailored by age and gender for quick insights.
Find the stage of your melanoma using clinical data with this Dutch-language online calculator and helpful guides for understanding your diagnosis.
Ped(z) offers pediatricians easy-to-use online calculators for child growth, blood pressure, and heart measurements in both German and English.
Pool Calculator helps you manage swimming pool and hot tub chemicals with easy tools and guides for clear, balanced water and simple maintenance.
Find easy-to-use inflation calculators and financial tools to track changes in purchasing power and learn more about inflation trends in the U.S.
Calculate US dollar inflation from 1913-2025, compare historical prices, and explore inflation trends with easy-to-use tools and up-to-date data.
Calculator+iO offers a wide range of free online calculators for math, finance, health, science, and more, all in one easy-to-use website.
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