About CalculatorXP
Free, fast and accurate calculators for everyday life — finance, health, maths, science and dates. No sign-up required.
Finance
18 calculators — mortgage, loans, tax, investments, salary and more.
Health
10 calculators — BMI, BMR, calories, body fat, pace, heart rate and more.
Math
9 calculators — percentages, fractions, statistics, prime factors and more.
Science
8 calculators — unit converter, density, Ohm's law, periodic table and more.
What Is CalculatorXP?
CalculatorXP is a free collection of online calculators designed to be genuinely useful. Every calculator shows step-by-step working so you understand the result, not just the number. All calculators work on any device — mobile, tablet or desktop — and require no sign-up or download.
Our calculators are built with accuracy and clarity in mind. Where there are multiple established methods or formulas, we show them all. Results include context — visual bars, comparison tables and real-world examples — to help you make sense of the numbers.
Our Categories
Accuracy and Limitations
CalculatorXP calculators use established formulas and are designed for general guidance. Health calculators use population-average formulas which may not perfectly reflect your individual situation. Financial calculators assume fixed rates and do not account for fees, penalties or tax unless stated. Always consult a qualified professional for important financial, medical or legal decisions.
Contact
Have a suggestion for a new calculator, spotted an error, or want to get in touch? We'd love to hear from you. Use the contact form or email us directly at hello@calculatorxp.com.