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Free, precise tools for math, finance, and health — with the reasoning shown, not just the answer.
Material estimating and measurement calculators for construction, landscaping, and home-improvement projects.
Date and time calculation tools
Financial and money related calculators
Health and fitness calculators
Mathematics and general calculation tools
Unit and measurement conversion calculators
Multiply two numbers with the standard long multiplication method - see every partial product, carry, and place-value shift for whole numbers and decimals.
Enter six coefficients to solve two linear equations for x and y using Cramer's Rule - see the determinant, Dx, Dy, and a verified answer at every step.
Add, subtract, multiply, divide, and simplify fractions, or convert between a fraction and a decimal - every result reduced to lowest terms, steps shown.
Type what you need in the search box, or browse a category if you're not sure which calculator you want.
Open the calculator that matches - each one is built for a single, specific question, not a generic form.
Enter your numbers and get an instant result, with the reasoning shown step by step, not just the final answer.
Every calculator is free to use. No account, no email, no paywall.
Results come with the steps behind them, not just a final number.
Calculations run in your browser - your numbers are never sent to a server.
CloudCalcApp is a free collection of calculators covering Construction & DIY, Date & Time, Finance, Health, Math, Unit Conversion. Search for what you need or browse a category above - every calculator gives a direct answer along with the steps behind it.