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Thousands of Free Calculators

“A calculator is a tool for humans to do math more quickly and accurately than they could ever do by hand; similarly, AI computers are tools for us to perform tasks too difficult or expensive for us to do on our own…”

Oren Etzioni

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About Us

CalcHub is a professional construction and engineering calculator platform designed to simplify material estimation, structural planning, and technical computations.

Mission & Purpose

The mission of CalcHub is to make accurate calculations accessible to everyone — whether you’re managing finances, planning health goals, solving math problems, or doing conversions — by providing simple, reliable, and free calculators.

We develop technology that simplifies every calculation-based challenge, making it easy for anyone to solve.

Percentage Calculator

Quickly calculate percentage increase, decrease, difference, and ratios for finance, exams, shopping discounts, and everyday numerical comparisons.

Loan EMI Calculator

Easily estimate monthly EMI, total interest, and loan cost to plan repayments and manage personal or business finances better.

GPA Calculator

Calculate GPA accurately by entering grades and credits to track academic performance, progress, and future educational planning goals.

BMI Calculator

Measure body mass index instantly to understand weight status, health category, and maintain fitness and wellness awareness effectively.

Square Footage Calculator

Calculate total area of rooms or spaces accurately for construction planning, flooring estimation, and home improvement projects.

Salary to Hourly Calculator

Convert annual or monthly salary into hourly wages to compare jobs, evaluate income, and plan working hours efficiently.