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Free Online Calculators

Choose a calculator, enter your values, and get an instant result with formulas and worked examples.

Business Tools

Simple calculators for pricing, pay, margins, discounts, and planning.

Find the final sale price and how much you save after a percentage discount.

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Calculate gross profit and profit margin from revenue and cost.

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Convert a monthly salary into annual, weekly, daily, and estimated hourly amounts.

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Estimate a fixed monthly loan payment from principal, annual interest rate, and term.

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Helpful calculators for GPA, CGPA, attendance, grades, and study planning.

Calculate a weighted GPA from course grades and credit hours on a 4.0 scale.

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Estimate your updated cumulative GPA after a new semester.

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Check your attendance percentage and how many classes you may need to reach a target.

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Fast calculators for percentages, dates, age, and day-to-day decisions.

Calculate a percentage of any number, plus percentage increase or decrease, in seconds.

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Calculate age in years, months, and days between a birth date and a selected date.

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Find the number of days and weeks between two calendar dates.

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