Everyday Calculators
Clear answers for everyday numbers
Percentage Calculator
Find a percentage of a number, compare two numbers, or calculate percentage change.
Age Calculator
Find your age in years, months, and days, plus total months and days.
BMI Calculator
Estimate adult body mass index from height and weight.
Discount Calculator
Calculate the sale price, savings, and optional tax after a discount.
Loan Calculator
Estimate a fixed monthly payment and total interest on a loan.
VAT Calculator
Add VAT to a net price or remove it from a tax-inclusive amount.
Tip Calculator
Calculate the tip and split the total bill evenly between people.
Salary Calculator
Convert gross hourly, weekly, monthly, and annual pay before taxes.
Profit Margin Calculator
Find gross profit, margin, and markup from cost and selling price.
Unit Converter
Convert length, weight, temperature, and speed with clear units.
GPA Calculator
Calculate a weighted GPA from course grades and credits.
Fraction Calculator
Add, subtract, multiply, or divide two fractions and see the decimal result.
Simple Interest Calculator
Calculate simple interest earned and the final balance.
Compound Interest Calculator
Calculate compound growth with monthly deposits, daily or monthly compounding, a year-by-year table and calculation steps.
Fuel Consumption Calculator
Calculate fuel economy from distance and fuel used.
Area Calculator
Find the area of a rectangle, triangle, or circle.
Concrete Calculator
Estimate concrete volume for a rectangular slab with a waste allowance.
Mortgage Overpayment Calculator
Estimate interest saved and time reduced by making extra monthly payments.
Date Difference Calculator
Count the exact calendar days between two dates.
Time Card Calculator
Calculate paid hours from a start time, end time, and unpaid break.
Calorie Calculator
Estimate daily maintenance calories from age, body size, sex, and activity.
TDEE Calculator
Estimate total daily energy expenditure from resting metabolism and activity.
Average Calculator
Calculate the mean, minimum, and maximum of four values.
Salary Increase Calculator
Calculate the new salary and increase amount from a raise percentage.
Paint Calculator
Estimate paint needed from wall area, coats, and coverage.
Ratio Calculator
Simplify a ratio, compare two quantities, and convert a ratio to a decimal.
Square Footage Calculator
Calculate floor or room area in square feet from length and width.
1RM Calculator
Estimate your one-rep max from a weight and the number of repetitions.
Online Grading Calculator
Convert points earned and possible into a percentage and letter grade.
LCM Calculator
Find the least common multiple of two positive whole numbers.
Pythagorean Theorem Calculator
Find the hypotenuse of a right triangle from its two perpendicular sides.
Quadratic Formula Calculator
Solve a quadratic equation and find its real roots from a, b, and c.
Body Fat Percentage Calculator
Estimate adult body fat percentage from BMI, age, and sex.
CPM Calculator
Calculate cost per thousand impressions, campaign cost, or estimated impressions.
Scientific Notation Calculator
Convert a number into scientific notation with a coefficient and exponent.
Log Calculator
Calculate a logarithm for any positive value and valid base.
Matrix Multiplication Calculator
Multiply two 2×2 matrices and display every entry of the product.
Limit Calculator
Evaluate common one-variable limits with transparent formulas.
RREF Calculator
Reduce a 2×2 matrix to reduced row echelon form step by step.
Gold Calculator
Estimate gold value from weight, purity, and a price per gram.
Zakat Calculator
Estimate zakat on cash, gold, silver and eligible business assets. Compare your net wealth with a gold or silver nisab using your own prices.
Zakat on Gold Calculator
Calculate the pure-gold equivalent, gold nisab and estimated zakat from grams, karat and your valuation price. For gold-only holdings.
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