Free Business Calculators

Quick math for everyday decisions — EMI, BMI, percentage, interest, unit conversions.

Mortgage Calculator

Calculate your monthly mortgage payment, total interest, and full amortisation

Random Number Generator

Generate random integers or decimals between any min and max

GPA Calculator

Calculate your GPA from credits and grades

Calorie Calculator

Calculate your daily calorie needs — BMR, TDEE, and targets for weight loss or gain

Investment Calculator

Calculate future value, total returns, and year-by-year growth for any investment

Word Unscrambler

Find every valid word hiding in a set of scrambled letters

Due Date Calculator

Calculate your pregnancy due date from LMP, conception date, or IVF transfer — with gestational age and key milestones

Paycheck Calculator

Calculate your take-home pay after federal tax, Social Security, Medicare, and state tax

Retirement Calculator

Project your retirement savings, monthly income with the 4% rule, and year-by-year growth

Sales Tax Calculator

Calculate sales tax — add tax to a price or reverse it from a total

Salary Calculator

Convert hourly, weekly, bi-weekly, monthly, and annual pay instantly

Tip Calculator

Calculate tip amount and split the bill between any number of people

Miles to Km

Convert miles to kilometres instantly

Fraction Calculator

Add, subtract, multiply, and divide fractions with the simplified result, decimal, and mixed number

Liters to Gallons

Convert litres to US and UK gallons instantly

Celsius to Fahrenheit

Convert °C to °F (and back) instantly

Ounces to Grams

Convert ounces to grams instantly — plus kilograms, milligrams, and pounds

Hours to Minutes

Convert hours to minutes — plus seconds, days, and weeks

CM to M Converter

Convert centimetres to metres instantly

BMI Calculator

Calculate your Body Mass Index instantly

Commission Calculator

Calculate sales commissions and revenue splits instantly

Discount Calculator

Calculate percent off, sale price, and total savings instantly

Feet to Meter Converter

Convert feet to metres instantly

Feet to Miles Converter

Convert feet to miles instantly

About free calculators

Quick math for everyday decisions: BMI, percentage, discount, commission, simple and compound interest, EMI / loan calculator (works for INR, USD, EUR), tip calculator, and unit conversions for length (cm / inch / feet / meter), weight (kg / lb), and volume (ml / oz).

Each calculator shows the formula so you can check the work or use it for a class assignment. Everything runs in your browser — no signup, no tracking, no upsell. Results recompute live as you type.

Need a calculator tuned to your country's tax rules or currency conventions? Request one and we'll add it.