Free Online Calculators
Accurate calculators for money, business, time and health: loan EMI, mortgage, compound interest, VAT, profit margin, ROI and break-even, plus percentage, age, date, business days, BMI, unit and currency conversion.
25 free tools · no sign-up
Calculator
A clean everyday calculator.
Percentage Calculator
Work out percentages, increases and decreases.
Age Calculator
Find exact age from a date of birth.
Loan / EMI Calculator
Estimate monthly loan instalments.
BMI Calculator
Calculate body mass index.
Unit Converter
Convert length, weight and temperature.
Currency Converter
Convert 160+ currencies at hourly rates.
Date Difference
Count the days between two dates.
Discount Calculator
Work out sale prices and margins.
Compound Interest Calculator
See how savings grow with compounding and monthly deposits.
Salary Calculator
Convert pay between hourly, daily, weekly, monthly and yearly.
Profit Margin Calculator
Margin, markup and selling price from your cost.
VAT & Sales Tax Calculator
Add or remove VAT or sales tax from a price.
Tip Calculator
Work out the tip and split the bill.
ROI Calculator
Return on investment, profit and annualised return.
Break-Even Calculator
How many units you must sell to cover your costs.
Time Duration Calculator
Hours and minutes between two times, minus breaks.
Date Add / Subtract
Add or subtract days, weeks, months or years from a date.
Business Days Calculator
Count working days between two dates, minus holidays.
Fuel Cost Calculator
Trip fuel cost from distance, economy and price.
Electricity Cost Calculator
What an appliance costs to run per day, month and year.
Loan Payoff Calculator
When you'll be debt-free, and what extra payments save.
Mortgage Calculator
Monthly home loan payment with tax, insurance and a schedule.
Percentage Change Calculator
Percentage increase or decrease between two numbers.
Print Size & DPI Calculator
How big an image prints, and the pixels a size needs.
Questions
Are these Calculators tools really free?
Yes. All 25 tools in this category are free to use, with no sign-up and no watermark on your files.
Are my files and text kept private?
Every tool here runs entirely in your browser, so nothing you open or type is uploaded to a server.
Do I need to install anything?
No. The tools work in any modern browser on Windows, Mac, Linux, Android and iPhone.