Best Free Online Calculators for Everyday Life

Calculators are the most-searched category of online tool for a reason — everyone needs one eventually, for something. Here's a roundup of the ones people reach for most, and exactly when to use each.

Everyday Life

• Age Calculator — exact age in years, months, and days from a birth date.
• Date Difference Calculator — days between any two dates.
• Time Calculator — add or subtract hours, minutes, and seconds.

Health

• BMI Calculator — Body Mass Index and health category from height and weight.
• Calorie Calculator — estimated daily calorie needs.
• Pregnancy Due Date Calculator — estimated due date from your last period.

Money & Finance

• EMI / Loan Calculator — monthly loan installment amounts.
• Mortgage Calculator — estimated home loan payments.
• Compound Interest Calculator — how investments grow over time.
• SIP Investment Calculator — future value of monthly investments.
• Retirement Calculator — projected retirement savings.

Shopping & Bills

• Discount Calculator — final price after a percentage discount.
• GST / VAT Calculator — tax-inclusive or exclusive pricing.
• Fuel Cost Calculator — estimated trip fuel cost.
• Electricity Bill Calculator — estimated monthly electricity bill.

See the full list on our Calculators page — every one is free, requires no sign-up, and calculates instantly in your browser.