Free Online Calculators and Converters

Free online calculators and developer tools. Fast, private, no signup required.

Popular calculators

Calculate BMI from your height and weight.

Calculate monthly mortgage payment. How much house can I afford? What is my monthly payment with taxes and insurance? Free online mortgage calculator with PMI, property tax, and amortization.

Percentage Calculator

Calculate percentages, percentage changes, and increases. Free math calculator for discounts, tips, taxes, and everyday calculations.

Age Calculator

Calculate your exact age in years, months, and days

TDEE Calculator

Calculate daily calorie needs. Free online total daily energy expenditure calculator with BMR. Estimate how many calories you burn per day based on age, gender, weight, height, and activity level to achieve your weight goals.

Compound Interest Calculator

Calculate compound interest and investment growth. Free compound interest calculator with compound frequency options for savings and investments.

Loan Calculator

Calculate monthly loan payments and total interest. Free loan amortization calculator for mortgages, auto loans, and personal loans.

Due Date Calculator

Calculate your baby's due date based on last period. Free pregnancy calculator showing expected delivery date and current week.

Date Difference Calculator

Calculate the number of days between two dates

VAT Calculator

Calculate VAT and sales tax amounts instantly. Free VAT calculator for EU, UK, and global tax rates.

Password Generator

Generate strong, random passwords instantly. Free, private, no signup required.

Word Counter

Count words, characters, sentences and paragraphs as you type, with reading and speaking time and the words you lean on most. Nothing you paste leaves your browser.

Browse by category

Health10

Blood Pressure Calculator · BMI Calculator · Body Fat Calculator