BMI Calculator
Calculate your Body Mass Index (BMI) instantly using height and weight. Metric and imperial units supported.
Age Calculator
Calculate exact age in years, months and days from date of birth. Also shows next birthday countdown.
Percentage Calculator
Calculate percentages, percentage change, percentage of a number and more with this all-in-one tool.
Loan EMI Calculator
Calculate monthly loan EMI, total interest payable and repayment schedule for any loan amount.
GST Calculator
Calculate GST amount, add or remove GST from a price. Supports all GST slabs (5%, 12%, 18%, 28%).
No tools match your filter.
Free Online Calculators — Fast, Accurate & Private
DotThemes Tools's calculator collection covers the most common math problems people face daily — from checking whether your weight is healthy to calculating your monthly loan payment or figuring out the right GST amount on an invoice. Every calculator runs entirely in your browser, meaning your data never reaches our servers.
Our BMI Calculator follows the World Health Organization formula and supports both metric and imperial units. The Loan EMI Calculator uses standard amortization math to show your monthly payment, total interest, and full repayment schedule. The GST Calculator handles both GST-inclusive and GST-exclusive calculations in one click.
All calculators are mobile-friendly, load instantly, and require no account or subscription — ever.