Calculators
Free online calculators for age, BMI, percentages, loans, discounts, GST, and date differences — instant results, no sign-up required.
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Calculators overview
Calculators make everyday math simple with tools for age, BMI, percentages, loans, discounts, GST, and date differences.
Each calculator gives instant, accurate results and is free to use, making it easy to budget, plan, and check everyday figures on any device.
Everyday calculations become instant with this category of free calculators. Work out age, BMI, percentage change, discounts, loan payments, GST, and date differences without reaching for a spreadsheet, and without signing up for anything.
Each calculator shows the formula and the result clearly, so you can trust the number and understand where it comes from. They are built for quick, single answers - whether you are budgeting, comparing plans, or just checking a figure - and all computation happens in your browser.
Browse the current collection of tools below and filter by keyword to find the exact utility you need.
Age Calculator
math
Calculate your exact age in years, months, days, total days, and total hours from your birth date.
BMI Calculator
math
Calculate your Body Mass Index (BMI) to determine if you're underweight, normal, overweight, or obese.
Date Difference Calculator
math
Calculate the exact difference between two dates in years, months, days, weeks, hours, and minutes.
Discount Calculator
math
Calculate the final price after a discount. Find the savings amount and final price from original price and discount percentage.
GST Calculator
math
Calculate GST for your business. Add or remove GST from amounts using the Indian GST rates of 5%, 12%, 18%, and 28%.
Loan Calculator
math
Calculate monthly payments, total payment, and total interest for loans with adjustable amount, rate, and term.
Percentage Calculator
math
Calculate percentages in multiple ways: what is X% of Y, X is what % of Y, X is Y% of what, and percentage change.
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