Calculators
Everyday money, health and date maths โ loans, EMI, interest, GST, BMI and more.
10 tools available
Age Calculator
Find an exact age in years, months and days from a date of birth โ plus the next birthday countdown.
BMI Calculator
Calculate Body Mass Index in metric or imperial units, with the WHO category and healthy weight range.
Compound Interest Calculator
Project growth with any compounding frequency, with optional regular monthly contributions.
Date Difference Calculator
Count the days, weeks and months between two dates โ with or without weekends.
Discount Calculator
Find the sale price and the amount saved, or work backwards to the discount percentage.
EMI Calculator
Work out the monthly instalment on a loan, with total interest and a full amortisation schedule.
GST Calculator
Add or remove GST at any rate, with the CGST and SGST split shown separately.
Loan Calculator
Solve for payment, loan amount or tenure, and see total cost with a repayment schedule.
Percentage Calculator
Five percentage calculations in one place โ including percentage change and reverse percentages.
Simple Interest Calculator
Calculate simple interest and maturity value from principal, rate and time.
About these calculators
This section collects the calculations most people actually need: what a loan will cost each month, how much interest a deposit earns, what a discounted price works out to, and how far apart two dates really are.
Every calculator runs entirely in your browser. Nothing you type is sent to a server, so you can safely work out figures for a real salary, a real loan or a real invoice without leaving a trace on someone else's machine.
Each page shows the formula being used and a worked example, so you can check the result by hand rather than trusting a black box.
Other categories
Text Tools
Count, clean, sort and reshape text โ word counts, case conversion, duplicate removal.
7 available
Developer Tools
Format, validate, encode and decode โ JSON, Base64, URLs, UUIDs, timestamps, regex.
8 available ยท 3 coming soon
Converters
Unit conversion for length, weight, temperature, speed, data, time, area and volume.
0 available ยท 8 coming soon
Image Tools
Compress, resize and convert images entirely inside your browser โ nothing is uploaded.
0 available ยท 6 coming soon
PDF Tools
Merge, split, compress and convert PDF documents privately in the browser.
0 available ยท 5 coming soon